back firing

[eodruss13]

i have a 97z28 i just put jet hot long tube headers on it and an obd1 conversion. Im haveing a problem with it backfiring almost every time i let of the throttle. anyone have an idea to what it could be?

[2.2 Straight six]

do you have silencers cats an stuff after ?

the cause of backfiring, when talking about the "bang" an flame out'a the exhaust is unburnt fuel travelling down the exhaust system an ignighting when it meets the air.

see, when the throttle's open there's enough air to burn the fuel. when you suddenly lift off the fuel goes into the chamber, but there isnt enough air for it to burn properly, so it doesnt. then on the exhaust stroke it goes down the exhaust, while extremely hot, but still unburnt. then it meets the air as it exits the exhaust and ignites.

you dont often get this with unmodified engines because its all cooled or whatever before it meets the tail pipe, if you have open pipes that the thing above is why it backfires.

[kahjdh]

Its noting to worry about. When i put a homemade exhaust on my car you could hear it every time i let off. Its just what you get with an opened up exhaust. you could give your car a tune up if your paranoid, that usally helps it a little.

[Xenostalgia]

Its not a backfire, its just inconsistant pressure in your exhaust. It happens on mine too with flowmasters. Not a backfire, temp solution: left off the gas slower

[eodruss13]

i have 3in collectors, x-pipe, 3in pipe (dual) to bullet mufflers and turn downs

[88camaroproject]

ooo bullets sound good? i was thinking about getting some.