How to diagnose intake leak with HPTuners?
11-08-2008, 11:26 AM
#1
How to diagnose intake leak with HPTuners?
Hey, my truck is idling higher than it is supposed to and it surges a lot. Then sometimes it just idles normally. What would I log to see if there is an intake leak? I sprayed carb cleaner around the intake and I couldn't find a leak that way. Thanks for any help.
11-08-2008, 01:59 PM
#2
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look at the fuel trims. if air is entering the engine and not being measured by the MAF (a leak after the MAF), then you will be running lean and the VCM will be adding fuel to compensate, so look for high positive fuel trims.
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