A backfire is when the ignition of fuel doesn't take place in the ignition/combustion chamber, it(a backfire) can take place in the intake or exhaust. It can be caused by a fuel to air ratio not being correct, also if the timing of the spark is not just right that could cause it to back fire. It could be running lean with not enough fuel and too much air, or could have too much fuel and not enough air. It could be because the intake valves are not shut when the combustion takes place, therefore the combustion would take place in the wrong spot. The most likely cause are from: 1. Incorrect timing, the timing issue could be caused by bad wiring/ or bad ignition. 2. Incorrect fuel to air ratio, bad fuel filter, low fuel pressure-caused by weak fuel pump. Most cars will have the same cause for backfiring, as long as it's an internal combustion engine it shouldn't differ...
Your car backfires when you need a new transmission,or tune up. How do you know the difference? Simple...if your car backfires then wont start, or wont start and then backfires,you need a transmission. If it backfires, and then starts moments after, you need a tune-up. Glad to help...David
Sounds like the timing is off.
my car starts every now and again, but when it does start it turns off and then it backfires. i dont know if it is the fuel pump or the sparkplugs or both, please help me find the problem.
Time for a tune up.
it is out of time or the plug wires are connected incorrectly.
while driving yur car reduces speed then pulls off with speed and backfires what can cause that
The answer is " Backfires ". - Answered
vacuum leak
check make sure the firing order is correct.
car stalls backfires hard to start
the spark timing has to be adjusted (on older vehicles only)
If any car backfires it is usually due to retarded timing, running lean or a problem in the valve train.