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Discussion Starter #1
I’m trying to track down a boost leak somewhere on my ecuTek tuned car

My MAP (Manifold absolute pressure) Vs Boost Target has a 2.5 to 3 PSi variance as shown in my logs. My tuner has adjusted my target and the variance has stayed the same for the last 3 revisions. The variance is not normal as indicated by my tuner and pointing to a mechanical issue.

Boost leak tracked down some minor issues such as loose couplers to the intercooler, throttle body, BoV flange, and Intake inlet. I have tightened down every one of those connections and got rid of the replica BoV kit I had on my car. Turbos were recently replaced by dealership.

Anyone run into a leak with their cars? My next steps are smoke boost leak test.
 

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2018 Infinity Q50 Luxe
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15 Posts
I am currently experiencing the same issue. Were you able to track down the leak with the smoke test?
 

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pressure testing the cold side is always a good idea and finds leaks real quick, no smoke required. Problem is it requires getting a coupler with a compressed air fitting onto the turbo inlet's and space isn't the easiest.
 

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2017 Infiniti Q60 Red Sport AWD
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1,370 Posts
How about the BOV itself?
 

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Are the BOVs adjustable? Years ago I had a Greddy Type S that I had carelessly adjusted so it would "blow off" at lower rpms. This actually caused a boost leak and I want aware of it until I installed a Greddy Type R bov and the car ran very lean because of all the boost not being leaked ?. Ended up having to get a retune just from the BOV. I was also blowing head gaskets when I was trying to figure out what the problem was.
 
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