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Old 12-08-2011, 02:29 PM
  #31  
Simon1
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Originally Posted by ym42
I think cats should not affect ignition systems...
Clogged cats can affect the entire engine including ignition systems. Some clogged cats have gone as far as to create detonation from extreme back pressure, causing catistrophic failure.

I'm glad plugs were your fix.
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Old 12-09-2011, 12:50 AM
  #32  
ym42
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Well I knew I was ok cuz even with 3 codes I raced another GT and left him behind lol:-) And cats didn't rattle... But I'm all good now. Can't believe it's over!
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Old 12-11-2011, 05:29 PM
  #33  
moosestang
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Originally Posted by ym42
This is just to confirm that the source for my P0430 code were bad spark plugs. After changing to new Motorcrafts all codes are gone!!!
How's your long term fuel trims now? +20% at idle is high.
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Old 12-14-2011, 08:24 PM
  #34  
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After driving about 25 miles I got +12.3 +14.8 with STFT ~+-.8 on both banks... It's usually the same when I'm cruising highway too...
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