Originally Posted by Frango100
Crank and cam sensors are known to give problems when getting old.
I would first get a scan of the PCM to see if there are any fault codes stored.
Agreed, although a condition considered "normal" wouldn't be stored in the
The fuel pressure sensor and the regulator are also suspects.
Depending on the physical condition, could be something weird like the transmission park lockout sensor. Or, if there is an aftermarket ignition disable start with that--many were crap.
If you can get it to fail, a factory service manual and voltmeter, plus a few jumpers while it is in fail condition can help narrow it down a lot. I had to go so far as to take an extra relay and remove the innards and create jumper points to finally prove to a dealer that yes, the !@!#!@ ignition switch can and does fail [particularly if helped by a junk aftermarket security system that caused heat corrosion]