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Backfires out intake and exhaust

Won't start just backfires

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  • Cars & Trucks Master
  • 2,007 Answers

You don't state what kind of vehicle or what engine, but it is either coil, or wires, or timing. If it's a GM product, start by changing the coil.

Posted on Feb 12, 2012

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Posted on Jan 02, 2017

  • 14585 Answers

SOURCE: 2001 ford taurus, 3.0 vulcan

Back firing out of the intake is because the valves/cams are not set right. When you did the timing belt . did you set the crankshaft mark at top dead center of the compression stroke. If it's at the exhaust stroke this would cause backfiring and violent shaking.

Posted on May 23, 2011

jaysonemanme
  • 500 Answers

SOURCE: my 96 crown vic police interceptor, cranks

starting fluid is a thing of the past. dont use it. this car doesnt have a carb, its a throttle body/ electronic fuel injection system. you most likely have a fuel pump or fuel pressure regulator issue. test the fuel pressure, should be anywheres from 35-50 psi

Posted on Oct 11, 2011

  • 946 Answers

SOURCE: 1989 oldsmobile cutlass ciera car starts but won't stay running it sputters and backfires and dies

Like Ron says,timing chain is possibility,usually only above 150,000 though it can happen sooner.
I'm wondering if it has a crankshaft position sensor?
don-ohio (:^)

Posted on Nov 23, 2011

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2 Answers

Have a 1991 Buick Lasabre won't start and backfires very very loud


backfire is a timing issue ,if its to far advanced it will back fire out intake ,if it backfires out exhaust its to far retarted ,you may have a bad timing gear,and or chain or belt, start by checking timing if you can get it running infact go over ignition system to look for other problems

Jul 08, 2015 | Buick Cars & Trucks

1 Answer

Won't start


If it's backfiring through the intake, then more than likely it's a timing issue. The distributor cap has the cylinder numbers molded into it where the plug wires go... Make sure the wires are in the right spots. If that's good, then it's possible the distributor isn't lined up right.

May 10, 2013 | 2001 Chevrolet Chevrolet Blazer

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05 astro backfires and wont start


backfire out exhaust or intake?

Feb 16, 2013 | 2000 Chevrolet Astro

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1993 chevy corsica backfires


I think you have a valve problem. Need to remove valve covers and look for loose or broken rocker arms. If an exhaust valve does not open because the rocker is broken the trapped combustion gasses will revert through the intake when the intake valve opens. This can interupt the intake flow to other cylinders and prevent starting.

Nov 27, 2011 | 1993 Chevrolet Corsica

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No power backfires,engine code PO134,replaced 02 sensors,map sensor,idle air sensor,throttle position sensor,took to chrysler,paid 150.00 to check,they said they need more time & money.Is a 2000 ULEV...


p0134 is the upstream 02 sensor staying center and will cause a drivability problem. you don't need to replace both of them, the one at fault is the upstream one, mounted on the exhaust manifold.I do it under the vehicle while on a lift, if you can see it from behind the engine and access it, just remove it. spray it down with some penetrating liquid before attempting to remove it

Oct 20, 2011 | 2000 Plymouth Neon

1 Answer

2001 ford taurus, 3.0 vulcan motor. just rebuilt the whole motor, backfires out of the intake, seems to be out of firing order. i triple checked my work and can't find the problem. whistling sound of...


Back firing out of the intake is because the valves/cams are not set right. When you did the timing belt . did you set the crankshaft mark at top dead center of the compression stroke. If it's at the exhaust stroke this would cause backfiring and violent shaking.

May 22, 2011 | 2001 Ford Taurus

1 Answer

Samurai backfire


It sounds more like a timing problem. If it backfires through the carb that means the intake valve is open when the spark plug fires. Same with the exaust but it the exhaust valve that is open.

Dec 14, 2008 | 1986 Suzuki Samurai

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