97 Monte cylinder misfire help
Ive got a 97 Monte Carlo 3.4L engine. Check engine light started coming on last week. Had the code read and it was cylinder 2 misfire. Checked the plug and wire, everything looked ok. Swapped plug wire with cylinder 4. Code still reads cylinder 2 misfire. Swapped the spark plug with cylinder 4. Still reads cylinder 2 misfire. So taht pretty much leaves the coil pack as being bad right? Aside from something internally wrong which I doubt. There are 2 cylinders on each coil. 2 and 5 are together. Can just one side of the coil be going bad since I am not having trouble with cylinder 5 at all?
If it isnt the coil pack, Im guessing the injector could be failing. never messed with an injector. Are they easily accessed on this engine or do I need to be pulling the intake? Ive got a Haines repair manual but it isnt very informative as to where the injectors are located. Thanks |
did you clear the code before doing the switch??
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the 3.4 is kinda a pain to work on, the intake probibly has to come off, but im not sure.... i could go take a look at my dads Z34 later & see where the injectors are.... you could also try dumping a container of injector cleaner in with a tank of midgrade gas, some of the additives might help to burn off any buildup on the injectors....
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No I didnt clear the code. Figured that doing either would produce a new code to show up as cylinder 4 misfire. The computer wouldnt stop adding new codes would it because of an existing code?
How much trouble is it to remove the intake if it has to be taken off? |
for the intake manifold it should just unbolt & lift off after you make sure to unplug any sensors / remove the air - intake hose.... the older style 3.1's were a similar setup.... check out your haynes manuel, too... i know they are not the best but they can give you a better idea....
oh, how many miles are on the car, out of curiosity?? |
skylark,
its got 113k on it. A lot of original parts on it still. Just changed the radiator hoses last week that were the original ones. |
try some fuel injector cleaner for a few minutes, rev it a little bit, might clean it out
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I put two bottles in friday night and took to the hwy for about an hour. Seems a little better but the problem is still there. I pulled the injector yesterday and it looked great. Unless there is corrosion inside of it that I dont see. Might try to swap it with the injector next to it. Those two are easy enough to pull without removing the fuel rail or anything else.
When I clear the code, I can take it out driving and get another code in 2 minutes or it might take 15 or 20. So it must not be a constant problem. Im about to just let my mechanic mess with it. ARGH! |
if worst comes to worst just keep feeding it that injector cleaner, its still gonna help, and it sounds like the problem is getting better, good luck =]
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strange thing happened. I swapped the #2 and #4 injectors. Now I am getting a code 300 which is a multiple cylinder misfire. Not sure what to think. Wonder if I should swap them back and see if I am back to just a code 302 cylinder 2 misfire??
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