Electrical nightmare Ecu issue! SOLVED 2017
Hello, very new to using forums period. Normally just searched through them.
I have a 93 civic dx (w/2000 dx single non vtec engine using same manifolds ecu sensors etc.)
Having an intermittent problem with the fuel pump not priming before cranking.
I am good with electricals, and have narrowed it down to the ecu not sending the ground signal to the main relay that powers fuel pump relay coil.
Also I am getting 12v to the yel/blk ecu input right @ the ecu from the main relay, when key is on.
Does this mean the ecu is bad?
sometimes it will just work out of the blue without touching wires or anything, after a period of about a minute or so goes by with switch on.
Sometimes it won't work at all. Sometimes it works fine Please!!! help lol.