Originally Posted by
johnny99
Charlie asked, what can be done incorrectly when fitting an ECU, well plenty, bad earth, parts of harness running along parallel to plug leads, no shield on the crank or cam sensor, bad connections, etc.
I agree with ECU monitor, in the way he said the crank sensor signal should be checked. I don't want to start an arguement with anyone, and repect to each poster, but this is a very interesting thread.
John
I believe that Luke is experienced enough to not install an ECU or misdiagnose an ECU with the problems you mention.
Crank sensor - no as ECU was tested in isolation.
Bad earth - no. Bad connections - no. All wiring new and shielded and run correctly through the car, and not part of the ECU test as it was not tested on the car.
If you take an ECU off the car and stick a signal into it via its connector pins and you see the ECU firing random signals at a certain RPM how could you think that there is a sensor or earth problem. THE ECU IS NOT ON THE CAR - it is sitting on a desk in an office.
Charlie