Random multiple misfires issues

[Austins01GP]

This issue started a while back and can be viewed here

http://www.grandprixforums.net/threads/101250-car-likes-to-choke-dog-down-sometimes

Today no matter how many times shut off my car (2005 comp g) it will not run normal. The car wants to bog down and is jerky while accelerating. There are no codes showing on my scan gauge. currently but last week it through p0300 random multiple misfires. Watching the misfires today it was showing cyl. 2,4,6 were randomly missing. I replaced the ICM to no avail.

Any ideas whats broken?

 

[Fivefingerdeathpunch]

Time to maybe rip apart the wire harness and see if any damage can be seen.

 

[Austins01GP]

Well that doesn't sound fun... lol
Might be possible tho, it was raining today, possible wire issue

 

[Scottydoggs]

im thinking clogged cat, that would make it bog, or kinda sound like a vaccum with a full bag, or your hand blocking the suck tube off.

bad cat also causes random misfires.

 

[Austins01GP]

Car sounds normal from what I can tell. The cat was replaced with in the last couple years no strange smell either (not that that method is fool proof lol)