15A ECU fuse keeps blowing!! Electrical guys jump in
#1
15A ECU fuse keeps blowing!! Electrical guys jump in
The car is a 92 SI. purchased just over a month a ago as a complete shell. Swaped in motor like 2 weeks ago. Car ran fine for 1.5 weeks then i was driving...car missed a couple of times and shut off. had it towed...check under hood fuse box, noticed 15A ecu fuse is fried..I replaced fuse, drove not even 100 Feet and the car shut off again. Sure enough it was the fuse again. Handed the problem over to my friend who's experienced with electrical...long story short after he did some investigation into it..He ran a new wire directly back to the main relay...incase the wire was pinched or something.
We thought that would be the end to it as the car drove fine for half an hour..then shuts off. Sure enough i check the fuse..it's fried. What now?? I hate electrical problems. Long and hard to fix. Thanks in advance.
We thought that would be the end to it as the car drove fine for half an hour..then shuts off. Sure enough i check the fuse..it's fried. What now?? I hate electrical problems. Long and hard to fix. Thanks in advance.
#8
Originally posted by kIeRaN
haha i had that exact same fuse go on me, its because my elongated O2 sensor got caght in the driveshaft and ripped it to shreds lol
wasnt so funny at the time
haha i had that exact same fuse go on me, its because my elongated O2 sensor got caght in the driveshaft and ripped it to shreds lol
wasnt so funny at the time
Originally posted by username
Replace ECU with test one from another car. See if that fixes problem, if not, get your wiring diagrams and start tracing!
Replace ECU with test one from another car. See if that fixes problem, if not, get your wiring diagrams and start tracing!
#9
why would you rip the dash out?
Before going all crazy here, check the wires at the ecu harness for shorts. I'd really check the power/ground wires, get an ecu pinout and start with that.
Before going all crazy here, check the wires at the ecu harness for shorts. I'd really check the power/ground wires, get an ecu pinout and start with that.
#11
Originally posted by zeeman
why would you rip the dash out?
Before going all crazy here, check the wires at the ecu harness for shorts. I'd really check the power/ground wires, get an ecu pinout and start with that.
why would you rip the dash out?
Before going all crazy here, check the wires at the ecu harness for shorts. I'd really check the power/ground wires, get an ecu pinout and start with that.
The circuit goes from the fuse back to the main relay. He's saying the ecu has nothing to do with it because when you turn you key...the main relay activates the ecu and once again..there's no connectivity between the fuse and ecu..All the engine grounds seem to be fine.. I've argued with him about other grounds, like for sensors and what...but he's saying that they wouldn't affect that circuit and pop the fuse...they'd throw a code for that specific sensor. Will keep you posted.
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