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Old 12-22-2011, 08:28 AM   #11
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if your wires have 150k on them thats likely your issue. you could mist some water around them and look for arcing.
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Old 12-22-2011, 08:33 AM   #12
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Wouldn't a bad ICM cause a random misfire? That was where I was supposed to look if the new spark plug hadn't worked.
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Old 12-22-2011, 09:07 AM   #13
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I doubt plug wires are your issue since you are getting a random misfire. Not likely that several wires would fail at the same time. I would suspect ICM or a failing fuel pump. Start by checking fuel pressure and ensuring the electrical connector to the ICM is clean and seated nice and tight.
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Old 12-22-2011, 09:11 AM   #14
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its possible its the icm but more often when the icm goes it wont start at all, or quits when hot as long as the tabs are corrosion free. its much more likely at 150k the wires are bad.
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Old 12-22-2011, 02:07 PM   #15
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Sounds like you are due for a tuneup. I usually go with Bosch wires available at your local parts store, they should come with a life time warranty and only set you back $20 or so. Do all 6 spark plugs as well, if you want some recommendations on plugs or the best way to do them, just ask. I've done it so many times now I've got the process down to 15-20 minutes and you could too!

If you still have your misfire then lets go from there.
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Old 12-22-2011, 10:18 PM   #16
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I've seen a single wire cause a P0300. Then after a short time P0306 finally showed up. Changed the wire and problem was fixed. P0300 simply means the PCM can't figure out which cylinder it is.
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Old 12-22-2011, 11:49 PM   #17
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Just use a good spark tester at the boot that goes on the spark plug. I you are getting spark you can pretty much guarantee that your ICM and coil pack (for that cylinder) is ok. If it was a crank sensor you would most likely get a code...PO325? i think. Like the other guys dont mess around, just tune it up. Its due anyway. Plugs and wired. Get the AC Delco iridium "fine wire" plugs. They are great!!
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Old 12-23-2011, 08:49 PM   #18
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well i did AC iridium plugs, wires. Icm tested good. Fuel regulator is good. Talked to a good mechanic today and he said since he wont be able to look at it till Tuesday, to take my temp gun and see which cylinders are cold, by pointing it at each exhaust port. Or too listen to each individual injector if i can. going to do these tomorrow and test the fuel pressure. They thought since i checked and confirmed everything electrical good, its likely fuel related and sounded like an injector. hopefully i can find out before they have to $$ lol. But thanks again to all of you for your advice, and i will update once i check it out tomorow
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Old 12-25-2011, 10:22 AM   #19
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If it is fuel injector, you should try a thing called 44k. It is better than seafoam, and I was told that the 44k will dissolve whatever is in the injectors and make sure the fuel filter doesn't get clogged, unlike the seafoam. The seafoam is good though too. (oh and the 44k is kinda expensive. my 1 bottle cost $35 to the seafoam'* $13)
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Old 12-26-2011, 09:59 AM   #20
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I thought about trying seafoam and puttin gas in it, its got a 1/4 tank, but I gave up and am bringing it to the shop tomorow. Been messing with it for a week now and am ready to have it back lol ill post updates on how its going tomorow. Thanks and happy holidays everyone
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