the car will start fine but will not idle. it dies after stating up unless i feather the heck out of the throttle. the fuel pump and sock, fuel filter, timing belt, idle air control motor and idle postion sensor have been changed. it shows codes 12 and 55 only. HELP
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1990 Dodge Spirit
Question: will not idle
Answer #1mastertech6371 April 19, 2011, 16:26Master
those are normal codes. code 12 is no tach signal but you checked it with the motor off. 55 is end of check.
i would look for a vacuum leak for the idle. also, check the map sensor. the line clogging up with carbon was common.
Replybobclev, April 19, 2011, 17:34Rookie
line is not clogged and no leak. thanks anyway
Replymastertech6371, April 19, 2011, 17:37Master
what did you set the minimum authority screw at??
Replybobclev, April 19, 2011, 20:17Rookie
sorry but what minimum authority screw