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Registered
1999 Deville
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6 Posts
Discussion Starter #1
I just started a couple of weeks ago experiencing what feels like a miss once the engine is warm and I come to a stop.
I was at at a stop light last night and it missed twice while at the light. After take off and driving I don't feel it and I don't notice any loss of performance. The MIL isn't on but there are a few codes in history:
P0440 - EVAP System Large Leak (Forgot to tighten on my gas cap not long ago)
P1520 - Transmission Range Switch
P1527 - Transmission Range to Pressure Switch Correlation

I asked a mechanic and he said maybe changing the plugs and go from there. The car has 76k miles. Anybody have thoughts?
 

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98 DeVille, 97 DeVille d'Elegance
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7,345 Posts
Clean the TB and plugs good idea at this age. Ac delco only or it'll run bad.
 

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Administrator
2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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68,552 Posts
............. and, at 16+ years old the plug wires are suspect. So is the cleanliness condition of the coils, bases, and ICM mounting and ground system.

RockAuto - the expensive AC Delco plug wire set. Tech Tips - ignition system cleaning and wire changes.
 
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