random misfire

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10-01-2006, 06:06 PM

BlackBADaSS02

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Join Date: Sep 2005

Location: Millville, NJ

Posts: 12

random misfire

I just changed my plugs and wires the other day. Autolite Iridiums and MSD wires. I have HP Tuners, so I was using it to look for misfires. My SES light does not flash, and no codes show up, but HP Tuners is telling me that cylinders 2,4,6,7,8 are misfiring 0-4 times per cycle. It happens more at idle than when cruizing. Any idea on what could be the cause, or should I just not worry about it.

10-01-2006, 09:14 PM

AL SS590 M6

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Join Date: Jul 1998

Location: Charlotte,MI USA

Posts: 6,249

Re: random misfire

If it doesn't set your SES don't worry.

10-01-2006, 09:58 PM

Bayer-Z28

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Join Date: Jan 2005

Location: N Falmouth MA

Posts: 2,597

Re: random misfire

an 02, huh?... I'm thinking cam sensor signal is falling off.. I believe that's what tells the computer to fire which cyl... but if it's from a newly changed part, it most likley wouldn't be that..

I haven't heard of LS1's running Autolites... those are typically Ford Plugs. I had a wicked bad misfire problem on my previous car due to Bosch Platnums. ...Bosch no workey on GM DIST less ignition.

Last edited by Bayer-Z28; 10-01-2006 at 10:01 PM.

10-03-2006, 10:18 AM

skifast87

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Join Date: Jun 2006

Location: Howard Co MD

Posts: 92

Re: random misfire

do you flat out feel and difference or hear any thing. If you got miss from my experence your gonna know about it. It might sound like a pop or kind of like a back fire if its bad.