Hey guys,
I bought my first duramax just a few weeks ago (previously married to cummins) and I'm still trying to figure out these VGT turbos, timing-gear driven water pumps, and all the other goodies in a duramax. Since buying this thing I've had a few issues surface that I have researched and tinkered with but have not had any significant findings. First of these being a few codes P003A, P0402, and P0676. My main concern is the P003A. Previous owner put on a used turbo after the factory turbo began giving some issues. I took my truck and had the relearn done at my local dealership and was informed that my vanes were 100% closed. I then went home, removed the VPS and made sure the plunger on the sensor itself was smooth and not seized. I then went for the plunger on the turbo, which I expected to be seized in place. It stays all the way out to the end of the tube even when idling, but, with the truck off, I can push it in fairly easy. When driving with a little spunk, i get a lot of compressor stall when letting off a high boost run. Truck makes good boost but it is slow to make it at first. Do I need a new sensor and another relearn, or am I missing some information somewhere? Any help would be appreciated.
2007 Chev 2500HD Classic LBZ 2wd
Bulldog triple dog gauge/tuner
AFE 4" straight downpipe back
K&N intake
I bought my first duramax just a few weeks ago (previously married to cummins) and I'm still trying to figure out these VGT turbos, timing-gear driven water pumps, and all the other goodies in a duramax. Since buying this thing I've had a few issues surface that I have researched and tinkered with but have not had any significant findings. First of these being a few codes P003A, P0402, and P0676. My main concern is the P003A. Previous owner put on a used turbo after the factory turbo began giving some issues. I took my truck and had the relearn done at my local dealership and was informed that my vanes were 100% closed. I then went home, removed the VPS and made sure the plunger on the sensor itself was smooth and not seized. I then went for the plunger on the turbo, which I expected to be seized in place. It stays all the way out to the end of the tube even when idling, but, with the truck off, I can push it in fairly easy. When driving with a little spunk, i get a lot of compressor stall when letting off a high boost run. Truck makes good boost but it is slow to make it at first. Do I need a new sensor and another relearn, or am I missing some information somewhere? Any help would be appreciated.
2007 Chev 2500HD Classic LBZ 2wd
Bulldog triple dog gauge/tuner
AFE 4" straight downpipe back
K&N intake
