2005 Duramax wont go over 2000 RPM
#1
2005 Duramax wont go over 2000 RPM
For more than 2 years periodically out of the blue the engine will not rev over 2000RPM! if you stop and turn the truck off and wait 2 minutes and restart it will go back to running fine, sometimes for a minute sometimes for a month. i took it to a dealer and they said it was the computer, egr, and egr cooler. I replaced them all and it made no difference. i have put over 50k miles on the truck fighting this , any Ideas? The truck has 215k and runs like new when this is not happening.
#3
#5
This happend to my brothers 01 LB7. He would be driving around normal nothing wrong. But as soon as he hit the pretty steep hill by our house and he would need to get on it, by the time the truck would hit 2nd or 3rd gear and hit 2000 rpm, it would startle really hard, a check engine light would come on, and he couldnt go above 2000. If he was real easy on it he could shift without going above 2000. But the problem stopped when he replaced the injectors when one finnaly stuck open at 160,000. But either way, the chevy dealer mechanic said its either injectors, fuel filter, or map sensor on your air intake.
#6
My 2003 did this aswell, it was because of a faulty CP3....
didn't throw any codes but a local diesel shop offered to replace my pump pro-bono if this was not the problem...
turned out it was the problem and my truck was fine after this...
i first became aware of the problem when i ran out of fuel, i would start up the truck and it would not rev over 2000rpm...
is it like the rev-limiter was moved to 2000rpm or does it pop and smoke??
because mine acted like the rev-limit was lowered to 2k RPM
didn't throw any codes but a local diesel shop offered to replace my pump pro-bono if this was not the problem...
turned out it was the problem and my truck was fine after this...
i first became aware of the problem when i ran out of fuel, i would start up the truck and it would not rev over 2000rpm...
is it like the rev-limiter was moved to 2000rpm or does it pop and smoke??
because mine acted like the rev-limit was lowered to 2k RPM
#7
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My 2003 did this aswell, it was because of a faulty CP3....
didn't throw any codes but a local diesel shop offered to replace my pump pro-bono if this was not the problem...
turned out it was the problem and my truck was fine after this...
i first became aware of the problem when i ran out of fuel, i would start up the truck and it would not rev over 2000rpm...
is it like the rev-limiter was moved to 2000rpm or does it pop and smoke??
because mine acted like the rev-limit was lowered to 2k RPM
didn't throw any codes but a local diesel shop offered to replace my pump pro-bono if this was not the problem...
turned out it was the problem and my truck was fine after this...
i first became aware of the problem when i ran out of fuel, i would start up the truck and it would not rev over 2000rpm...
is it like the rev-limiter was moved to 2000rpm or does it pop and smoke??
because mine acted like the rev-limit was lowered to 2k RPM
#8
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