typexd

Recently swapped my rebuilt OBD1 LS (using the z6 harness) into my Si since I started getting rod knock on the z6, car has been running extremely healthy aside from having to replace the Main Relay since I wasn't getting power to the fuel pump.

Suddenly the car dies while I'm driving it under normal driving conditions. Performed a resistance test on the coil and it was within spec. Getting good amount of spark and is nice and white with slight blue tint. Fuel Pressure is within spec as well. Any ideas? I am starting to think it's possibly the ICM.

The car would crank but not turn over. Ambient temperature was around high 70s when the car died, but I went to fire it up in the evening and it suddenly fired up with no questions and the ambient temp was in the 50s (not sure if this might be related since the car had some time to cool down). Engine is completely stock aside from a password intake. All of the harness is untouched and unmolested and I have already tested all grounds for continuity and appear good.

Any ideas or thoughts would be of great assistance.

adamrich33

have you confirmed power to the fuel pump.

grumblemarc

iTrader: (4)

When my Prelude did this it was the ICM.

typexd

yeah got battery voltage to the fuel pump and i do have fuel pressure. my concern is that even though i checked the resistance on my coil and it ohmed within spec that it could still be bad seeings how i have seen it happen in the past.

adamrich33

i have read good resistance at cooler temps but once the engine bay warms up after running the resistance in the coil will go up causing it not to fire

typexd

thats what i figured. thanks a bunch. finally got it to duplicate crazy thing is that it did it after i got a remanned distributor cuz i figured its easier to just swap out the entire assembly instead of just replacing the coil when at some point or another im sure the ICM is going to fail. besides it came with a lifetime warranty.