car is back firing at high rpms
01-21-2008, 02:34 PM
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car is back firing at high rpms getting on the freeway today, my car back fired 1st through 3rd when shifting @ 5000ish rpms It has been doing it in 3rd for sometime. Its just getting worse. I am about due for a tune up. Could that have any effect on it? Anything to do with my exhaust? I have 3 inch duals that dump at the axle and dynamax bullets. I'm @ 92k on the odometer. Thanks for any ideas.
01-21-2008, 02:37 PM
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Change your fuel filter. You may be leaning out at high rpms. If your plugs and wires were bad, you'd have this problem at low rpm. Fuel filter should cost <$20, so change it and let us know whatsup.
01-21-2008, 02:57 PM
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Check for any vacume leaks intake area hoses on the back of the intake. if a plug wire came loose, cleen your maf with CRC MAF cleener only.
And I'd do a tune up get some good plugs AC DELCO uridiums are a 100,000 mile plug thats why their 6 bucks a peice.
And I'd do a tune up get some good plugs AC DELCO uridiums are a 100,000 mile plug thats why their 6 bucks a peice.
01-22-2008, 09:57 PM
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I've got NGK TR55s in there now. They have been great. 6 bucks a piece is a little bit ouch 
I'm probably due for a new fuel filter by now too. I'll check for leaks Thanks for the advice! Hope it helps!
I'm probably due for a new fuel filter by now too. I'll check for leaks Thanks for the advice! Hope it helps!