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Discussion Starter · #1 ·
Stock engine but cold air box, e-fan concersion

its throwing an o2 code but the sensors are new/clean. New cats installed as well

now randomly
After running great for a while - it starts to miss
And once it starts it seems the only thing i can do is to disconnect the battery for an hour or so.
The scanner shows #2 cyl miss fire and #2 coil control unit.

so i disconeectdc the bat, changed the #2 coil
It drove great foe 200 miles - the. Randomly started again.

bought another new coil just in case,didnt solve the issue at all.

so i replaced the injector -started the car,acter 3-4 minutes of rhnnkng, it cleared itself out, and-ran great for another 100 miles - them missfire
Again

Any ideas?!?
 

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TrailblazerSS
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The wires have been known to burn on the manifold, header, have you changed or swapped wires around?

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07 AWD 3SS
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Bad #2 plug? Bank 2 sensor? could have a small crack in the plug, maybe. Heat makes it worse, cools down, acts normal, heats up, starts misfiring maybe? doesnt sound like wiring. Two cents
 
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