wtf

[945.0]

ok first its a 94 lumina with the 3.1 mpfi motor. new head gaskets,timing chain and gears, coil packs, icm, ecm, plugs, wires, crank sensor, one new fuel inj., and no matter what i have replaced i am still getting a miss in CYL 5 ONLY. I have unplugged the map sensor and the miss is less noticeable, does not have a vacuum leak, the wires are routed correctly, plugs gapped correctly, i am lost and have no clue anymore, heres a pic of the dry intake runner on cyl 5 and a vid of the noise. any help would be greatful.

http://www.youtube.com/watch?v=3gfwCNfZyfM&feature=plcp

 

[CC'S95GT]

fuel injector?

 

[FrankenStang]

i was going to say fuekl injector also or maby a nsticking valve....seafoam through the intake when the engine is warm not hot...also through the gas and see if it help losen anything out of there...if not,atleast you got a cool smoke show for 7 bucks..

 

[Tony]

you better not say fuekl^ lol!

 

[Valkyrien]

Valve seal or bad injector I think, have you done a compression test?

 

[945.0]

Valve seal is related to oil consumption. Injector was replaced and then had same issue so I swapped another injector in there from a cyl that is working same problem has not changed. Comp. Test is good and I have done seafoam and might do it again.

 

[MustangChris]

can you get a test light on the injector harness? my 93 buick injector harness went bad.

 

[945.0]

Don't say that Chris I'm ready to throw this car away

 

[vermilion]

Make it swim wiff da fishes


Sent by smoke signals

 

[945.0]

i think the harness may be bad

 

[Raffaelli]

I fought this battle with a 02 Buick Century.'


It was the guide sticking on the valve. Had the head rebuilt first, still did it. Had another shop go over it w a fine tooth comb and found a loose valve. Rebuilt it again and all ok.

But check compression, and check the injector trigger with a noid light first

 

[945.0]

I fought this battle with a 02 Buick Century.'


It was the guide sticking on the valve. Had the head rebuilt first, still did it. Had another shop go over it w a fine tooth comb and found a loose valve. Rebuilt it again and all ok.



But check compression, and check the injector trigger with a noid light first

comp test good. i am checking harness tonight

 

[945.0]

inj harness good

 

[uncltrvlnmatt]

Did you change the plugs, and wires? Just because they are gapped right does not mean they are working right.

 

[945.0]

Did you change the plugs, and wires? Just because they are gapped right does not mean they are working right.

yep should say what has been done in the first post from me. i have now been told it could be a pulled rocker stud, lifter and sticky valve, but the fans wont kick on when there supposed to so thats a bad sensor there, i am waiting to here back from the dealership to see if i can get into a newer car if i can afford it they can have this pos chevy