Quote:
Originally Posted by brndck
ok you need to do some actual testing.
- theres TWO coolant temp sensors. one is for the instrument cluster. one is for the ECU. which one did you replace?
-what ecu are you running? what modifications are done to the engine? have you checked compression/leakdown? have you done a test for blown head gasket? is there white/grey/black smoke out of the exhaust? what do the plugs look like?
TONS of shit you should be checking, and you def need to fix that alternator before trying to further troubleshoot.
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i replaced the temp sender for the ECU, sorry for not clarifying. it was the one with 2 wires going to it.
the engine is a bone stock S13 SR with the emissions deleted. has the heat fins on the head indicating it was a later red top. the ECU has the number "62" on it. not sure what that means. i though i took a picture of it but cant find it. will run out right now and get a picture to post. i have not done a compression test or leak down because the motor is not smoking and runs fine when you fist start it up. theres no oil or exhaust fumes on the radiator. the motor had 26k when swapped in and the last owner put 6k on it. the plugs were recently replaced so i couldnt really guage much off of them. they looked brown, but nothing unusual. previous owner also replaced igniters with new OEM ones in an attempt to solve the problem.
side note i also tried to pull the codes from the ECU, but when the dash does have power there is no check engine light and the diagnostic mode doesn't give any codes.
*EDIT* here's the ECU
https://photos.app.goo.gl/CNRiRa3BkG5BwNs2A