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Old 05-15-2014, 04:51 AM   #1
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Vacuum leak question

Have a 93 gt engine with e7 heads, 1,7 svo rockers, stock injectors, stock MAF,
70mm edelbrock tb and elbow, trick flow intake upper and lower manifolds,
Mac shorties, bbk cai, msd pro billet dizzy, mad 6al2 box

Originally set it so car idles at 900rpm,
When the engine gets to temp and I either drive it or rev it, the engine only comes back too 1100rpm..

I was told this is the sign of a vacuum leak and to use the propane from a torch to find the leak.

Whatcha guys think?
Thanks.
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Old 05-18-2014, 10:27 AM   #2
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Old 05-18-2014, 10:59 AM   #3
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Yeah, you can try that. I've always just used starting fluid. But most of the times I've had idle problems in a ford, it's been the idle air control valve.
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Old 05-19-2014, 10:07 AM   #4
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Thanks for the help dude
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Old 05-19-2014, 12:37 PM   #5
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Def thinking its the iac valve,
Propane didnt get it to rev up.
Gonna try cleaning the iac up with carb cleaner
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Old 05-19-2014, 01:07 PM   #6
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I'd guess it has something to do with the IAC malfunctioning too. While you're cleaning it up, you might as well pick up some MAF cleaner and clean that as well. It's probably not the lead cause of your problem, it could amplifying the issue if the MAF is dirty.

Good luck and let us know how you make out!

Shane
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Old 05-19-2014, 07:50 PM   #7
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Run your codes also.
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Old 05-25-2014, 06:02 PM   #8
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Pull the Air line off your Master Cylinder & Blow Cigar smoke through it. If you have a Vaccum leak the smoke will come out of the leak.
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Old 05-25-2014, 08:26 PM   #9
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Monte?
Cohiba?
Og kush?
Lol
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Old 05-25-2014, 10:39 PM   #10
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Take your pick !!! Something I learned on U-Tube & it works.
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Old 05-26-2014, 04:37 AM   #11
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Sounds good dude,
Thanks for the help.
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