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Backfires thru the exsaust & will not start - 1996 Chevrolet Impala SS

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Sounds like either your plug wires have been mixed up and aren't to what cylinder they should be or the timing is off.

Posted on Oct 27, 2012


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Backfire when starting

Cars haven't had carburetors since 1985 some 29 years

To backfire thru the intake, you can't use the car,has to be
a timing or valve problem,probably a mechanical failure

Mar 24, 2014 | 1999 Chevrolet Malibu

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Wont start in 38 deg and colder ?

Will it start if you use starting fluid to boost fuel supply ?

Jan 23, 2014 | Ford Ranger Cars & Trucks

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1988 oldsmobile ninety eight only runs rough @backfires

Worn Timing Gear & jumped a tooth or two
Check that out
If you rock the crank back & forth with a long
ratchet,with the distributor cap off & the rotor
doesn't move right away then you maybe on to that issue
The fix is to remove the side subframe bolts & lower it
enough to get your puller on & the damper off
You could try using a timing light on # 1 wire &
then on the one half way thru the firing order
The timing should be close with either
Crack the throttle & watch the reaction of timing
Point here is backfire is most likely some type of
timing issue,could be combined with other issues
that contribute
I assume the spark plugs are not more than 3 years old
& you have cleaned up the rotor & cap
The plugs wires last some times 15 years,but not forever

Jul 23, 2013 | Cars & Trucks

1 Answer

Won't start after sitting for a few days

Could be loosing fuel pressure thru the pressure regulator or the valve in the fuel pump. The pressure should hold for several days when the engine is off.
I would have the fuel pressure tested before and after you try to start the engine.

Sep 29, 2012 | 1996 Chevrolet Tahoe

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I have an 89 buick 3.8 that misses and backfire thru the intake

HAVE TIMING CHECKED. Timing chain may have jumped.

Dec 18, 2011 | 1989 Buick Park Avenue

1 Answer

Have code p0300 active just replaced fuel pump, all spark plugs, wires, cap, and rotor, engine back fires, and has explosion in the air filter area

Code p0300 is multi- misfires [ any number of the cyinders ]. Sometimes when a fuel pump is replaced, the system will have air inside and will mis & backfire untill the air is cleared back thru the return line, or blead out the test port. This will set the p0300 code. It's rare to have a backfire bad enough to have an explosion, bleed the lines thru the test port untill you see no more bubbles comming out.

Jun 28, 2011 | 2003 Chevrolet Silverado 1500

1 Answer

96 corsica, starts,& runs but sputters & sort of backfires thru the intake, also lacks power. was fine one day acted up some the next, now its doing it all the time

plugs and leads ?? change them first ,right this is last question tonight because er indoors moaning iam spending too long on here

Apr 19, 2010 | 1996 Chevrolet Corsica

1 Answer

Have replaced fuel pump, relay & fuel filter.

have you checked to see if you have a bad came or lifter. that would make it backfire. if it kind of spits fuel it maybe cam. if it throws fire than it could be timing like a bad chain.

Feb 12, 2010 | 1986 Chevrolet S-10 Blazer

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