I'm trouble shooting a ghost. I found a killer deal on a '90 sc manual, the only problem is it wasn't running when i bought it. The previous owner said the car started to run poorly and the condition got worse as time went on till he parked it 5 years ago. There is a fairly new engine in the front and someone did a good butcher job of the ABS controller wires, patched in an external relay... That's another problem for later.
I've already replaced cam sensor, crank sensor and DIS module. Dropped the fuel tank and emptied. New fuel filter. Just finished replacing the fuel pressure regulator and upgraded fuel rail hoses. Everything is back together and the engine cranks and only cranks. Every so often I get slight hint of spark and nothing.
I have a code scanner hooked up and the test mode on, KOEO. Then turn the key to on position. I hear the fan cycle on and off and some relay clicks in the back. Next I crank it and it slowly starts. It keeps a rough idle for 3-5 sec and dies. codes I've seen pop up are 6,10,11,90
My question is: Could this be a bad ECM? Is there any way of testing the ECM? Any thoughts of troubleshooting elsewhere?
I've already replaced cam sensor, crank sensor and DIS module. Dropped the fuel tank and emptied. New fuel filter. Just finished replacing the fuel pressure regulator and upgraded fuel rail hoses. Everything is back together and the engine cranks and only cranks. Every so often I get slight hint of spark and nothing.
I have a code scanner hooked up and the test mode on, KOEO. Then turn the key to on position. I hear the fan cycle on and off and some relay clicks in the back. Next I crank it and it slowly starts. It keeps a rough idle for 3-5 sec and dies. codes I've seen pop up are 6,10,11,90
My question is: Could this be a bad ECM? Is there any way of testing the ECM? Any thoughts of troubleshooting elsewhere?