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Boost leak symptoms with blow thru mafs?

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AL92

15+ Year Contributor
933
4
Dec 12, 2003
regina, SK, Canada
I have gm maf in blow thru configuration. I am getting some symptoms that might be a boost leak. Its not supposedly very easy to test for boost leaks as the normal tester is not supposed to work on my ball bearing FP turbo. I have used smoke machine at garage to test in the past.

The symptoms are the car is boosting up but seems to backfire and sputter a bit at higher revs. I thought with blow thru configuration the driveablity would be unaffected with a boost leak in front of the maf. I have had a boost leak behind the maf before and it made it so the car would not start. My idle is steady and the car seems to not sputter and backfire as much at the higher rpm if I don't hold the throttle right to the floor.

I have full dsmlink to log and tune with .Are there any thing that would show boost leaks in the logs?
 
why not just hook a boost leak tester to the intercooler pipe and test?
 
No have a big enough one.But pretty sure I read that a few times .Maybe can call up FP and asked them.
Anyone boost leak tested an FP 3052 or 3065 BB normally? I think will still go for smoke machine test next week as its super easy to see the smoke.Last time found leak at intake manifold. Smoke made it simple.
 
A boost leak test on the UICP should indicate weather or not you have a boost leak before the MAF.
 
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