[CraigT]

06 2500ccsb tuned with duramax tuners efi live. Lifted 8" . The truck idles normal in park when I put it in gear the turbo vanes go to 70% and I have to stand on the brake to keep it from moving. In reverse I let off brake just a little and it starts spinning tires. Cts2 says throttle position is 0%. Replaced vane position sensor due to code and that didn't fix the problem

 

[CraigT]

Any ideas on what system to check out? Fuel pressure regulator? Transmission?

 

[SilverGorillaLML]

Fpr wouldnt do that. Sounds like a converter issue

 

[CraigT]

Converter is not locking up.

 

[Shibby6600]

Read the manifold air pressure and MAF sensors. For some reason the ECM thinks it needs to build boost, probably because a sensor somewhere is giving it bad information. If the MAP is reading really low in park, like 3-5 psi then it could be the sensor.