Why does my 2002 Chev suburban vibrate when idle?

My 2002 Chev Suburban has a slight tremor or vibration when it is idle or at a red light. I have replaced the plugs, and added gas treatment, but it still vibrates. It noticed it right after a fillup with 87 octane gas, and wonder if it is a gasoline issue.It has 52k miles on it, and otherwise runs great.

What causes the spark plug to short out on a car?

Ignition coils and spark plug wires convert the low voltage power from the battery into the high voltage necessary to jump the spark plug gap. As ignition coils and wires wear, they may lose insulation and short out. When this happens, sufficient voltage may be unable to reach the spark plugs, causing misfires.

When did my Chevy Suburban start stalling out?

We purchased it from a Chevy dealership back in 2002. It was a GM buy-back, for the same reasons it’s now having. NO DTC’s, NO CEL. Having a problem with stalling. It usually happens after backing out of parking areas when vehical returns to idle while shifting from reverse to drive.

What kind of engine does a Chevy Suburban have?

My 1999 454 7.4 liter suburban LT turns over several times when cold before spluttering into life ( it then nees a bit of gas) and Idles roughly. i think it may have a slight missfire. is this a common problem.

Why does my car sputter when I Turn on the engine?

The fuel filter ‘s job is to filter the fuel going to the fuel injectors and then enter the engine. A clogged fuel filter can cause the engine to get too low fuel pressure or cause a clogged fuel injector. Low fuel pressure will cause the engine to run very leanly, and therefore it may cause the engine to sputter.

Is the Check Engine light on during rough idle?

At times, the check engine light will activate during the rough idle. Sometimes the light flashes and goes off after a half hour or so, and sometimes it will come on and stay on for as much as a day or two. The burb always runs fine after warming up, even if the light stays on.

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

When does a Chevy Suburban stall at low idle?

Low idle engine stalls occasionally. RPMs are at 500 dipping to 400 but they should be around 600 to 800 I believe. My truck was stalling and shutting off at stop signs or red lights. I had the throttle body clean and had no more issues. My Chevy suburban just stops when turning or at a stop.

Why does my Chevy Suburban stop at a stop?

My Chevy suburban just stops when turning or at a stop. Ours will say traction control off, stabilitrack off, and then say reducing engine power. It also can not sit and warm up or it will die. We have been waiting on a new throttle body for over two weeks.

Where is the throttle position sensor on a Chevy Suburban?

Your Chevy Suburban uses a series of complex sensors to report what is going on to the ECU. The ECU then uses this information to adjust the timing, air fuel mixture, and more. When one of them goes wrong, it can lead to stalling for sure. Throttle Position Sensor – The throttle position sensor is typically located on the gas pedal.

Can a surburban have a rough idle on cold start?

Fry- I have an ’02 Surburban that has a rough idle on cold start. Typically, the temps have to be 40 degrees or below for this to occur. It never happens during the warm spring, summer and fall months.

What kind of engine does a 1999 Silverado have?

Problem vehicle, 1999 Chevrolet Silverado 1500 5.3L V8 2WD with 351,000mi. I’ve read numerous threads on the rough idle cold start and the engine having some sort of intake leak and I don’t believe I have this problem, but I could be wrong.

Why does my Chevy Suburban stop while driving?

Battery is fine because all power still works. After waiting ten minutes or so will start again only to drive a few miles and engine stops again. Any clue? I am working on a 95 with a 5.7 engine.

What causes a Chevy Suburban engine to stall?

Stumbling and poor idle can be caused by air or fuel starvation so make sure that those filters are OK. I think that my own problem is caused by dirt in the fuel tank plugging up the fuel intake screen. I think the dirt falls off when the engine is shut off.

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.

Battery is fine because all power still works. After waiting ten minutes or so will start again only to drive a few miles and engine stops again. Any clue? I am working on a 95 with a 5.7 engine.

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

Why is my Chevy Suburban bogging down on hard acceleration?

I have a 97 Suburban 5.7, 2wd. On hard acceleration it is bogging down like there is to much air, because sometimes it backfires. Or a plugged exhaust. I replaced the fuel pump-because it was bad in July.

Why does my Chevy Suburban stall after backing out of parking areas?

NO DTC’s, NO CEL. Having a problem with stalling. It usually happens after backing out of parking areas when vehical returns to idle while shifting from reverse to drive. It then become difficult to restart. Also during this issue if vehical doesn’t stall it starts exibiting erratic idle.

Why does the Check Engine light come on when the engine is idle?

The check engine light in your vehicle is designed to turn on if the Engine Control Unit (ECU) identifies an issues with how the engine is running. Look at your dashboard; if the check engine light is on in conjunction with idle issues, it may be because the idle control valve is malfunctioning.

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.

What causes a flashing check engine light on a Chevy Suburban?

While a majority of the time, the flashing check engine light is going to be caused by a misfire related to your Suburban’s ignition system or fuel system (as stated above), there are other issues that can cause it. Your timing chain could have jumped.

Why is the ignition not working on my Chevy Suburban?

EGR- The EGR system recycles burnt exhaust gasses back into the combustion chamber. Crank/Cam Sensor- When the cam or crank sensors are not being read by the ECM/PCM, it’s impossible to get the ignition timing right. If you Suburban does start at all, it’ll run rough.

Why does my 2002 Chev suburban vibrate when idle?