Ls1 Misfire,sputtering

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Feb 12, 2014 | 09:41 AM

91ls1silverado

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Launching!

Joined: Jul 2013

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From: Las Cruces, NM

Ls1 Misfire,sputtering

So yesterday i went for a drive and it started to misfire when i would barely tap the gas to mantain the speed and i let go on the pedal and tap the pedal it would work fine and then it'll do it again. I went to my buddies shop and the scanner said that the o2 sensors are fucked and it was running rich. So i changed them last night and this morning i tried taking off and it was worse i had to put it back in the garage its running really rich now ever since i put the new o2 sensors, it was idling fine In the morning until i tapped the gas and it wouldn't keep idle...do i reset the IAC? RESET THE COMPUTER?

Feb 12, 2014 | 10:26 AM

BandDirector Blk98ZM6

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From: Macon, GA

If you have a K&N filter, it could be a dirty MAF...

Feb 12, 2014 | 10:50 AM

91ls1silverado

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Launching!

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From: Las Cruces, NM

Also when i revved it, it started to backfire..

Feb 12, 2014 | 09:27 PM

tryintogofast

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Try unplugging the MAF and firing it up. It'll trigger a CEL and force the computer to run off the MAP sensor in a speed density type mode. Rev it and see if it still backfires.

Mike