GT S197 General Discussion This section is for technical discussions pertaining specifically to the V8 variation of the 2005 and newer Ford Mustang.

Running Rough + Loss of Power = My Probelm

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Old Jun 29, 2010 | 08:15 PM
  #11  
CBSTANG's Avatar
CBSTANG
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From: Southwest Iowa
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Well, its official, Accell COP's suck! Not only were they the problem, but when I went to take one of them out, the damn boot broke off. The piece left was about flush with the top of the plug and was a pain to get out even with long needle nose pliers. Took it out for a test drive, and sure enough, it ran like a scalded ape (thats a very good thing). Thanks for everyones help.
Old Jun 30, 2010 | 04:38 AM
  #12  
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Diabolical!
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Joined: Jul 2006
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From: New Orleans
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Originally Posted by CBSTANG
Well, its official, Accell COP's suck!
It's not just the Accells. Most aftermarket COPs for the 3V are absolute crap. I haven't heard of anyone having failure with the MSD COPs, but MSD doesn't make any rating claims about their COPs, so they could be the same as stock for all I know. After my experience with Granatelli's CRAPPY COPs, I will just stick with the stockers.
Old Jul 2, 2010 | 08:02 PM
  #13  
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moosestang
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From: Gainesville, FL
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Originally Posted by CBSTANG
I've thrown the stock plugs away, but I dont have the stock COP's stored somewhere. I'll have to find them and try that. But wouldn't they throw a code if one was bad, or am I giving the PCM to much credit?
No they won't, mine failed after 1 1/2 years or so. I just put the stockers back on. My car ran pretty good until I tried to accelerate, then it shook and felt like the clutch was slipping.
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