RANDOM all cylinder misfire

[rdrr96]

what the hell would cause this? it started out as a bump thing where if we hit a bump it would cut out 2 cylinders. so we brought it to chevrolet and said hes what we think the problem is... fix it. after putting it on their computer they determined that wasnt the problem so they fixed the center coil pack, changed our plugs and wires, then managed to charge us 700 in labor.:rant: GAY! but anyways... we get it back and now its doing it harder than ever... neddless to say we brought it back and they have had it for a week now and the computer is reading out that ALL cylinders are RANDOMLY misfiring.:rant: what could the problem be? i have decided its got to be either the wiring harness, a short in the electronics, the computer! any other ideas?

[slow6]

Re: RANDOM all cylinder misfire

$700 in labor? not including the parts?
Your injectors could be dirty or it could be a bad ICM.
I have a random misfire too, but my engine is running lean.
I dont know

[rdrr96]

Re: RANDOM all cylinder misfire

parts and labor was 700... which is BS... cuz i could have done the labor myself, not exactly difficult stuff to work on. anyways they have already change the ICM and that didnt fix the problem. any other ideas?

[slow6]

Re: RANDOM all cylinder misfire

clogged injectors maybe?
I have a lean AFR which makes me have p0300 random cylinder misfire

[rdrr96]

Re: RANDOM all cylinder misfire

clogged injectors... it would be rather constant rather than RANDOM... correct me if im wrong... AFR i am unsure as to what you mean but i think you mean Air/Fuel Ratio... but what can i do to fix that?

its "random", it does it most when we hit bumps. i honestly dont know how to explain it, basically it has gotten me to the point of P/O! :rant: :rant: :rant: