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Need some help. Car stumbles then suddenly comes back into power...

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Old 07-17-2007, 02:15 PM
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Default Need some help. Car stumbles then suddenly comes back into power...

Hey guys,

Did a few things this weekend now the cars runny crappy. I swapped my ECT sensor. Had the battery disconnected and decided to clean the MAF with electronics cleaner. It didnt look dirty though. When I started it back up I forgot to plug a plug wire back up and of course got a misfire code. I already had a ECT code. So when I figured out I was dumb I hooked the plug back up. ANYWAY TO THE POINT... When im driving I get a intermittent hesitation like 4000 rpms and below. I will start hesitating and if I hold the same gas pedal pressure after 3 or 4 secs it will suddenly kick in like a turbo and have its power back. Could I have screwed the MAF? Im going now to get my codes re-read at autozone but any help would be appreciated.

Thanks,
Erik
Old 07-17-2007, 02:17 PM
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All I want is to get these damn CEL's cleared so I can get it inspected and prob fail the db meter.
Old 07-17-2007, 03:34 PM
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Sounds like an A/F issue to me. Anything involving the MAF could be potential hazzard. Also, it could be your front O2's acting up. Or, you may have an exhaust leak prior to the O2's.
Old 07-17-2007, 04:08 PM
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Ok I took it back to autozone. More CEL's from before. I didnt get the codes like a dummy but One had something to do with air/fuel metering, another with the bank 1 primary O2 being bad and a cylinder 6 misfire. All out of nowhere. And I havent touched cylinder 6 for anything. I just disconnected the plug wire by the ECT to get to it better. Thanks for your help orangeapeel. I just replaced the front O2 with a bosch 1311 or whatever and waitin for it to cool down so I can check the plug wires. Damn car
Old 07-17-2007, 06:39 PM
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Im so fed up Im just throwin money at the damn thing. I bought a remanufactured MAF from autozone and gonna slap that in in a few.
Old 07-17-2007, 08:12 PM
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ok fellas new MAF didnt work but I inspected the #6 sparkplug and wire and it was fine. #4 plug wire was hard and burnt some from resting a lil on the header. I replaced the driver side primary O2 as well. Its still hesitating in lower rpms and up to half throttle. its intermittent but persistant. At full throttle the thing runs fine. Could the one bad plug wire be jackin me up like that? Those MSD's have less than a thousand miles om em.
Old 07-17-2007, 08:56 PM
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yes, all it takes is one.
Old 07-19-2007, 02:33 PM
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I'm having some what the same thing happening on my 2002 SS with 115,000 miles. I can not get a PO300 code to go away. I get the misfire at low rpm seems to clear what at higher rpm.
Old 07-19-2007, 04:52 PM
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You guys need HP Tuners or EFI Live. Drive around town and just have it setup to log everything. It will show you what was going on at the time of misfire/failure. I have used it many times to my advantage.
Old 07-20-2007, 03:33 AM
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I think I may just splurge and go for HPTuners. Then I need a wideband with it. Theres another few hundred bucks....
Old 07-21-2007, 09:43 PM
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I'd fix the obvious plug wire first. Also check the injector connectors.
Old 07-21-2007, 10:05 PM
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Originally Posted by ErikElvis
ok fellas new MAF didnt work but I inspected the #6 sparkplug and wire and it was fine. #4 plug wire was hard and burnt some from resting a lil on the header. I replaced the driver side primary O2 as well. Its still hesitating in lower rpms and up to half throttle. its intermittent but persistant. At full throttle the thing runs fine. Could the one bad plug wire be jackin me up like that? Those MSD's have less than a thousand miles om em.
i had the same issue for a while, and all it was was my sprak plug wires touching the headers on a cylinder
Old 07-21-2007, 10:19 PM
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Well fellas seems after all this I had stupidly plugged in an O2 sim into the primary spot. Well at least just about everythings new again.




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