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Old 07-04-2010, 07:47 AM   #11
Maritime Storm
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Join Date: Aug 2002
Location: Riverview, NB, Canada
Posts: 918
 

2003 ION-2 Sedan
Default Re: Can't seem to fix this car?!?

Your MAP sensor is telling you it's reading 16-17 inch of Mercury, does a hand gauge confirm it? If so, move on to having the injectors cleaned, sounds like one may be sticking open intermittently(have run into this in the past), your fuel pressure off is within specs, but shouldn't be varying that much when idling. If you haven't hooked a hand held gauge on to the vacuum ports on the intake, do so to rule out a bad MAP.
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