SewWhat

Hello, I am hoping someone can help me, I wrecked my 93 sc400 but engine seemed to be fine, it was still running after impact and i drove it home! So I picked up a 92 sc400 with a blown head gasket, which I removed along with transmission and ecu, thanks to good instructions found here! Also I did get the 92 with BHG to start briefly before pulling engine, not sure if thats important but felt that its worth mentioning. I then drove my wrecked 93 sc400 (still running fine) to the garage im using to do the work, I then pulled engine, trans and ecu from 93 sc400 and mounted trans from the 92 to the good 93 engine, installed and now it cranks over as it always did in other car but wont start.
I've checked fuses, it is getting fuel, I've checked all connectors, plugs ect, I have read and think im aware of the most common things related to the "not starting" issue and will continue to search but havent found anything specific to my situation yet

Im wondering if there is something i might have missed, overlooked, or just any advice would be a great help!

Thank You!

Shrugy

iTrader: (12)

Was the ECU that you pulled from the vehicle surely working?

and does a check engine light illuminate when the key is in the ON position?

I have the same issue and its related to my ECU.

Also I would check out your ignition switch, and EFI Relay.

I got these replaced, and was fixed until my ECU went.

Hope I helped!

Ali SC3

iTrader: (10)

Welcome to CL, please try and post in the proper sub forum. moved to maintenance section.
so you used the 93 harness motor and ecu, and it connected to the 92 body harness with 92 transmission? sounds like it should work check for spark maybe and work from there. I think some years have cold start injector and others don't but I would think you can still get it started without it.

Dream36

92-93 are completely changeable. Swap ECUs and give it a try. Then check fuses and relays. If will having issues check your spark lines (and coils). Since it's getting fuel and air, it's spark or timing.

jjpark712

iTrader: (1)

Three things u need to start.
Fuel, spark, compression.
Probably missing one of them.