causes of a missfire

[A fireman]

ok after spending all day with my engine torn apart cleaning and replacing the seals on my intake phleum when i got the car back together it idles very high (1500rpm) and its missing. i don't see an ses light so i can only figure the computer hasn't detected the misfire. also there is an off smell i cant quite identify its not gas or oil ( burnt or) unburnt.

oh the car is a 94 firebird with the 3.4L

[Meatyshells]

Re: causes of a missfire

if it idles high its probably a vac leak.
and did you hook all the wires back up right?

[A fireman]

Re: causes of a missfire

it looks like everything is back properly and the high idle was from me opening the throttle stop screw to far. i moved it back and its idling normal again.

its still running rough and im seeing puffs of white smoke that dissipate very quickly out of the exhaust tip

*edit it apears the #6 injector didnt seat fully so im going to pull the rail and try to re-seat them

[flamingchicken]

Re: causes of a missfire

the 3.4 injectors suck! i absolutely hate workin on that motor! how far into the motor did you go? just upper intake?

btw, where in floribama are you?

[loser]

Re: causes of a missfire

it looks like everything is back properly and the high idle was from me opening the throttle stop screw to far. i moved it back and its idling normal again.

its still running rough and im seeing puffs of white smoke that dissipate very quickly out of the exhaust tip

*edit it apears the #6 injector didnt seat fully so im going to pull the rail and try to re-seat them

update when you can, but if the smoke goes away quickly i woulndt worry, thats normal.

if the smoke is thicker,and lingures you might have a problem, but it doesnt seem like it.

but so you know, blue smoke is oil, white is anti-freeze, black is fuel.

edit: if you think you have a vac. leak, get a can of carb cleaner and spray where you think it is, if the idle calms down then the leak is where you sprayed.

[A fireman]

Re: causes of a missfire

well it turns out my idle was from the throttle plate being to far open and some how along the line i damaged the injector for the #2 cylinder. the entire lower runner was full of gas. the smoke i thing was the large amount of carb cleaner and carbon that came from the 2 manifolds. Its all good now, injector fixed and its running smooth again :banana: