Question about 2000 Chevrolet Silverado

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Turn over but well not stay running backfires though air intake

2000 silverado 4.8

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  • Anonymous Nov 12, 2008

    i have same problem finally found intake manifold warped very bad replaced it with dorman intake manifold with green oring gaskets all solved



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When is the last time you replaced your fuel filter? Check your fuel filter. If it's plugged you may have taken out the fuel pump. This happened to me. (2000 Chevy Silverado 1500)


Posted on Nov 18, 2008


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Our oldsmoible silhoute has had many issues , we have spent $1800 trying to fix it

A backfire is usually an indicator of either timing or vacuum. Though you didn't include the year or engine size of your vehicle, the timing is not adjustable, and more than likely NOT your issue. This brings us to what it most likely is: Emissions System/ Vacuum/ Air Induction. The slower your vehicle goes (the less open your throttle is) the MORE vacuum there is present in the intake manifold. The faster your vehicle goes ( the wider open your throttle is) the LESS vacuum there is in the manifold. When you open your throttle, it lets more Air into the engine, which, in turn, displaces the vacuum. A vacuum leak allows air into the engine, which replaces the much needed vacuum for the car to run properly at idle and lower speeds. But when the vehicle is driving faster, the symptoms of the vacuum leak may not be noticeable, due to the fact that the engine is utilizing the extra air intake. The symptoms, however, return when the vehicle returns to idle. Using a 3/4" hose, you can put one end of the hose to your ear and probe the engine with the other end. Using the hose a stethoscope, listen for any "hissing" sounds coming from the intake or hoses, to detect a vacuum leak. Spraying Brake Cleaner / around the manifold, while the car is parked and idling, and listening for the engine to surge as the Brake Cleaner is being sucked into the engine, is one method that can be employed, though, I must say, with extreme caution. An open spark plug wire can cause the spray the ignite! There is also the option of having a smoke test done by a qualified technician, to locate a leak.
An Engine backfire is merely a condition where the cylinder in question has a poor air /fuel and spark ratio or timing. A leaking Fuel Injector can cause a backfire as well, such as the backfire that is present when too much starter fluid is used. First: get the codes pulled for your Check Engine Light for free at Autozone or Orielly's. Look for O2 sensors to be reading a Lean condition , which indicates a vacuum leak, or not enough fuel ( as in clogged injectors) if it a clogged injector, the code should say "misfire" and indicate which cylinder(s) has the issue. If the code has O2 sensor "Rich" condition, you are looking at too much gas being dumped into one or more cylinders, or not enough air. Though, by your description, it is more than likely a mere vacuum/ air issue.

Oct 18, 2016 | Cars & Trucks

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Does a 2000 Chevy Silverado 1500 4.3 motor have a intake air temperature sensor

Yes it does, it is located between the mass air flow sensor and the intake, you shouldn't have any trouble finding it.

Feb 22, 2015 | 2000 Chevrolet Silverado

1 Answer

2000 chevy truck k2500 running rough, no power and backfires. after replacing distrubutor assembly

Is the check engine light on, and have you checked base fuel pressure with a gauge ?

Jun 03, 2013 | 2000 Chevrolet Silverado

1 Answer

Adjusting Timing Chain

Push rod,you have two different size,or firing order is wrong. The intake push rod are 5 3/4 inch long, the exhaust are 6 inches long,Disable the spark and crank the engine the sound should be smooth and even,if its not correct the push rods.If it is correct the firing order

Mar 15, 2012 | Cars & Trucks

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Its a 1998 528i bmw that will start but wont stay running also there is a loud kind of backfire noise from one of the cylinders . the engine wont rev up proper even though i keep pressing the throttle...

The fact that you have a backfire noise that you can trace to just one cylinder makes it sound like a spark plug could be loose or broken. Pull out your spark plugs and examine them. On a '98, that eill mean pulling off the plastic cover, then removing the coils (need a 10mm socket, be careful with the ground wires) and then reach down in with a small spark plug socket on a long extension.
Also, look for a massive air leak on the intake. Take apart the air tubes from the air filter up to the throttle body looking for air leaks. You could also have a leak at the intake manifold gasket but you may need help to check for that.

Mar 25, 2011 | 2008 BMW 528i Sedan

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2000 silverado 4.8 v8 runs bad when it is cold out side.

Try replacing the coolant temperature sensor for the injection system.

Jan 05, 2009 | 2000 Chevrolet Silverado

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