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You could have the firing order messed up.
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∙ 14y ago
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88 Cherokee w EFI runs rough and backfires through intake?
Could be a burned valve (do a compression test of all cylinders) Could be a timing problem (check the timing)
Why does 94 Cavalier 3.1 RS idle rough for about 5 days and now it starts and races and backfires and shuts off?
Sounds like a bad vacuum leak, maybe a bad intake manifold gasket?
97 Lincoln town car starts but backfires and runs very rough then stalls what can this be?
vacuum leak
Your car idles rough and backfires what should you be looking for to fix it?
check make sure the firing order is correct.
Why does your 1998 blazer run rough at low idle?
The 1998 Blazer could have several problems causing rough idle. Check the air filter, fuel pressure, and EGR valve for a clog to look for the problem.
What causes backfiring in Kawasaki 220 bayou?
I have a problem. I just bought a used 1995 Kawasaki 220 Bayou. The engine started running a little rough at first. Kept getting worse and then started backfiring through the exhaust. I had the carbeurator rebuilt but still runs rough and backfires. Cranks good and idles good. What could be my problem? Thanks
What causes a 1987 Blazer with a 350 to idle good then in gear rough and under a load sputter and backfire and is not fuel injected?
The ignition timing is not set correctly or the timing chain is worn out or installed incorrectly.
1992 Corvette runs till 190 degree then backfires?
1992 lt1 corvette runs good until it reaches 190 degrees the starts rough idel and backfires/ the car would kinda run rich in its past with black smoke at times
Why does Chevy blazer have rough idle and engine shake at idle?
Check the motor mounts.
What causes an engine to race when started and then run rough and die often backfiring through the intake?
The year, make and model info would be helpful but a large vacuum leak could do that.
Will a intake gasket leak cause misfire and rough idle?
yes it can
What causes a rough idle after changing the intake gasket and a rotten egg smell in a 2000 Pontiac grand am 3400 engine?
Can be many things, but considering you just changed the intake gasket, I would suspect you did it incorrectly or have knocked a vacuum hose loose somewhere. You have a vacuum leak somewhere.
