i have and 89 si hatch with single cam zc with obd 1 intake and dizzy ef si wire harness jumped to obd1 with po8. the ecu fuse keeps popping everytime i let off the clutch and put a load on the engine. engine idles fine and revs all day when is not in gear i need help

 

same here, cars fine all day and all, but last night it popped for some reason

 

any idea i let the **** idle for a good minute and jerked on all the engine harness and the under dash harness to check for and sorts to see if it would kill it but nothing...

 

maybe loose engine ground?

 

for my problem, i had my reverse lights unplugged because they werent working, and they hit the tranny casing..making them blow a fuse..i dunno keep looking around for frayed wires

 

A loose ground won't cause a short and won't blow a fuse.
A frayed wire or a shorted component will definately blow a fuse though. You'll have too look for a power wire from the ecu that is shorted to a ground source, or a component the ECU drives that is shorted causing the ecu fuse to blow. Don't worry about ground wires or even sensor wires, those don't carry any amperage and that's what blows fuses. It'll be a power wire to something or a component for sure.

These are hard problems to diagnose, so dig in man, good luck!

 

thanks for the help but everyone is just telling me stuff i already know im an ex nissan tech and ive asked a friend that works from honda and no one can figure it out i took out the engine harness un rapped it to look for any bad wires harness is fine

 

Okay, then the harness is good. But did you check maybe an out put that may be shorted and causing the fuse to pop. something that the ECU grounds. I haven't had this happen, but maybe an injector or a solenoid, or something of that nature. I may possibly be the computer itself. I would try to borrow a computer and see it that solves your problem, if not then I would go to town checking everything that the ECU handles.

Electrical problems suck man. Sorry, but good luck!

 

yea cause po8s grow on trees.. naw just kidding we're waiting to rull out the ecu last because it has to be something else i think the dizzy might be bad cause whatever it is its jumping up the amparge alot atleast 50 amps being pump through that 15 amp fuse

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91siguy &raquo;</TD></TR><TR><TD CLASS="quote">yea cause po8s grow on trees.. naw just kidding we're waiting to rull out the ecu last because it has to be something else i think the dizzy might be bad cause whatever it is its jumping up the amparge alot atleast 50 amps being pump through that 15 amp fuse</TD></TR></TABLE>

Where is this ECU fuse located??