Check for power to the coil from the PCM at the 4 pin coil connector using a test light. Don't touch the dark green/orange wire to ground. As the engine cranks the light should flash. If none flash the coil drivers in the PCM aren't supplying power to the coil. One reason could be the ASD circuit is denergised because the PCM isn't seeing the cam or crank signal. To confirm check for power at either O2 sensor. If there's no power it confirms the ASD relay is denergised. Check cam and crank sensor wire continuity and reference voltage. If there is power at the O2 sensor but the coil has no power, it's likely a bad PCM unless you have an open wire or corroded connection - your suspision.
You can get rebuilt PCMs for $250 - $350 at several web sources. Autozone has them for about the same.
Last edited by RIP; 05-11-2011 at 09:35 PM.
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