You may have more than one problem. To narrow it down this is what I suggest:
Check the coil for spark, if there is no spark, the ignition systen could have problem.
If there is spark at the coil, check for crack distributor cap, carbon traks in the rotor, broken rotor, deffective or disconnected coil-to distributor high tension wire, badly retarded or avance ignition timing.
The computer needs to have power and ground. A fast way to check that is the way you did, hooking it up to a scan tool, but couldn't communicate serial data while the engine was cranking.I agree with you that the computer may be dead but give more chances and try like in old days. :|
In the 1980s, technicians used a voltmeter to test reference voltage while cranking the engine or with the key turned to engine off. To do this, they disconnected the TP sensor and mesure the reference voltage wire and the ground with a digital voltmeter. If the voltmeter showed reference voltage, the computer wasn't dead. The procedure work fine except you need to know which wires to test and you need to understand that a code for TP sensor would be genrated as result of the test.
Good luck :wink:
Saturday, January 13th, 2007 AT 9:32 AM