Why does my 2000 venture not turn over?
Why does my 2000 venture not turn over?
2000 Venture V/6 120,000 miles , bought used, ran great for year , now suddenly won’t turn over . New battery, ignition checks out , daytime running lights even go off when key turned to start like they’re supposed to Red light is on the radio which hints of security issues
What was the problem with my Chevy Venture?
We finaly solved the problem for my Chevy Venture engine racing. We removed the throttle body to make sure that the gasket was not leaking and to make sure the idle sensor was sitting right. What we discovered was that the TPS (Throttle Postioning Sensor) needed to be replaced.
Why does my car shut off while driving?
The most common reason that a vehicle shuts off when driving is a lack of fuel. The most likely cause is an empty fuel tank aided by a fuel gauge that’s not as accurate as it looks. Even if it says there is fuel in there, bang on the tank. If it makes a hollow sound, it’s probably empty.
What causes Chevy Silverado to shut down while driving?
Parts stores can scan it for you if you don’t have access to a scanner. But we don’t recommend driving anywhere until your Silverado is fixed, since dying at the wrong time can cause a collision. 1. Out of Fuel
What causes a truck to shut off and then start up again?
Answer: This could be a problem of a failing fuel pump. This is pretty common on this truck. Normally this would cause the truck to sort of stumble before it stalls. If it just instantly shuts off like you are turning the key off, then it may be a problem in the ignition switch in the steering column, or an ignition control module.
When does a GMC Truck shut off when in gear?
Chevrolet- GMC Truck Shuts Off When In Gear. After the motor heats up when i put the truck in drive. It also shut off when i put in reverse. The Chevy truck stalls . Sometimes the truck shuts off but mostly when i put the Chevrolet in drive it shuts off.sometimes it shuts off when i put the truck in gear. GMC Truck Shuts Off When In Gear.
How long should the fuel pump run before starting a truck?
Was hot humid and raining out but never a problem before with starting when left truck without running before thank you. Answer: The fuel pump should run for 2-3 seconds with the key in the ON position, not cranking.
What causes rough idle on Chevy 350 engine?
I pushed the throttle lever to the stop and the rough idle seemed to disappear. So I hunted around for a spring to install to pull the throttle linkage to the stop and installed it. There’s the spring installed to pull the throttle linkage back to the stop. So here’s what I figured out was happening to cause the engine to not idle properly.
What does rough idle mean on a car?
Rough idle could also be Idle Air control valve (IAC) going bad (it controls your idle speed) or a host of other things…hard to diagnose without some more info As for the #5 fan setting – I think its a separate issue – blower resistor going bad perhaps – cheap part about $ 20, its located behind the blower on the passenger side front.
Why does my Dads 93 Chevy truck die?
My Dads 93 was doing what seems to be the same thing as yours. It ended up being the Fuel Pump Relay. If I press the gas pedal it dies. It’s been acting weird for a while now. For instance, when I take off from a dead stop at a light it sort of hesitates when I hit the gas.
We finaly solved the problem for my Chevy Venture engine racing. We removed the throttle body to make sure that the gasket was not leaking and to make sure the idle sensor was sitting right. What we discovered was that the TPS (Throttle Postioning Sensor) needed to be replaced.
2000 Venture V/6 120,000 miles , bought used, ran great for year , now suddenly won’t turn over . New battery, ignition checks out , daytime running lights even go off when key turned to start like they’re supposed to Red light is on the radio which hints of security issues
What was the cause of my 2002 Venture’s death?
I have a 2002 Venture. A month or so ago, it died while my wife was using it. After a lot of messing around, I discovered the plug that goes through the floor behind the driver’s seat was bad. I replaced it, and all went well for a while. Then it died again, (Thankfully in the yard this time). Both times the fuel pump was not kicking on.
Why does my Chevy Truck start and idle?
Not sure why this test caused a better and longer gas flow than the above test of just putting the ignition in the ON position and seeing how much gas comes out of the line before the fuel filter. Last test says to start the vehicle and remove the relay.
What does it mean when your car doesn’t start?
In a no start condition your engine does turn over when you turn the ignition key to start but the engine doesn’t start. In other words: your vehicle’s starter motor is cranking the engine but the engine is not starting. A no crank condition means that the engine is not cranking when you turn the key to crank the engine.
What’s the difference between no start and no crank?
It’s important to know that a no crank and a no start condition are not the same thing. Here’s a brief description: In a no start condition your engine does turn over when you turn the ignition key to start but the engine doesn’t start. In other words: your vehicle’s starter motor is cranking the engine but the engine is not starting.
What makes a 2000 Chevy 4.3 truck not start?
7,686 satisfied customers 2000 Chevy 4.3 truck start won’t start runs little rough 2000 Chevy 4.3 truck start won’t start runs little rough fuel pump new think it’s fuel pressure regulater … read more Roy Belding 7,686 satisfied customers
What should I do if my 2000 Chevy Silverado dies?
2000 chevy silverado starts then dies repeatedly has a new fuel pump fuel pressure regulater and mass air senser 2000 chevy silverado starts then dies repeatedly has a new fuel pump fuel pressure regulater and mass air senser – Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website.
Why does my ventures 3.4 V6 make a tapping sound?
All of the 3.4 V6 in the Ventures make a metallic tapping sound when they first start which goes away in a few minutes. Its nothing to worry about, the lifters in these motors are pretty noisy at startup.
Where was the first Chevy Venture minivan made?
The Chevrolet Venture, along with most of its General Motors minivan siblings, was built at GM’s Doraville, Georgia, assembly plant. The original Chevrolet Venture sedan in 1988.
What was the rating of the 1997 Chevy Venture?
The U.S. National Highway Traffic Safety Administration (NHTSA) gave the 1997 Chevrolet Venture a rating of four stars out of five in a head-on collision, and five stars in the side-impact collision. Tests on subsequent model years yielded results of four stars in most categories, and three or five stars in others.
When did Chevy stop making the Chevy Venture?
Production of the Chevy Venture ended on June 24, 2005. 1997 model year-Introduction of the base model in early 1997. The 1997-1999 Ventures were their new version. The LS model is also introduced.
Why does my Honda venture fan keep flickering?
Easy repair, very common failure on the Venture. The flickering seems to be common on the Venture and usually is cured by a new alternator – it probably flickers more because the fan running on high speed is a pretty big electrical draw. Just some things to check right off the bat – post more details and hopefully I can help you further.
All of the 3.4 V6 in the Ventures make a metallic tapping sound when they first start which goes away in a few minutes. Its nothing to worry about, the lifters in these motors are pretty noisy at startup.
How to troubleshoot an automotive engine high idle?
The troubleshooting procedure for high and low idle conditions are similar, which are included in the following: Step 1 – If the check engine or service engine light soon has illuminated retrieving the diagnostic trouble codes could lead you in the right direction of what the problem is, or is related too.
What causes the idle speed to go up or down?
The idle air control valve is programmed to regulate and maintain the engine idle speed at a constant rate. If the valve fails or has any issues it can cause the idle speed to be thrown off. This may result in an unusually high or low idle speed, or in some cases a surging idle speed that repeatedly climbs and falls. 2. Check Engine Light comes on
What are the symptoms of a bad idle control valve?
$0.00 1 Irregular idle speed One of the most common symptoms commonly associated with a problematic idle air control valve is irregular idle speed. 2 Check Engine Light comes on Another symptom of a potential issue with the idle control valve is an illuminated Check Engine Light. 3 Engine stalling
When did the Yamaha Venture Royale engine come out?
In 1983 Yamaha created a V4 engine that debuted in the Yamaha Venture motorcycle series. The first in the series was the Venture Royale produced from 1983 to 1993.
Is there a problem with my Yamaha Venture?
This is a known problem on the Venture/Eluder line of motorcycles. In fact, older models were known to have their fuel pump fail at high mileage (mostly at 50,000 miles or higher). The fuel pump directs fuel from the tank to the engine. Every motorcycle owner knows that a bike will run poorly without fuel or may not run at all.
Where was the Yamaha Royal Star Venture photographed?
2006 Yamaha Royal Star Venture photographed at Turkey Run State Park, Indiana. Yamaha Royal Star Venture of The Republic of China (Taiwan) Military Police Parked in Military Police School. The Yamaha Royal Star Venture is a luxury touring motorcycle built by the Yamaha Motor Company.
In 1983 Yamaha created a V4 engine that debuted in the Yamaha Venture motorcycle series. The first in the series was the Venture Royale produced from 1983 to 1993.
This is a known problem on the Venture/Eluder line of motorcycles. In fact, older models were known to have their fuel pump fail at high mileage (mostly at 50,000 miles or higher). The fuel pump directs fuel from the tank to the engine. Every motorcycle owner knows that a bike will run poorly without fuel or may not run at all.
What kind of engine does a Royal Star Venture have?
The drive package on the Royal Star Venture includes a liquid-cooled 1,294 cc (79.0 cu in) (referred to as 1,300 cc) V4 engine fed by four carburetors – one per cylinder – primed by a manually operated push-pull choke. It has four valves per cylinder, overhead camshafts, and shim-over bucket valves.
When did the Yamaha Venture Star come out?
1999: Yamaha Venture Star replaces Tour Classic and Royal Star. 2001: Yamaha Venture Star withdrawn from UK market. Yamaha XVZ1300 AT Tour Classic. Yamaha XVZ1300 TF Venture Star. 7 owners have reviewed their YAMAHA XVZ1300 ROYAL STAR (1996 – 2001) and rated it in a number of areas.
Easy repair, very common failure on the Venture. The flickering seems to be common on the Venture and usually is cured by a new alternator – it probably flickers more because the fan running on high speed is a pretty big electrical draw. Just some things to check right off the bat – post more details and hopefully I can help you further.
How many Chevy ventures were sold in 2001?
Chevrolet sold a total of 88,788 Ventures in 2001, down from 97,450 during the 2000 calendar year. Though the three models are similar in structure, they differ significantly in styling. Oldsmobiles Silhouette is positioned as the luxury version, while Pontiac focuses more on sportiness with its Montana.
When did the Chevy Venture get a refresh?
2001 model year (refresh)-OnStar is now a standard feature on the Venture. The Venture had also received a mid-cycle refresh with a redesigned front grille that matches the Chevrolet Impala’s front grille. The 2001 Venture had also received a redesigned new steering wheel. 2003 model year-More equipment packages were introduced for 2003.
Where was the first Chevy Venture car made?
The Chevrolet Venture, along with most of its General Motors minivan siblings, was built at GM’s Doraville, Georgia, assembly plant. The original Chevrolet Venture sedan in 1988. The Venture name was first used on a 1988 Chevrolet concept car, in this case a full-sized four-door sedan more aerodynamic than the 1991-1996 Chevrolet Caprice .
How to fix your Chevrolet Venture shift cable?
The Easiest Way to Fix Your Chevrolet Venture Shift Cable! If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer. An error occurred while retrieving sharing information.
Production of the Chevy Venture ended on June 24, 2005. 1997 model year-Introduction of the base model in early 1997. The 1997-1999 Ventures were their new version. The LS model is also introduced.
The Chevrolet Venture, along with most of its General Motors minivan siblings, was built at GM’s Doraville, Georgia, assembly plant. The original Chevrolet Venture sedan in 1988.
What are the features of a Chevrolet Venture?
The LS came in both short and long wheelbases, and offered aluminum wheels, a varied seating configuration, adjustable head restraints, side airbags, power windows (optional on the base models), and a remote keyless entry system.
The U.S. National Highway Traffic Safety Administration (NHTSA) gave the 1997 Chevrolet Venture a rating of four stars out of five in a head-on collision, and five stars in the side-impact collision. Tests on subsequent model years yielded results of four stars in most categories, and three or five stars in others.
Why does my Chevy Silverado lose engine power?
Keep reading to find at least one possible answer to “Why is my Chevy Silverado losing power?” Read More: How Can You Tell If Your Pickup Is Overloaded? If your GM truck occasionally loses the ability to accelerate and warns you of reduced engine power, that could be caused by a faulty throttle body.
What causes an engine to stall out without air?
It works together with the Engine Control Unit to balance the right mix of air and fuel in your engine for the best power and performance. When the throttle body is dirty, damaged, or just not receiving the right signals, airflow can be cut off to your engine. Without air, your engine cannot run and will stall out.
When did the Chevy Venture minivan come out?
The minivan Chevrolet Venture was produced from 1997 to 2005. In this article, you will find fuse box diagrams of Chevrolet Venture 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 and 2005, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.
What are the fuses on a Chevy Venture?
ALC Sensor, BCM, Electronic Brake Control Indicator Lamp Driver Module, Instrument Panel Cluster, Rear Window Wipermasher and Multifunction Switch (Fog Lamp SwitcWTraction Control Switch) and Stoplamp/Torque Converter Clutch (TCC) Switch Circuit Breaker: PWR SEATRSD. Fuses (UP): ELC and RR DEFOG
Where is the ignition switch on a Chevy Venture?
Ignition Switch to Fuses (I/P): Body Control Module Program, Front Comfort Controls Low/Medium Blower, Front Wiper/Washer, HVAC/DRL, MALL/Radio/DIC, Power Quarter Vent, Rear HVAC, Rear Wiper/Washer. SWC Accessory and Power Window Circuit Breaker
The minivan Chevrolet Venture was produced from 1997 to 2005. In this article, you will find fuse box diagrams of Chevrolet Venture 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 and 2005, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.
ALC Sensor, BCM, Electronic Brake Control Indicator Lamp Driver Module, Instrument Panel Cluster, Rear Window Wipermasher and Multifunction Switch (Fog Lamp SwitcWTraction Control Switch) and Stoplamp/Torque Converter Clutch (TCC) Switch Circuit Breaker: PWR SEATRSD. Fuses (UP): ELC and RR DEFOG
Ignition Switch to Fuses (I/P): Body Control Module Program, Front Comfort Controls Low/Medium Blower, Front Wiper/Washer, HVAC/DRL, MALL/Radio/DIC, Power Quarter Vent, Rear HVAC, Rear Wiper/Washer. SWC Accessory and Power Window Circuit Breaker
When did the new venture transfer case come out?
Transfer Case Identification Guide 32 GEARS March 2002 Live Shaft Live shaft or extension housing. Many late model New Venture transfer cases have eliminated the extension housing and have gone to a “live” rear output shaft. Manual Hubs
Is the New Process Gear division part of GM?
This deal was recently dissolved, but it consisted of the New Process Gear Division of Chrysler joining with the Muncie Division of GM to produce manual transmissions and transfer cases. Any transfer case that was built by New Process Gear will be included in the New Venture transfer case line for pur- poses of this article.
What kind of transmission case is GM genuine?
Tested to meet or exceed GM OE specifications, only GM Genuine Parts offers transmissions and transfer cases designed specifically to fit your exact Chevrolet, Buick, GMC, or Cadillac vehicle. New or remanufactured GM transmission assemblies are engineered and built specifically for Chevrolet, Buick, GMC, and Cadillac vehicles.
Why does the engine stall when I put the car in reverse?
If the engine stalls, it may be caused by a faulty idle control valve, bad O2 sensors, or clogged fuel injectors. In regards to the “pan”, we’re not sure what you are referring, so it may be a good idea to contact one of our local professional mechanics to complete a battery inspection to determine what’s going on with your 2010 Ford Focus.
What happens when I put the car in reverse?
Put the car in reverse holding the brake the car stalls, if I go into neutral or drive it works fine. If I put the car in reverse not holding the brake it shifts rough but doesn’t stall. I have not driven the car at speeds higher than 35mph, so not sure of the other gears.
Why does my car run rough at idle?
That is to say combustion may be disrupted. You will feel, and maybe hear, this as a brief stutter in the engine. You might feel that the engine runs rough or vibrates at idle, say, when you’re sitting at a red light. This is similar to the above in that it stems from poor spark timing.
Why does my car struggle to go up hills?
Once you start experiencing low cylinder compression, your vehicle will always be struggling on an incline because the engine power won’t be strong enough to push it up there. If you start to have acceleration problems as you attempt to drive uphill, do not slam down on the gas pedal to try to get up the hill.
How to troubleshoot misfire codes on GM 3.1L mini-van?
Testing a misfire condition or misfire codes (P0300, P0301, P0302, P0303, P0304, P0305, P0306) on a 3.1L or 3.4L V6 Gm car or mini-van can seem like a really difficult task. You could be asking yourself questions like: Where do I Start?
How to recalibrate the HVAC actuator in a GM Truck?
For manual systems it does not matter where the a/c controls are set but if you feel the need to do something, turn the blower switch on (I prefer speed 3) and set the temperature sliders about .5″ to .75″ from full cold. For auto systems, press the auto button, with the key on. Turn the ignition off.
How does the HVAC actuator work on a GM Sparkys?
The driver set when set to “hot” would produce heat through the ducts. The Passenger side would not blow heat on the “hot” setting but it would blow heat when set to “cold” on the Tech2. The temperature sensor readings were interesting as well.
Why are the fans on my Chevy Venture not working?
The main and auxiliary fans in my 2001 Chevy Venture have stopped working causing my van to overheat on occasion. Along with the fans not working my compressor also isn’t kicking on as they stopped working relatively at the same time I think this points to an electrical problem.
Why does my GM 3.1L engine not start?
When a malfunction occurs in one of the components that make up the anti-theft system (usually the lock cylinder), the PCM disables the fuel injectors after the engine has started, causing the engine to stall after about 3 seconds of run time. PASS-Key/Passlock system failures are a very, very common cause of no start conditions.
What causes an alternator to stop working on a car?
Once the alternator stops working, so do all of the electrical systems required to keep a car going. Other problems can also cause a car to not start. It could be a bad starter, corroded cables, or a broken connection somewhere between the battery and starter.
Can a bad alternator cause a car battery to drain?
Obviously, batteries sometimes fail on their own–but a bad alternator can actually cause the battery to drain because it’s failing to recharge it. If your battery goes dead, have the alternator checked when replacing the battery so it doesn’t happen again.
Can a Saab 92 start with a bad alternator?
Dual ignition coils (the blue cylinders at the top of the picture) on a Saab 92. Before you go out and order a new battery or alternator, test some of these different systems. If your alternator, coil, battery, or starter is bad, the car probably won’t start, and it definitely won’t be drivable.
Where is the alternator located on a Yamaha Venturer?
The stator and rotor of the alternator are located inside the left engine cover. The rotor is attached to the crankshaft and contains permanent magnets. The stator coil is mounted stationary to the engine cover and is surrounded by the rotor magnets.
Can a bad battery cause an alternator to fail?
Battery dies Obviously, batteries sometimes fail on their own–but a bad alternator can actually cause the battery to drain because it’s failing to recharge it. If your battery goes dead, have the alternator checked when replacing the battery so it doesn’t happen again.
What does it mean when your car makes a popping sound?
One of these not so welcome noises is a popping sound. A popping sound coming from your engine can be bad news. If you suddenly hear a loud pop or bang in the engine area, pull over to the side of the road and check it out. Be on the lookout for smoke or fire, two things you should never see under the hood.
Why does my car make a popping sound when I start it up?
The Fix: Check firing order and place wires on the correct spark plugs. The Symptom: Engine hesitates, and a popping sound comes from the engine. When you step on the gas, the engine bogs down or takes a second to respond. You may notice a general lack of power. The problem may occur when the engine is hot or cold or when you are low on fuel.
Why do I Hear No sound when I start my car?
When you try to start your car, you may hear no sound at all. This silence may be due to electrical issues: A discharged or failed battery A failed system component (for example, relay or safety switch)
What does it mean when your ATV won’t start?
The solenoid should make an audible “clicking” sound each time you hit the starter. If it does, you know it is getting power, and the problem is likely with the solenoid itself or possibly the starter.
Why does my car make a whirring noise?
A hasty solution may turn out to be more costly than it had to be. Here are some other engine sound issues to be investigated: The Symptom: Whirring from the engine that gets worse as engine speed increases, or any noise that increases or decreases with engine rpm. Possible Cause: Low power steering fluid.
I have a 2002 Venture. A month or so ago, it died while my wife was using it. After a lot of messing around, I discovered the plug that goes through the floor behind the driver’s seat was bad. I replaced it, and all went well for a while. Then it died again, (Thankfully in the yard this time). Both times the fuel pump was not kicking on.
What causes a Chevy Venture to overheat?
Motors can operate independently so I am still looking at the common line. thanks The main and auxiliary fans in my 2001 Chevy Venture have stopped working causing my van to overheat on occasion.
What causes a surging idle air control valve?
I changed the Idle Air Control Valve and checked the continuity of the wiring from the IAC Valve to the PCM (computer) and its fine. Usually a surging or high idle problem is a loss of vaccuum. or to much air entering the system through the throttle body. Mine was actually caused from the throttle body gasket.
What should I do if my Chevy truck dies?
One thought is if it seems fuel starved you may want to check EVAP system esp. vent and purge solenoids, after it dies, pop the gas cap and see if it feels like tank was pressurized. 9 people found this helpful. Start a new Chevrolet question.
What happens when engine heats up to operating temp?
As the engine heats up the ring-cylinder mate becomes looser so that the engine will run smoother and easier…but if there is too much wear the combustion gases will begin to blow by the ring-cylinder surfaces and will cause each stroke to lose power.
When does the battery light come on in a car?
First things first: if the battery light comes on in your car when you turn it on, you probably have nothing to worry about. Sometimes the battery light will come on when you start your car, but then the light will quickly flick off. If this is the case, pay it no mind.
What to do if your car battery light is not working?
Get the alternator or wiring fixed, and properly recharge the battery at the same time. The folks at AutoZone can always help with battery and charging system issues, both on the car, and with the parts off the car.
Why does my battery light keep coming on?
Probably one of the more common and easy-to-fix issues if your battery light comes on is a corroded battery cable. Sometimes battery cables also come loose. You can check your battery to see if this is the issue; if it is, the solution is to either clean your connections and retighten or replace the cables.
How long does it take for a battery light to go off?
The exact amount of time that your car will be able to function with the battery light on depends on many factors, but assuming that the alternator is the issue (this is the most common issue) it is likely that your car will lose battery power after 30 minutes to an hour of driving.
Why does my Chevy Venture jump out of gear?
I have a 1998 chevy venture,when you driving it it changes gear great and after about 20 min it start jumping out of gear..the motor just free spend…when you stop and cut the switch off about 5 min. when you start it back it work great again and you be going down the highway it jumps out of gear again…can some tell me what the problem is..
Why does my Car start after I release the key?
When you start your engine and release the key or stop pressing the starter button on a modern vehicle, the circuit is supposed to close, which will discontinue power to the starter motor. If the starter stays on after the engine has ignited, the main contacts in the starter relay have most likely welded together in the closed position.
What causes a car starter to not turn over?
However, when powered, it should send a signal to the starter relay once the key is turned or the starter button is pressed. If you press this button or if you turn the key on a manual ignition switch and the vehicle does not turn over, it may be caused by a problem with the starter relay.
Why does my car stall at low rpm?
The will likely force your computer to stall the engine and only allow it to run at low RPMs, which means the car will only move at slow speeds. This is a safety feature enforced by the computer so that your engine doesn’t get too damaged.
Why does my car stall after a few miles?
When a bad module is responsible for an intermittent stalling problem, the engine will usually cold start just fine and run OK for short distances, but stalls after driving more than a few miles or when driving at highway speeds (especially during hot weather). It’s as if somebody suddenly turned off the ignition.
Answer: This could be a problem of a failing fuel pump. This is pretty common on this truck. Normally this would cause the truck to sort of stumble before it stalls. If it just instantly shuts off like you are turning the key off, then it may be a problem in the ignition switch in the steering column, or an ignition control module.
Can a stalling engine be intermittent driveability?
Intermittent driveability problems of any kind are always a challenge to diagnose. When a customer brings you a vehicle and complains of a stalling problem, you may not have much to go on other than their description of what’s happening and when it happens.
When a bad module is responsible for an intermittent stalling problem, the engine will usually cold start just fine and run OK for short distances, but stalls after driving more than a few miles or when driving at highway speeds (especially during hot weather). It’s as if somebody suddenly turned off the ignition.
Why does my truck stall when I turn the key off?
This is pretty common on this truck. Normally this would cause the truck to sort of stumble before it stalls. If it just instantly shuts off like you are turning the key off, then it may be a problem in the ignition switch in the steering column, or an ignition control module.
What causes a car to have a high idle?
Usually a surging or high idle problem is a loss of vaccuum. or to much air entering the system through the throttle body. Mine was actually caused from the throttle body gasket. It had deteriorated over time, and started sucking in air from the back of the throttle body. 3 things come to mind.
What causes a car to idle rough at idle?
A clogged fuel filter stops the engine from receiving the right amount of fuel causing the engine to be rough idle. Fuel filters are often pretty cheap, and you can easily get the fuel filter removed and replaced from a nearby mechanic or do it yourself if you have some knowledge. 6. Dirty Air Filter
Is the EGR valve supposed to run during idle?
However, this EGR valve isn’t supposed to operate during idle, at wide open throttle or before the engine is warmed up. If it runs at any of these times, the performance of the engine is affected.