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Low fuel pressure n backfire - Chevrolet Cars & Trucks

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Clogged fuel filter maybe.

Posted on Oct 26, 2012

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Cranks but won't start just backfires

Sounds like ignition timing is out, far to advanced or 180 degrees out...

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I have a 2002 grand am se with a 2.2 eco tech and I replaced the fuel pump and now it backfires and won't stay running what's the problem

Check the fuel pressure at the fuel rail. If fuel pressure is too low, or if performance is lost under load, replace the fuel filter. If the problem persists, replace the fuel pressure regulator.
Is your CHECK ENGINE light on? Check ODB codes.

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95 chevy 1500 pops and backfires doesn't want to shift into overdrive when cold when it does the truck runs real rough

Have you checked the fuel pressure under a load, low pressure will cause these symptoms. The test port is on the top of the engine in the fuel supply rail to the fuel injectors, the fuel pressure test port looks like a large tire fill valve. You will need a fuel pressure test gauge to do this test (about $20), the pressure must be watched while you accelerate, it should never go down on hard acceleration just up about 6-8 PSI

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I'd have fuel pressure tested, and if low, try changing fuel filter , if no improvement in pressure, change fuel pump. Pressure test will at very least confirm you have necessary pressure to supply engine as required.

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Car starts and cuts off rigth away when u push the gas it backfire sometimes

Sounds like the fuel pressure is too low,replace the fuel filter,if this does not help,have the fuel pressure checked,the fuel pump might be at fault.

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My car backfires through carb from dead stop acceleration, what may be the cause?

wrong ignition timing, low fuel pressure or burn valve.
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Apr 21, 2010 | 1993 GMC Sierra C3500

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1993 f150 302 startes fine idels fine backfires when taking off

engine can be out of time
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or can be a burn valve
need to check ignition timing and fuel pressure to see if they are ok first

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My car sputters when i press the gas and it backfires

backfiring is a sign of low fuel pressure. sputtering is a sign of a misfire, You should have a code stored. Get the code to further diagnose

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1 Answer

Low power,backfiring at times &trans. slipping at times.

ck fuel pressure, ck fuel filter, usually backfiring is a fuel problem ck that first.

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most likelly it is your fuel pump is not puting godd fuel pressure
have the fuel pressure test and if it is low have the fuel pump and filter replaced

May 28, 2008 | 1990 Buick Regal

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