Till
June 15th, 2005, 10:11 AM
Hi,
as I mentioned in a previous thread ( http://www.efilive.com/forum/viewtopic.php?t=1712 ), I am installing an individual throttle body manifold in a C5 corvette. And I keep running into problems.
I got the car to start and run with a stable idle, turned of the engine, and got the "reduced power" message in the DIC. Error codes are P0606 and P1518. The service manual says that this means the PCM needs to be replaced. Well, I tried reading the PCM - didn't work. Writing a calibration - didn't work either. Rewriting everything - same thing. Took out the PCM, and hooked the PCM up to the OBD-II cable and a battery outside the car (with a special harness) - same problem.
Well, I got a new PCM, and everything was fine. I had programmed a 2001 OS into the old PCM, and I wondered if that may have been the reasons for the problems. I flashed my old 99 OS into the new PCM, just to be save.
Today the new PCM died. The engine hadn't even run today. We had just pushed the car to the lift. Again code P0606 and P1518.
I wonder what the reason might be. The cable going to the TPS had to be pulled a bit, so there may be a short somewhere. We worked on the TPS, so that may malfunction. But why was it fine after installing a new PCM?
With FlashScan, I made changes in the ETC tables. Those have a red symbol, and it only shows after the laptop was connected to the PCM. Are the changes to the ETC tables in the PCM, or in the TAC? Maybe the TAC malfunctions, and in some weird way takes out the PCM?
I am not sure what to do next. I have been told that there are plenty of problems with the TAC in older C5s, and that the error messages are sometimes incorrect. Maybe I should get a new TAC in any case.
Does anyone know where I could get a PCM? In Germany you can only buy it in exchange for a broken PCM, you can't just buy one to keep it in stock.
Till
as I mentioned in a previous thread ( http://www.efilive.com/forum/viewtopic.php?t=1712 ), I am installing an individual throttle body manifold in a C5 corvette. And I keep running into problems.
I got the car to start and run with a stable idle, turned of the engine, and got the "reduced power" message in the DIC. Error codes are P0606 and P1518. The service manual says that this means the PCM needs to be replaced. Well, I tried reading the PCM - didn't work. Writing a calibration - didn't work either. Rewriting everything - same thing. Took out the PCM, and hooked the PCM up to the OBD-II cable and a battery outside the car (with a special harness) - same problem.
Well, I got a new PCM, and everything was fine. I had programmed a 2001 OS into the old PCM, and I wondered if that may have been the reasons for the problems. I flashed my old 99 OS into the new PCM, just to be save.
Today the new PCM died. The engine hadn't even run today. We had just pushed the car to the lift. Again code P0606 and P1518.
I wonder what the reason might be. The cable going to the TPS had to be pulled a bit, so there may be a short somewhere. We worked on the TPS, so that may malfunction. But why was it fine after installing a new PCM?
With FlashScan, I made changes in the ETC tables. Those have a red symbol, and it only shows after the laptop was connected to the PCM. Are the changes to the ETC tables in the PCM, or in the TAC? Maybe the TAC malfunctions, and in some weird way takes out the PCM?
I am not sure what to do next. I have been told that there are plenty of problems with the TAC in older C5s, and that the error messages are sometimes incorrect. Maybe I should get a new TAC in any case.
Does anyone know where I could get a PCM? In Germany you can only buy it in exchange for a broken PCM, you can't just buy one to keep it in stock.
Till