IAC values on scanner ---help. - Ford Mustang Forum
 
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post #1 of 2 (permalink) Old 01-04-2013 Thread Starter
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IAC values on scanner ---help.

95' GT auto. Its runnin pig rich, always has, changed every sensor on the engine and more, just wont run right or shift right. Stays under a heavy load constantly.

So im riding with mechanic as he scanning with a pegisus scanner and everything looks spot on. Fuel trim values were ok but it only get 150-180 to a full tank. When u drive up a hill it wont downshift.

Really only thing that stuck out to me was the IAC values. It switched low from like 20 something to 60+(New Motorcraft$$$.)

Ford MAF does not throw CEL. Both NAPA and DELPHI MAF's throw a lean code on both banks. No vacuum leaks or obvious stuff.

Nobody knows whats wrong. 4 scans now, dealer and independent shops. Idk?? If anyone has experience help me out please!!!! Every sensor is new including the MAF. The ford(original)MAF seems to be the best one so far, but it doesn't run right with it. The napa one doesn't idle correctly but has better acceleration and just all around better while your driving. The DELPHI one i put in today the car won't run at all- nothin. Stumpped.
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post #2 of 2 (permalink) Old 01-04-2013 Thread Starter
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^^^ Another thing..................

With the Ford and DELPHI MAF's when rolling down a hill no gas pedal, the exhaust sound is a huffing sound.

The NAPA MAF it pops and cracks sounds really great. Like its supposed to. The others MAFs will not produce this fuel mix....
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