[N55lif3]

Hi all. Yesterday I got a new intake manifold and put it on because the holes in my previous one that sat the throttle body bolts were stripped.

After putting everything back together I cleared all the codes and started the car. The moment I drove out the car stalled randomly at a stop sign. Every time little throttle was applied in first gear the car would die out unless you gave it more. I checked the codes and got an overboost code.

I removed and plugged back in all MAF/TMAP/Absolute pressure sensors and drove to log. I drove on an 8 psi map and the log I got showed a lot of flunctuation of overboost past the target.

So I thought to try an OTS MHD Stage 2+ map and see what would happen with more boost. Keep in mind I have a pure stage 2 so I know the map has horrid timing and wgdc targets but I did it for testing sake and because I don’t have a custom tune for pump gas. After doing a pull the map targeted 16 and overboosted TO 29PSI before my car cut power completely for a second. I checked all vacuum lines, I cleaned all sensors. The throttle body and manifold are both torqued to spec. I’m lost right now. This never happened before. A crack in the manifold? It was used but I visually inspected and cleaned everything before putting it on

https://datazap.me/u/n55rei/log-1594...og=0&data=3-10

[slow.e9x]

Myself and a few others who are on MHD 2+ OTS are getting massive overboost as well.

Provided MHD a log but have yet to hear back. Car behaves normally if MHD is removed completely.



Do you have a log from 2+?

[TheGoodTheBadTheUgly]

I have stock turbo, but here you go:

https://datazap.me/u/thegoodthebadth...=0&data=4-5-21
https://datazap.me/u/thegoodthebadth...=0&data=4-5-20

At 28 PSI my car chokes as if it misfires. This never used to happen with earlier versions of MHD OTS Maps.

At least you have Pure Stage 2 so it's worth and essential for you to go with a custom tune. But for my part, spending 450$ (CAD) for a custom tune with no assurance it will fix my issue is complete shit.

[N55lif3]

Originally Posted by slow.e9x

Myself and a few others who are on MHD 2+ OTS are getting massive overboost as well.

Provided MHD a log but have yet to hear back. Car behaves normally if MHD is removed completely.



Do you have a log from 2+?

https://datazap.me/u/n55rei/log-1594792066?log=0&data=3-4-10&zoom=636-863

[N55lif3]

Fixed my issue. Replaced boost solenoid and also relieved my wastegate vacuum line from its metal clip as it looked like it was being pinched by it. I dont know which one fixed it but no more overboosting or oscillations.

[slow.e9x]

I replaced all vacuum lines and boost solenoid from fcp. Didnt fix the issue for me.

Do you have the gfb dv+? If so do you have the extra spring installed?

[N55lif3]

Originally Posted by slow.e9x

I replaced all vacuum lines and boost solenoid from fcp. Didnt fix the issue for me.

Do you have the gfb dv+? If so do you have the extra spring installed?

Whatever came with the kit was installed on my car

I was pretty lost when trying to resolve it but I was thinking of checking my cp connections because a boost leak could cause overboosting after a certain pressure