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Car Feels Ugly After New Turbo Install.

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Boostin GST

15+ Year Contributor
151
1
Aug 29, 2004
San Antonio, Texas
All this after 18g install. I have gotten rid of all the oil leaks and hopefully all the boost leaks. Mod list in profile. except for 18g since i just installed and a type s instead of type h bov now.

1. Rough idle no matter how long it warms up. It jumps up and down and sometimes almost dies. Especially when I am slowing down and drop it to nuetral.

2. Air/Fuel Reads very lean or goes blank. When Im cruising it without pressing gas it will sometimes read lean or go away. If I tap on the gas after it reads lean and then goes blank again. While driving it is always blank.

3. Whinning comming from car. Heard a whine coming from car and it not air filter and turbo noise. Mostly when Im starting to boost.

4. Car Wont boost as easily. If I press on gas it will slowly rise and maybe get to 10psi and noise starts to sound. Vac reads close to 30 instead of 24 or so like before.

What could it be and what should I check? Was thinking dead o2 sensor? Boost leak maybe. Please put them in order of most likely to least likely.
 
Agreed venting to atmosphere is a bad idea, and if your bov is leaky, your car will run like crap

Pressure test your intake as well

Matt
 
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