92 Mx3 4cyl sohc starts but won't stay running

[oilsandsoilfan]

Hello all, looking for a little help on solving problem with 92 Mx3 4 cyl sohc.
I bought this car for my son and initially it was not running at all, I have replaced disty as it had no spark and fuel pump as it was not working either. Car will start but dies about a minute after starting, I have read through previous posta and have tried pretty well everything I could find that was suggested for this condition. The car will run just fine if I run a jumper from fp to ground in the diagnostic connector but as soon as I pull the jumper the car will die. Vaf checks out, no vauum leaks all grounds have been cleaned, tried 3 differant ecm's as it came with spares and condition stays the same. Tried two differant disty's no change, new coil no change, timing is o.k.

Any Ideas.

Thanks in advance.

[Ryan]

sounds like a distributor problem again. Not uncommon to have a few defective units in a row

does it stay running as long as it wants with FP and GND jumped? I'm pretty sure its a sensor in the distributor that opens the FP relay the same way that the jumper would. It is on the v6's at least.

[oilsandsoilfan]

Yeah it runs great while fp and ground are jumped, have tried 2 differant disty's with the same results. But it would not surprise me if both are faulty as I have read it is not uncommon to have to go through multiple disty's before getting one that works properly. I also read that one of the coolant sensors can cause this same issue but have so far not been able to find test specs and locations of all three.