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The most likely cause is improper ignition timing. In many cases the timing can be adjusted by rotating a distributor. Many older motors develop excessive wear to the timing gears,chains belts or any of the moving parts, and one day, usually while starting, they "JUMP" time as it is called. Also, when this happens, trying to adjust the timing usually won't be successful. Time for a new yiming set. Hope this helps.
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∙ 15y ago
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What causes backfire from exhaust pipe?
Unburned fuel in the exhaust system causes the backfire from the exhaust pipe.
What causes backfire through the exhaust while starting a 1994 Honda Civic?
It is timed incorrectly or plug wires are installed incorrectly.
What causes an exhaust backfire on lt1 camaro?
I think you are hearing pressure pops. Not a backfire.
What causes a backfire in a motorcycle?
a backfire is caused by incorrect timing or not enough back pressure in the exhaust pipe
What causes backfire through exhaust on 1986 GMC only on passenger side with dual exhaust?
I would suspect the spark plug wires are installed incorrectly on the passenger side.
What causes a 1973 Pontiac 350 engine to backfire through the exhaust?
A large backfire is most likely caused by a bad spark plug or plug wire. Unburned air and fuel pumped into the exhaust will often be ignited by the other cylinders still burning exhaust gases. Also check your ignition timing, if it is late and you have a rich mixture you can get a backfire. An exhaust leak will let air enter the exhaust under deceleration and cause a "popping" sound.
Why is your 92 F150 5.0 backfiring through carburetor?
A backfire is caused by many different things. Using the wrong grade fuel will cause a backfire, as the engine's compression ratio is usually too high and will detonate the Air/Fuel mixture, causing a backfire. It can also be caused by advanced or retarded timing. Advanced timing will cause a backfire through the intake, as the spark occurs too early and ignites the Air/Fuel mixture before the intake valve is closed. Retarded timing causes a backfire through the exhaust as the spark occurs after the exhaust valve has opened. Your problem seems to be advanced timing. A backfire is caused by many different things. Using the wrong grade fuel will cause a backfire, as the engine's compression ratio is usually too high and will detonate the Air/Fuel mixture, causing a backfire. It can also be caused by advanced or retarded timing. Advanced timing will cause a backfire through the intake, as the spark occurs too early and ignites the Air/Fuel mixture before the intake valve is closed. Retarded timing causes a backfire through the exhaust as the spark occurs after the exhaust valve has opened. Your problem seems to be advanced timing.
What causes a muffler to split?
Useully caused by a backfire thru the exhaust from poor ignition gases built up
What causes a motorbike to backfire?
unburnt fuel wich goes to your exhaust, where because of the heat ofcourse is set on fire and then strikes flame out of your exhaust! sorry for my English
What causes your 289 Ford Falcon to backfire?
ok, is the backfire through the exhaust or inlet manifold? if its through the exhaust it means ur mixture is to rich, causing unburnt fuel to ignite in exhuast, if through inlet it is a lean backfire, either way if carby in good condition it sounds like mixture screw, to adjust, start car and get to operating temp, wind mixture screw in till car almost stalls then back out 1 and a quarter turns, that's a static point to go from. good luck
What causes an engine to backfire through intake coming off idle?
Out of time.
What causes backfire through the exhaust while in neutral in a 1994 Honda Civic DX?
first and best thing to find out is if your running rich or not your fuel to air ratio might not be just right. check your oxygen sensor and do a full tune up.
