ls2 driving problem
Thread Starter
Intermediate
Joined: Oct 2011
Posts: 28
Likes: 2
ls2 driving problem
hello guys i have a corvette c6 engine in my chevy truck
it starts right up and keeps running fine but if i put it into drive
there is no power and it runs rough no power at all
no codes and 6k on the engine, new injectors and 58/60 psi fuel pressure and new spark-plugs and wires
there is also no vacuum leak the transmission is a brand new 700r4
the exhaust has no cats but has bank 1 and bank 2 ho2s sensors only the first ones and its running in a closed loop
any suggestions?
thanks
john
it starts right up and keeps running fine but if i put it into drive
there is no power and it runs rough no power at all
no codes and 6k on the engine, new injectors and 58/60 psi fuel pressure and new spark-plugs and wires
there is also no vacuum leak the transmission is a brand new 700r4
the exhaust has no cats but has bank 1 and bank 2 ho2s sensors only the first ones and its running in a closed loop
any suggestions?
thanks
john
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,629
What ECM and what BCM. IF E40 and C6 BCM, going to have problems that is putting the car into limp mode since will bank that your missing some other C6 type modules that the BCM is looking for. If E40 and say non C6 BCM, that will bank that the other BCM is not sending the ecm the data is looking for, and again, putting motor into limp mode.
So on that note, would be better off with an aftermarket ECM that can be used stand alone for the motor.
So on that note, would be better off with an aftermarket ECM that can be used stand alone for the motor.
Thread Starter
Intermediate
Joined: Oct 2011
Posts: 28
Likes: 2
thanks for your answer
the ecm was flashed by stm performance to a stand alone and according to my obd reader there isnt anything that the ecm is looking for thats not there
i have the same setup in another car that runs fine i overlooked it for two days and can't find the problem
the ecm was flashed by stm performance to a stand alone and according to my obd reader there isnt anything that the ecm is looking for thats not there
i have the same setup in another car that runs fine i overlooked it for two days and can't find the problem
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,629
Easy enough to turn off the rears sensor in the tune to solve that one, but that should still not put the car into limp mode.
Hence ECM is looking for something, it not right, and why the motor is going into limp mode.
Hell, it could be something stupid like a later model TB that opens the reverse way of the 05, and why the car is going into limp mode. If ecm is set up for 05 TB, then the vane of the TB should be silver. If the vane is gold, it's a later model unit and will open the other way of the 05 unit instead.
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