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.

Re: random misfire
 

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

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.

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.

Re: random misfire
 

are you sure the plugs are gapped correctly?

how bout the wires pressed all the way on the coil or the plug??