1994 SC400 won't start
 

For the past couple mornings the car would crank a long time before starting. I thought it was just the cold because it would start fine when I would be leaving work later in the day.

This morning it cranks strong but won't start at all. The fuel pump is not running but when I jump the FP and B+ I can hear it run but still no joy on the car starting. All my searching seems to only find issues where jumping gets the car running.

I'm not sure what to check next. Could something like a crankshaft position sensor or coil pack being bad keep the car from even running the fuel pump?

Coil pack, preferably the drivers side coil pack. Are you saying you bypassed the fuel pump control ECU?

Thanks for the help. Yes, I bypassed the fuel pump control ECU and could hear that it started running and wasn't before that.

It started raining so I will continue diagnosing tomorrow. I'm planning to check for spark next. Is there an easier way to test the coil packs that I missed?

Update: I checked for spark on both sides and getting nothing. That makes me think the coil packs are fine. I replaced one about a year ago and I can't see them both failing at the same time, though anything is possible.

Beacuse of that, I'm thinking the ECU is the problem. The budget is pretty tight right now. Does anyone know a way I can test to make sure that I need to replace the ECU before I drop a bunch of money on one?

Upon further investigation, it could be your ECU, but it also could be something small. Like a fuse. Go ahead and grab a diagram off the net of the fuse boxes and locate fuse 30a specifically for EFI. If that fuse is blown, slap a new one in there, give the car a crank, and see if you have power to the fuel pump. GL with the SC! :thumbup: