wonder what's going on, then. there's almost certainly an interruption in power or ground to the ECM during WOT events. i'd keep examining wiring and see what's going on. there's nothing else in your logs indicating trouble except the complete shutdown of the computer during WOT.
Whatever it is it has something to do with load I think, It will go WOT in neutral with no problem. Think it would be worth trying a different PCM? Also fuel pressure drops and rises from 40psi to 30psi back 40psi in tune with the surging which is probably due to the PCM shutting down becuase ive replaced the pump regulator and filter. Not sure if that info is of any help but thought id add it.
Constant power is coming from the starter to pins 15 and 31 on the black connection. Ignition power is coming from the stock fuse block into an aftermarket fuse block and into Pin 30 on the black connector, and Pin 3 on the Blue connector.Originally Posted by steveo
Do you know if the sensor grounds are grounded by the PCM? All 4 of my PCM grounds are grounded but neither of my two sensor grounds are...
your power wiring sounds good.
your 'sensor grounds' are grounds for the sensors themselves, they're provided by the ECM and noise filtered or referenced or whatever. they don't connect to chassis ground. don't use them as a ground except for with sensors as intended (in all seriousness, seen that fry an ecm)
in a factory configuration; two of the ECM grounds end up at the coil 'stud' (red 18 and blue 1), and the other two end up on the passenger side engine block (red pin 2 and grey pin 32). i imagine the block ones are the low noise, due to distance from the coil, and the coil ones are for high load? who knows.
i've grounded them all to a common ground block on my car, then the ground block to the accessory bracket with welding cable. never noticed a difference. my car runs perfect and all my signalling seems clean.
i wonder what's goin on? this has me scratching my head. very interested to see what it ends up being.
if a loose wire isn't getting yanked, maybe something ignition power related is hitting ground?
i can't see anything but physical wiring faults causing the ecm to just shut right the hell down during WOT events.
i'd say maybe try flashing a new bin or something, though, in case something horrific is going on there... but i also don't recommend flashing your ecm if you have suspicious wiring shit going on.
FIGURED IT OUT!!!!!! The hot battery wire going to the starter had 3 inches of exposed wire, arcing most likely to the header.
there ya go. had to be something hitting something.FIGURED IT OUT!!!!!! The hot battery wire going to the starter had 3 inches of exposed wire, arcing most likely to the header.
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