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Fox Body Mustangs
Extremely rich and rough idle
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<blockquote data-quote="AfricanSnowOwl" data-source="post: 16481085" data-attributes="member: 168923"><p>Yes, the vacuum reading at idle is 14-16". On the low side. Everything I read said low vac means timing is off or a leak, but I am 100% sure there is not a leak. I tried adjusting timing with the vac gauge hooked up. The car seemed to like advanced timing of around 14-15 degrees the best. </p><p>The car does have a map sensor. I tried changing it out with a different one and it made no difference. As far as testing the map sensor all I really did was verify the 5v ref wire had the 5v. Is there a better test to try with the map sensor?</p></blockquote><p></p>
[QUOTE="AfricanSnowOwl, post: 16481085, member: 168923"] Yes, the vacuum reading at idle is 14-16". On the low side. Everything I read said low vac means timing is off or a leak, but I am 100% sure there is not a leak. I tried adjusting timing with the vac gauge hooked up. The car seemed to like advanced timing of around 14-15 degrees the best. The car does have a map sensor. I tried changing it out with a different one and it made no difference. As far as testing the map sensor all I really did was verify the 5v ref wire had the 5v. Is there a better test to try with the map sensor? [/QUOTE]
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Extremely rich and rough idle
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