I've been passively reading your thread, as I'm not, nor have I been an 
NB owner. 

I'm sort of surprised that you are having such problems, in that they 
are intermittent/difficult to troubleshoot with an OBD-II computer, 
given how much "better" they are in terms of datalogging/etc.  I would 
reinforce what others have said, that is, if this is a repeatable OBD-II 
event, you should borrow/get a Palm/PC datalogger and watch what is 
going on and that may give you a better idea of what to troubleshoot.

In RX-7 (FD3S) land, some of the ECU wires run under the fender-liner 
and in rare cases, you can rub through the liner and the wiring 
harness.  One car I worked on, had this happened and that was the last 
thing I checked (the car was intermittent to start but once started, it 
would run okay).  The wires that were affected were the two shielded 
wires for the crank position sensors.  I tried my best to repair them 
(cut and splice new shielded wires, and I'm pretty good with wiring) but 
the repair just would NOT take and as a result, the car could not 
run/start on a consistent basis.  I handed it back to the owner and told 
him that he needed to replace that harness to guarantee things to work 
right or bypass the faulty wiring.

If you are running across the same issue, of a damaged crank wire, I 
would say that you need to run new shielded wires from the ECU to the 
CPS, if you don't want to replace the entire harness, based on my repair 
experience, although you may have better luck, it just depends on the 
circumstances.

--Ashraf
>
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