Quote:
Originally Posted by hamsterpower
civic dx ecu 93 | eBay
93 civic dx ecu from Ebay, many at $50. Avoid JDM ecus for 2 reasons- 100 octain fuels and no obd in some. If you are lucky and have a helpful dealer (I know, right...) they will sometimes do just the diagnostic and help you find the problem to fix elsewhere.
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Thanks ! I should have checked Ebay first. ( Dooop ! Why didn't I do that first !
)
I purchased the ECU you linked to. Hopefully it's a good one.
I went ahead and did some testing with my ECU. I slit the wiring that leads back to the fuel pump and ends up at the ECU. I slit the wires about an inch away from the ECU harness.
When I unplugged the Main Relay and jumped the Main Relay harness, the fuel pump kicked on but there was
no current at the wiring to the ECU.
When i plugged the Main Relay back in, there was a
full 12 Amps of current.
( both had 12 Amps ... or just shy of it due to a tired battery )
This would seem to indicate that the current makes it to the fuel pump if it is routed around the ECU by jumping it as i did right ?
I'm assuming this indicates a bad ECU ???
We shall see if this fixes the problem.
The board looks to be in perfect condition, but there is a small spot that looks suspicious. I have seen images of ECUs that short out at this exact area , so i was suspicious.
I plugged it back in and tested it - dead. Soldered the area and tested again - dead.
oh well.
