What does it mean when your engine idle is too low?

If your idle is too low, it could be the IAC not talking to the computer correctly. Disconnect the IAC connector for a couple seconds while your engine is idling. If your engine idle didn’t change, you can suspect it to be the IAC. If it is working properly, unplugging it would cause your idle to freak out.

How can I tell if my idle control motor is working?

Look for a difference in idle speed. Allow the engine to run for a minute so it settles to a consistent idle, then take note of any difference in the idle RPMs versus the idle you observed earlier. If the idle has not changed at all, it’s likely because your idle control motor has not been functioning.

What causes idle surges on a car ECM?

Idle surging can be caused due to other issues in the car, but if it happens in conjunction with other throttle position sensor symptoms, the culprit is often the TPS. At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges.

What causes rough engine idle or TDC code?

So, should the engine misfire, rough engine idle or (TDC) code; point to an air leak in the intake manifold gasket, following the below directions. A very common cause of a leaking intake manifold is the gaskets and bolts used from the factory.

What should resistance be for idle control motor?

Connect an Ohm meter to the two and measure the resistance between them. Fords are designed to operate with the resistance in the solenoid in a range between 7.0 to 13.0 ohms. If the resistance is outside that range, the idle control motor needs to be replaced.

How can I increase idle speed in a Chrysler?

If the resistance is outside that range, the idle control motor needs to be replaced. Use a bidirectional scan tool to increase idle speed in a Chrysler. Connect a bidirectional scan tool to the same OBD port you would plug a code scanner into. Use the command in the scan tool to increase the engine’s idle.

What happens when you idle the air control valve?

Normally, if you just start your car, the idle air control valve will cause the engine rpms to increase and slowly decrease. That would be a sign that your IAC is working.

Can a bad idle control valve cause stalling?

This is controlled by the engine’s computer. Sometimes parts go bad, which results in your car idling strangely or stalling. Check to see if your idle control valve is functioning properly before attempting to replace it. Look for a high engine idle. A common symptom of a faulty idle control valve can be a high idle.

What’s the idle RPM on a Silverado Silverado?

Re: high idle PLEASE HELP!!! When i pull the vac line from the booster the idle rpm stays at the 1200 I had been idling for 2 yrs. It only runs rougher but maintains 1200. When I pull the same line from the back side of the intake she revs really high. Enough to scare you so I plugged it back in really fast.

When does the idle air control valve change?

When the engine is running but the vehicle is not moving, this means the engine is idling. During this time, the number of revolutions per minute (RPM) inside the engine will change. The idle air control valve is responsible for managing the engine idle speed.

What happens when the idle control motor is disconnected?

With the Idle Control Motor disconnected, get back into the vehicle and start the engine again. The engine should still start and run without any issue despite the idle control motor being disconnected. Be sure to tuck the wiring you disconnected up in the engine bay so it doesn’t get caught in any moving parts.

How can I tell if my idle control valve is working?

To check if an idle control valve is working properly, start by turning on your engine and letting it run for a minute or 2. Then, when it’s at an idling speed, take note of the RPMs in your car. Next, turn the engine off and disconnect the idle control motor under your hood.

How can you tell if an idle air control valve is working?

Disconnect the IAC connector for a couple seconds while your engine is idling. If your engine idle didn’t change, you can suspect it to be the IAC. If it is working properly, unplugging it would cause your idle to freak out. Also check the wires going to the IAC connector.

What are the symptoms of a failed PCV valve?

So, a failed PCV valve or related component can produce a number of symptoms. For example, if the valve gets stuck in the closed position or clogs; you’ll notice one or more of these symptoms: Increase in internal engine pressure Failure of one or more oil seals or gaskets Moisture and sludge buildup inside the engine

How long does a warm engine idle for?

With a steady throttle, it fluctuated between 3 and 3.5 for a couple mins, then bogged out and stalled. Next time I started it, it went to 2k intially then started hunting between 1k and 1500, with about a two sec interval. After a couple mins, fluctuated around 750, but not steady.

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 there a problem with rough idle when warm up?

So, once there’re visible signs of rough idling, trouableshoot the problem without causing any further delay. As reported by Car From Japan experts, most Makes getting this engine rough idle after warm up are: Though the problem is not common but drivers of the Makes had their car serviced at garages for Rough Idle When Warm.

Why is the exhaust gas recirculation valve on at idle?

The Exhaust Gas Recirculation Valve is a vital emission control device. It allows the exhaust gas to enter into the intake manifold, with the sole purpose of reducing emissions from the motor. However, this EGR valve isn’t supposed to operate during idle, at wide open throttle or before the engine is warmed up.

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.

Where is the idle control valve on a car?

Most idle control valves come in the form of a motorized valve or motor that is mounted somewhere on the vehicle’s intake manifold. The valve or motor is controlled by the engine control module, which will adjust the idle speed according to parameters such as engine temperature and electrical system load.

What to do when your car is at high idle?

While observing the valve with a flashlight, turn the key to the “ON” position, (DO NOT START ENGINE.) the valve should move slightly. Step 3 – Engine vacuum is a sealed system and must hold a specific amount to maintain proper idle conditions, inspect the engine vacuum hoses and intake gaskets.

What kind of car is a 1992 Chevy Blazer?

Description: Used 1992 Chevrolet Blazer Silverado with AWD/4WD. Frankman Motor Company has updated its operations procedures due to COVID-19.

What is the TBI code on a 1990 Chevy truck?

Consult a service manual or see below for any check engine light code definitions. You can use a late 80’s or early 90’s GM TBI definition. If you have access to a scan tool use a hook up for a 1990 350 cu. in. 5.7L Chevrolet truck. For some scan tools enter VIN 10th“L” 3rd“C” 8th“K”.

Where can I buy a 1996 Chevy Blazer?

Description: Used 1996 Chevrolet Blazer with AWD/4WD, 5000lb Towing Capacity. WELCOME TO BICKMORE AUTO SALESALWAYS OVER 200 VEHICLES TO CHOOSE FROM!COME AND CHECK OUT OUR BIG VARIETY OF VEHICLES LIKE THIS 1998 CHEVY BLAZER!3 MONTH OR 3,000 MILE LIMITED SERVICE CONTRACT AVAILABLE FOR ONLY $0.99!

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

How is the idle speed of an engine controlled?

The valve or motor is controlled by the engine control module, which will adjust the idle speed according to parameters such as engine temperature and electrical system load.

What kind of gas does a Dodge Neon use?

Never had any major or minor problems. Just did normal maintenance but always used Mobil 1 at 3000 mile change intervals. Still uses no oil to speak of. Still just as good on gas…

Is the Dodge Neon High Line for sale?

None I can think of. I ordered a Neon High Line with 4 wheel anti-lock disc brakes, traction control, tachometer and 5 speed manual transmission for my daughter’s 16th birthday. Finally going to sell it, since we don’t need it anymore. Its been a great car.

How many reviews does the Dodge Neon have?

We’re sorry, our experts haven’t reviewed this car yet. Check back with us soon. Showing 3 of 1,243 reviews.

What should I do if my idle control motor is disconnected?

The engine should still start and run without any issue despite the idle control motor being disconnected. Be sure to tuck the wiring you disconnected up in the engine bay so it doesn’t get caught in any moving parts. Look for a difference in idle speed.

What causes the idle speed to randomly fluctuate?

It will cause the idle speed to randomly fluctuate to different speeds rather than stay at one constant speed. The idle speed may be too high at one moment and then too low at other moments.

What are the symptoms of a bad idle air control valve?

Below are the top 5 symptoms of a bad idle air control valve which you will easily notice. Since the idle air control valve is supposed to manage the idle speed of the engine, a bad valve will certainly throw that out of whack. It will cause the idle speed to randomly fluctuate to different speeds rather than stay at one constant speed.

What does it mean when your engine idle does not increase?

Use the command in the scan tool to increase the engine’s idle. If the engine idle does not increase, it means there is an issue at the idle control motor of its circuit preventing the signal from changing the idle. You can purchase a bidirectional scan tool at your local auto parts store.

What to do when your F150 stalls at idle?

Reconnect the battery and start it w/o touching anything. Allow it to warm at idle and then move odle paramaters. Drive it around town a few miles and see if all is well. If not, there are some other things that

It will cause the idle speed to randomly fluctuate to different speeds rather than stay at one constant speed. The idle speed may be too high at one moment and then too low at other moments.

How to reset the baseline idle speed in a GM TBI?

Turn the screw to adjust the idle speed to 650 RPM +/- 50 RPM. Turn off the engine and disconnect the negative battery terminal from the battery using a wrench. Reconnect the IAC valve. Reinstall the air cleaner and remove the paper clip from the ALDL connector. Reconnect the battery terminal after 5 minutes and test drive the vehicle.

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 to do if your 350 won’t go down?

Assuming you adjusted the idle screw I would make sure the throttle cable or the gas pedal isn’t hanging up somewhere since you’ve had the problem with 2 different carbs. Try removing the throttle linkage and see if the idle goes down. If it doesn’t then you have a problem with the carb and/or intake. Good advice, thank you.

Why does my 350 rpm not go down?

Yes, it’s supposed to go down after it warms up… but if that fast idle screw isn’t adjusted right… well, there is a lever that the fast idle screw controls along with the choke… and if it’s out of adjustment, won’t allow the choke to work the lever up as it should to allow the rpm’s to drop when warm.

What causes a car to have a high idle?

At this point in time it doesn’t hurt to give it a shot though. Make sure you do not have a busted diaphram inside the brake booster. This could cause a high idle also. Infact, any vacuum leak could cause a high idle. I had the same problem with a new Holley. i had a major vacuum leak as discussed above.

What does it mean when your car stalls at idle?

If the Engine Stalls at Idle Unless You Press the Accelerator IV. If the Engine Starts When Cold but Stops When Warm V. If the Engine Stalls Intermittently I. If Your Engine Stops Immediately After it Starts Your engine may stop as soon as you let the key return from the Start to the Run position.

What should the rate of revolutions be on an idle engine?

When you start your engine, and just let it run without pressing on the accelerator or putting it into gear, that is idling. A properly idling engine should be able to maintain a steady but low rate of revolutions, somewhere in the vicinity of 1,000 RPM. Your tachometer needle should be steady and not jumping around.

What does rough idle mean on a GMC Sierra?

rough idle, stalling, loss of power. o2 sensor code 44 (lean) Replaced: coolant temp sensor, tps, map sensor, fuel filter, and o2 sensor. It will run normal on occasion but only lasts about 45 seconds or so.

What causes a car to run at a rough idle?

A PCV valve leak can cause the air-fuel mixture to run too lean, and this will cause a rough idle. Proper periodic servicing of the PCV valve will prevent this situation from occurring.

What does it mean when your car is idling?

Let’s start with a definition of idling. When you start your engine, and just let it run without pressing on the accelerator or putting it into gear, that is idling. A properly idling engine should be able to maintain a steady but low rate of revolutions, somewhere in the vicinity of 1,000 RPM.

What causes a Chrysler 2.7 liter engine to fail?

This type of catastrophic engine failure would not typically be expected anytime before a vehicle reaches 100,000 miles, yet Chrysler has been denying engine warranty coverage since the problems are caused by a build up of oil sludge.

When does a car have a rough idle?

November 27, 2017. It’s easy to tell when your car has a rough idle: When you start the engine, it won’t run at a steady rate. It may almost stall, or it may run at varying RPMs without your putting your foot on the gas, or it may do both.

What does it mean when your car is stalling at idle?

Problems with idle speed —things like slow idle, fast idle, rough idle, or stalling after idling for a few seconds—are symptoms that something is wrong with your engine. These should be investigated, diagnosed, and repaired as soon as possible.

Why does my vacuum have a rough idle?

Leaks in these hoses and in other parts of the vacuum system can be another cause of a rough idle, often because of a lean air-fuel mixture from excess air entering the system.

What to do when your car engine is idling?

Idling issues can be frustrating, but with some patient troubleshooting, you’ll have a real chance at figuring it out. Remember to always check your engine idle with the air conditioning and defroster turned off, as both of these systems are designed to change the idle when they are on due to the demands they place on the engine.

How can I get my Dodge Ram to idle up?

4. Get a can of injection cleaner and lightly spray inside of throttle body around the plate/below the throttle body is a smile-like opening, get a flat head screwdriver and wrap it with a clean cloth and stick it in there and wipe inside of that compartment. 5. Start engine and slightly idle up 30 seconds). 6.

Can a faulty idle air control cause a problem?

A faulty idle air control (IAC) valve can cause a number of problems with your vehicle: 1. Incorrect idle speed: An IAC valve that sticks in the closed position will create an idle speed that’s too low.

Why does my Dodge Ram stall at 700 rpm?

Lately, when I start the engine it surges, (i.e. revs to about 1500 RPM then idles back to about 700 RPM). It will fluctuate back and forth for a bit before idle finally smooths out. Is this a sensor problem?

Where was the 3.9 V6 Dodge truck engine built?

Head of engine tuning Pete Hagenbuch remembered, “The 3.9 which was built in Mound Road, on the machining equipment which included a 90 degree bank angle. It was another one of those boom-boom, boom-boom type engines.

What should the rate of revolutions be on an idling engine?

A properly idling engine should be able to maintain a steady but low rate of revolutions, somewhere in the vicinity of 1,000 RPM. Your tachometer needle should be steady and not jumping around.

Why does my Dodge Ram idle and stall?

Have a 02 5.9 1500 3 out of 5 times after starting minutes later it idles rough and sometimes stalls. If you floor it she gets up and goes during the problem or if you pump the peddle it goes. After a few minutes of running like that its fine no problems.

Can a bad throttle position sensor cause idle surging?

What to do if your Dodge engine is not running?

If you do not get any voltage reading, there is an open or short in the circuit. Turn off the ignition switch. Check the TPS sensor resistance. Unplug the sensor electrical connector. Using your ohmmeter, check the sensor resistance by back probing the supply and signal wires at the sensor.

How to fix a Dodge engine hesitation problem?

How to Fix a Dodge Engine Hesitation Problem 1 Park your Dodge vehicle in a safe place and open the hood. 2 Remove the air cleaner assembly from the top of the engine and locate the TPS sensor. 3 Check the supply voltage to the sensor. 4 Check the TPS sensor resistance.

What causes an uneven idle on an F-150?

A uneven idle on a F-150 can be a symptom of a variety of engine issues such as vacuum leaks, failed or dirty sensors or worn engine components. If the engine is older or has higher miles on it, the typical culprits will be dirty sensors and carbon deposits on engine head components.

How to troubleshoot an idle that is going up and down?

Finding the ultimate cause of an uneven idle can be a trial and error process, but a cost-effective way to cure your F-150’s idle problems is to start by cleaning specific components to see if this restores a smooth and even idle prior to replacing components.

What does it mean when your car is idling but not running?

When the engine is running but the vehicle is not moving, this means the engine is idling. During this time, the number of revolutions per minute (RPM) inside the engine will change.

What causes a fuel pump to die at idle?

A clogged filter for example can be overcome with excessive throttle that drives the fuel pressure up enough to force it through, but it will barely trickle at idle and stall. Usually the dead give away for fuel pump is when someone complains they have to floor it as soon as it turns over or it will die right away… ick! Click to expand…

When does an idle air control valve malfunction?

As soon as you start your car, the idle air control valve will immediately malfunction. If you happen to be away from home and this happens, the stalling will happen every couple of minutes in the beginning. You should be able to make it to the nearest mechanic in time before the engine stalls completely.

When is a bad throttle position sensor a warning sign?

Engine won’t idle smoothly, idles too slowly, or stalls If you start to experience engine misfires, stalling, or rough idling when the car is stopped, it can also be a warning sign of a failing TPS. You don’t want to wait to get this checked out!

What happens to your car when you idle?

A rough idle will result in intense vibrations forming whenever your vehicle is stopped with the engine running. Since less air will be going into the engine during its idle state, the car will react by shaking profusely.

What are symptoms of failing Idle Air Control ( IAC ) valve?

Symptoms of a failing idle air control valve. A faulty idle air control (IAC) valve can cause a number of problems with your vehicle: 1. Incorrect idle speed: An IAC valve that sticks in the closed position will create an idle speed that’s too low.

Where is the idle air control valve located?

The IAC valve is used to control your engine’s idle speed and prevent it from stalling. It accomplishes this by controlling the amount of air that gets around the throttle plate and enters the engine. Typically, the IAC valve is mounted on the throttle body, which is seen in the diagram.

When is the p0507 idle air control system higher than expected?

In this case, the P0507 DTC (diagnostic trouble code) is triggered when the PCM (powertrain control module) detects an engine idle speed that is greater than the desired (pre-programmed) RPM.

What should the idle RPM be on a car?

Your engine should normally get to around 700 RPM after you start the vehicle, depending on the model. If your idle is way off and you have one or more of the problems listed above, then you will want to diagnose the issue right away.

Why does idle speed drop during cold startup?

If the idle air control valve did not compensate for these, the idle speed would drop when certain accessories are used. In severe cases, the engine may even stall. The idle air control valve is most important on a cold startup. Problems with the idle air control will be most obvious during this time.

What causes high idle speed on Ford F-150?

Hi Everyone: Today we have this F-150 with a high idle concern that has been to a local Ford Dealership 3 times and the customer still has the same problem. During the diagnostic procedure I found the throttle plate is sticking and there is a huge gap on the spring side of the throttle plate causing the idle concern.

What does idle air control valve on Ford F-150 do?

Its strength comes in part to a fully functioning engine. When the idle air control valve for Ford F-150 doesn’t properly control the amount of air that reaches the engine, it leads to problems that affect your truck’s performance. The Ford F150 idle air control valve regulates how much air passes into the engine to mix with the fuel.

When to replace idle control motor in Ford?

Fords are designed to operate with the resistance in the solenoid in a range between 7.0 to 13.0 ohms. If the resistance is outside that range, the idle control motor needs to be replaced.

What should the idle speed be on a 1996 F-150?

Engine running, check for leaks, nope, all looks good. On fast idle, thats Ok. Few seconds, and good, I hear it ease on down to normal idle. Playing some seeming “new” problem. When I tap the gas, 8 seconds, then eases down to normal idle of 700-800.

Fords are designed to operate with the resistance in the solenoid in a range between 7.0 to 13.0 ohms. If the resistance is outside that range, the idle control motor needs to be replaced.

What causes idle surge on Ford F 350?

Experience: 23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs The likely cause of your F 350 having an idle surge is due to eaither a bad Injector pressure Regulator or a bad Injector control pressure sensor. See attachment for testing.

Why does my 1990 Ford F250 stall at low rpm?

My 1990 F250 runs rough and stalls at low rpm when cold. I installed new cap, plugs, rotor and plug wires. Any suggestions? Could it be a sensor?

What to do if your Ford engine is running at idle?

Hook up a portable trouble code tool for your specific Ford make and model. Look for any trouble codes that appear while the engine runs at idle. Write down any code number and look it up in a trouble-code manual. Most times, code numbers can pinpoint the exact system failure or miss in the engine.

Why does my Ford F 250 engine bog down?

I have a 2000 Ford F-250 with a 5.4 liter engine. It gets very poor gas mileage and bogs down when you try to accelerate. I have had it looked at by a mechanic and I asked if it could be related to the catalytic converter or the fuel injector.

Why does my Ford Mustang idle at 800 rpm?

The car had underdrives on the crank and waterpump before I bought it and the volt gauge does not go up until about 1000 rpm. Even with this the car would idle before at 800 rpm. When I added the parts in the sig, the engine would not idle at all. The car died every time it came to a stop.

Why does my Ford F Series engine backfire?

When the truck is started, idle is up around 1500 RPM, and it starts to settle down, once it hits about 800RPM it begins to backfire and the engine literaly jumps around in it’s mounts (very bad misfire). I recently replaced spark plugs, ignition wires, distributor cap & rotor, and the car continues to behave in the same manner.

Why does my Ford Ranger have a rough idle?

While there are a variety of reasons your Ford Ranger has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil. See what others are asking about their Ford Ranger. Get answers from RepairPal’s community of auto experts and enthusiasts.

Why are the spark plugs on my Ford Ranger not working?

Spark Plugs – One of the absolute most common causes (if not the most common reason that your Ranger may be misfiring) is the spark plugs. Although most modern vehicles use iridium spark plugs, they still need to be changed at the manufacturers recommended interval.

Why does my Chevy Silverado have rough idle?

An internal combustion engine needs air, fuel, and spark in order to achieve ignition. When one or more of these variables is off it can lead to a rough idling condition. Most of the time the culprit is going to be the ignition system, although there are a myriad of other causes. We’ll cover the most common causes of rough idle below.

What are the sensors on a Ford Ranger?

The oxygen sensors that are equipped in your Ford Ranger are responsible for monitoring the exhaust to help the ECU determine the correct air/fuel mixture. Of all the sensors equipped in your vehicle, the O2 sensors may have it the hardest. They deal with super hot exhaust that can cover them in deposits that can leave them ineffective.

Why is my Ford F150 stalling at idle?

Recently we came across a 2005 Ford F150 with a 5.4 liter engine that was stalling at idle and had a surging condition at lower engine rpms. First thought was to pop the hood and look and listen for vacuum leaks which we did as this would be the most common cause of this idle and surging condition.

What does rough idle mean on a Ford F150?

I have a rough idle (it will stall when stopped). This will happen for a few days then run great for a few days. When it is happening the truck still has plenty of power, runs fine during acceleration but dies shortly after I let off gas.

What kind of engine does a 1989 Ford E-150 have?

I’ve got a 1989 Ford E-150 conversion van has developed a stalling problem. It has a V8 5.0 engine. When the problem first occurred I felt the engine stutter and pulled off the road and as I rolled to a stop it stalled out.

What causes a Ford F-150 engine to turn off?

5.4 Triton Engine Failure of the Fuel Pump Driver Module This problem is typical for the Ford F-150 with a 5.4 Triton engine. Failure of the fuel pump driver module usually cuts off the petrol feed to the engine which, of course, causes the engine to turn off, thus cutting power to all essential systems.

Is the idle air control spacer off in a 1990 Ford F150?

The idle air control spacer is off now but when it was on it did idle the same, I did mess with the adjustment but it did not help the problem it only raised or lowered the idle. helpful? Ok the code 44 is part of the smog system however it is not related to your problem. Sense you have a scanner then you can check out sensors live right?

Why does my car idle at 700 rpm?

There is an air filter which prevents debris from the air from getting into the chamber. But if this air filter is dirty or clogged, then there will be less clean air passing through it. This will cause the engine to idle rough. Your engine should normally get to around 700 RPM after you start the vehicle.

Can a rough idle cause an engine to stall?

When does a Mercury Mountaineer start stall idle?

Amazing I have a 2002 Mountaineer V8 with the same issue, started 3 yrs ago. Mercury/Ford claims they have never seen this before. Mainly stalls when car comes to a stop sign in the mornings, never had a high speed stall. I have replaced fuel filter and air control valve.

What should the RPM be on an idling car?

When you start your engine, and just let it run without pressing on the accelerator or putting it into gear, that’s idling. A properly idling engine should be able to maintain a steady but low rate of revolutions, somewhere in the vicinity of 1,000 RPM.

Why does my GMC S15 stall at high idle?

In looking at the fuel injection, I can see the injectors stop injecting fuel. After it dies, it is very hard to restart unless it is left alone and cools a bit. If the IAC is unplugged, the engine will run at high idle fine. When plugged back in, the correct idle resumes and it may run a few seconds or a minute before it dies.

What kind of engine does a 1995 Sonoma have?

I’ve got a 1995 Sonoma with the 2.2 and it suddenly quit while I was driving on the interstate at about 70 mph. I got it home via AAA and found I had plenty of fuel pump pressure as well as spark.

What happens when the EGR valve gets stuck on a GM 4.3L?

This tutorial addresses a very common problem I’ve seen on the 1987-1995 GM 4.3L, 5.0L, and 5.7L engines with throttle body fuel injection system: a stuck open EGR valve. And when the EGR valve gets stuck open, it’ll cause a rough idle condition that may hard to diagnose.

What does it mean when your engine idle is too low?