Cracked down pipe flex pipe. - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-27-2009, 10:11 AM   #11
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I'd take a close look at the trans/motor mounts as well to make sure nothing is causing excessive twisting
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Old 04-27-2009, 09:02 PM   #12
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Hey guy’* thanks for the help and advise..

The first thing I checked after removing the down pipe was the coils and wires since I’m familiar with this problem after having two coils going bad on me one after a other. I did replace all three at once with MSD coils, did not want to wait for the other coil to go bad. I wonder if the MSD'* have warranty. Anyway I never reinstalled the cracked down pipe since it could not be fixed ..So I can't start the car to check.
I should be getting the down pipe by the end of the week and I'll keep you all posted.
Thanks again.
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Old 05-01-2009, 09:52 PM   #13
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Ok... I installed the down pipe from Hogan performance. I can hear the difference! Sounds strong!
Well, for the cylinder #1 misfire it was still there. My coil went bad, the way I tested was swapping the 1&4 coil with 2&5 coil. I erased the code and started the car again, still had rough idle plugged in the reader and there it was cylinder #5 misfire. I wonder if the air leak caused a coil to go bad or just coincidence. I did drive it 19 miles home with a cracked flex pipe. These MSD coils are maybe a year old. However, I put my old Gm coil in and it is running fine now.
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Old 05-01-2009, 10:01 PM   #14
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I doubt the cracked DP caused the coil to fail. Some times they just go bad.
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