William McNett
Member
I've had issues with this since I bought it last year. I'm about to buy a reman / new long block but I'll keep scratching my head. :mad2:
I've replaced the timing chain and sprockets last January and the CPS, New GP's, relayed the OPS, replace the LP, had the injectors tested, had the injection pump tested, rebuilt the turbo, eliminated the EGR, installed new 4" exhaust, new fuel filter, new HO water pump, fan clutch, Duramax 21" fan, I'm sure I'm forgetting stuff.
I've searched the net, found others with similar problems but have yet to find a solution to mine.
I thought I had somehow installed the pump off 1 tooth retarded because it ran great cranked about 5mm toward the drivers side but after tearing it apart that wasn't the case.
Just had the valve covers off to check out the rockers, ran a cold compression test, fuel PSI at the pump is hard to read while running (gauge jumps all over real fast) needs a snubber but there's about 11 psi when I shut it off.
I started thinking I had a cracked block, blown head gasket, cracked head but with the CPS unplugged I start thinking not.
Now I'm wondering if there's a key somewhere that's sheared, didn't notice anything when I replace the timing chain.
Just ordered a ACDelco CPS to replace the Standard one I bought last December.
Here's some videos for your viewing pleasure
Cold Start
http://www.youtube.com/watch?v=oxV3MsLpwn0
Hot Start
http://www.youtube.com/watch?v=EGW_PLanHl8
Hot Start with CPS Unplugged
http://www.youtube.com/watch?v=m8bTcZv2kTc
Hot Start with Optical Sensor Unplugged
http://www.youtube.com/watch?v=UBYle_CB0Rw
I've replaced the timing chain and sprockets last January and the CPS, New GP's, relayed the OPS, replace the LP, had the injectors tested, had the injection pump tested, rebuilt the turbo, eliminated the EGR, installed new 4" exhaust, new fuel filter, new HO water pump, fan clutch, Duramax 21" fan, I'm sure I'm forgetting stuff.
I've searched the net, found others with similar problems but have yet to find a solution to mine.
I thought I had somehow installed the pump off 1 tooth retarded because it ran great cranked about 5mm toward the drivers side but after tearing it apart that wasn't the case.
Just had the valve covers off to check out the rockers, ran a cold compression test, fuel PSI at the pump is hard to read while running (gauge jumps all over real fast) needs a snubber but there's about 11 psi when I shut it off.
I started thinking I had a cracked block, blown head gasket, cracked head but with the CPS unplugged I start thinking not.
Now I'm wondering if there's a key somewhere that's sheared, didn't notice anything when I replace the timing chain.
Just ordered a ACDelco CPS to replace the Standard one I bought last December.
Here's some videos for your viewing pleasure
Cold Start
http://www.youtube.com/watch?v=oxV3MsLpwn0
Hot Start
http://www.youtube.com/watch?v=EGW_PLanHl8
Hot Start with CPS Unplugged
http://www.youtube.com/watch?v=m8bTcZv2kTc
Hot Start with Optical Sensor Unplugged
http://www.youtube.com/watch?v=UBYle_CB0Rw