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mo_hish · 06-09-2010, 07:49 PM

1993 240sx s13 (97 ka24de w/ s13 distributor)

Drove the car this morning to the store, parked it... 5 min later came out and the car wouldn't start. Popped the hood, and found the fuse box cover off, and the ignition coil ground was off. Put the cover and ground back on and wouldn't start.

What I know:
CEL won't come on
No spark
Fuel pump wont prime
Relays and fuses are good
ECU only getting 1.4v at power pins (pins 47 & 38.)
When I jumper 3&5 at the EGI relay, the CEL comes on and the ECU gets power (full 12v at power pins) but wont start
When EGI is jumpered, fuel pump will prime when I unplug the distributor
No spark with or w/o EGI relay jumpered
Pin 36 (Ignition) gets 12v with key in on position
Pin 34 (Start signal) gets 10v while cranking
SAFC still turns on
Opened the ECU and everything looks/smells fine

I'm lost. I'm assuming it's a wiring problem and I'm considering getting another harness, but I don't want to get one if it's not even going to help...

06-09-2010, 07:49 PM	#1
mo_hish Zilvia Junkie Join Date: Mar 2009 Location: Philadelphia Posts: 463 Trader Rating: (7)	No ECU power... No start 1993 240sx s13 (97 ka24de w/ s13 distributor) Drove the car this morning to the store, parked it... 5 min later came out and the car wouldn't start. Popped the hood, and found the fuse box cover off, and the ignition coil ground was off. Put the cover and ground back on and wouldn't start. What I know: CEL won't come on No spark Fuel pump wont prime Relays and fuses are good ECU only getting 1.4v at power pins (pins 47 & 38.) When I jumper 3&5 at the EGI relay, the CEL comes on and the ECU gets power (full 12v at power pins) but wont start When EGI is jumpered, fuel pump will prime when I unplug the distributor No spark with or w/o EGI relay jumpered Pin 36 (Ignition) gets 12v with key in on position Pin 34 (Start signal) gets 10v while cranking SAFC still turns on Opened the ECU and everything looks/smells fine I'm lost. I'm assuming it's a wiring problem and I'm considering getting another harness, but I don't want to get one if it's not even going to help...