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Q: What causes an engine to backfire through tbi after warming up?
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What causes an engine to backfire through intake coming off idle?

Out of time.


What causes an engine to backfire after putting a fuel pump in?

Too much PSI.


What causes 1988 Dodge Dakota tuck backfire?

Backfire is normally caused by engine out of time, or spark plug wires installed incorrectly.


What causes the engine to backfire when trying to start a 305 Chevy?

It's lean. You have to figure out why.


What causes the 650 nighthawk to backfire?

As with any engine, timing, and also carb problems.


What causes a 1.6 engine to backfire?

Timing is off. You may need a new timing belt.


What causes Engine backfire through air intake when cranking Chevy 5.7?

Backfiring is usually an indication of a lean condition. When it does it during cranking, it's probably timing related.


Why does an engine backfire through the carburetor?

Incorrect timing or plug wires connected incorrectly.


What causes a one cylinder gas engine to backfire?

Several issues can cause a back fire:OverheatingLean mixtureFaulty ignition


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 77 Chevy caprice to backfire at low speeds?

That usually means the engine is lean. Could be a vacuum leak.


What causes polaris 250 2 cycle to backfire when starting or running?

I, too, would like to know the answer! I have a 1993 Polaris Trail Boss ATV with the 250 cc engine... it tends to backfire when letting off the throttle.