So I know I'm still considered a new guy but I do have some street cred on duramax forums if yall hate on me. I have done a couple of these conversions with little to no trouble and some not even having to be retuned to run well. I have been putting in stock lbz pumps.
This is a 2016 cab and chassis that had the classic cp4 failure. I installed lbz pump and new lml injectors and started and ran like a top, but anything above +- 10percent throttle it will stutter and stumble and shake and almost die out. Sometimes it will. I thought, well maybe it needs retuned. Nope... same thing. I isolated the pulp return line to rule out a kink, isolated the fuel tank and sucked fuel out of a bucket into the fuel filter, no codes, desired and actual rail pressure are very close through it all. I replaced the fpr on the pump to be sure, and removed the regulator on the rail and cleaned. Wasnt very dirty....
I sweated on this beast all day and am out of gas on it. Wow. Does anybody have some suggestions. At idle it will rev to 3k for a second then cut out sputter and rattle and almost die. Then with it floored will hold at about 1500 to 2000 rpm but runs awful while it does. Purrs like a kitty at idle. Thanks
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This is a 2016 cab and chassis that had the classic cp4 failure. I installed lbz pump and new lml injectors and started and ran like a top, but anything above +- 10percent throttle it will stutter and stumble and shake and almost die out. Sometimes it will. I thought, well maybe it needs retuned. Nope... same thing. I isolated the pulp return line to rule out a kink, isolated the fuel tank and sucked fuel out of a bucket into the fuel filter, no codes, desired and actual rail pressure are very close through it all. I replaced the fpr on the pump to be sure, and removed the regulator on the rail and cleaned. Wasnt very dirty....
I sweated on this beast all day and am out of gas on it. Wow. Does anybody have some suggestions. At idle it will rev to 3k for a second then cut out sputter and rattle and almost die. Then with it floored will hold at about 1500 to 2000 rpm but runs awful while it does. Purrs like a kitty at idle. Thanks
Sent from my SM-G889A using Tapatalk
