996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

Running rough

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Old 08-21-2014, 06:03 PM
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Running rough

Running rough. Barely idling ...looks like one bank is effected. Lots of codes. Misfire misfire. Just changed the plugs last night. Exhaust tips looked like this when I got home.
 
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Old 08-21-2014, 06:09 PM
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You have a bank running rich did the car run fine before plug change.
 
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Old 08-21-2014, 06:34 PM
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Looks like one side is not firing at all and other us super rich or like timing is completely off.
What kinda noises is it making and what codes? I hope chain is ok.
 
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Old 08-21-2014, 07:28 PM
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Fwd:
Po130
Po153
Po300
p0301
P0302
P0303
P1107
P0030 pd
 
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Old 08-21-2014, 07:32 PM
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Walking out to get the codes. There was a nice shot. Black car is car running rough.
 
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Old 08-21-2014, 07:35 PM
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Note the black exhaust is the normal one.... had a bad boost leek 2 weeks ago and now fixed. The perfectly clean one happened since lunch today.
 
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Old 08-21-2014, 09:32 PM
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All signs point to bad MAF
 
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Old 08-21-2014, 10:02 PM
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Wouldnt Bad maf affect both sides?
You have bad firing all on only 1 side.
Maybe cam position sensor, but best to have it flatbedded to your mechanic.

There was another post where the chain broke and it still idled but very rough.
Since its interference motor, I wouldn't try starting it again.
 
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Old 08-22-2014, 01:02 AM
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All good info but again did it run smoothly before plug change? Maybe during plug change you bumped something or pulled a connector loose.
 
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Old 08-22-2014, 04:21 AM
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did the failure come with the plug change? If yes something is wrong with your plugs/coils

black exhaust ....maybe a boost leak

ore one 02 sensor bad?...check it with durametric
 
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Old 08-22-2014, 05:35 AM
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I thought it was the plugs because I had a very big boost leak for a while which caused it to be rich. The problem was there before the plug change . The plug change did not seem to help or hinder.
 
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Old 08-22-2014, 06:20 AM
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Probably that bracket that hold the cam sensor in that frequently cracks with age. Hairline crack in the bracket won't be noticeable but will cause hella misfires on one bank.
 
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Old 08-22-2014, 06:26 AM
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does the engine smooth out over 3k?
 
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Old 08-22-2014, 10:59 AM
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Yes it does smooth out above 3000 . I should have noted that.
 
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Old 08-22-2014, 04:09 PM
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pull your plugs, which plugs you went with? model number.
check your coils, if you see hairline crack, replace it
how many miles on your car?
timing, bad maf. - cleaning might help.
bad gas?
check for boost leak, check intercooler pipes
 


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