hey,

so im having a battle with my car
this is whats happeneing




i drove it around after i just cleaned up the batter terminals in the back and redid some wiring on the coils, everything was great.
then i parked it.. went back out to go out and my ecu wouldnt turn on. i noticed my relays were clicking alot, i fucked up and i put a jumper between the relay slots.. and now it doesnt click. i noticed every time my relays clicked my commander would come on. i was able to stabalize it for a short time to start the car, i thought battery voltage was low so i thought the alternator would help.. it ran for a bit then i turned it off. i turned it back to the on position to see if the ecu was ok now and the relays were clicking .. and the ecu would start upp and shut off. i swapped relays with a known good one and that relay clicked as well. i even went as far as to open the pfc to looked for burnt out solder connections.. nothing. as of now the relays wont click at all.
im stumped.

 

Do you have a stock ECU to try? I suggest double checking your wiring before trying a new ecu though. You can blow up electrical parts without seeing any visual damage. Can you try the commander on someone elses car?

 

i was able to get it back to turning on and off, i also noticed the tach bounces and the heat light for the cat goes on and off when the commander goes on and off. i dont have a stock ecu to try ive replaced all fuses that tested bad ive cleaned the main ecu ground the batter ground in the back and the terminal and ive cleaned the main fuse box ground.. i noticed the air pump relay is clicking alot now. im really getting frustrated. all relays check out as well.

 

tested the ecu in another friends fd and the ecu is fine.. what else could it be?

 

did you change any ignition wires ?

I dont mean the spark plug wires , I mean the ones that come from the ignition key



If not I'd suggest you download the FSM and go at the wiring diagrams

 

ive added the hks turbo time harness. checked for power at the ignition and it was 12.8 volts

 

Did you check the wires running thru the fender? Your car is low with big tires. You might of rubbed thru some?

 

just pulled the fenders off and checked the harnesses. minor rubbing but no exposed wires.

 

alright, :P so.. what i want to do is check the power to the ecu. i need to figure out what connector powers the ecu and follow that wire. to speed this up does anyone know what wire or wires powers the ecu?

 

That's good. Ill be home friday night so we can fix our cars haha sunday or monday if you haven't gotten it.

 

The FSM shows the entire ECU pinout....

 

yea i realize that, its the blue with a red stripe that powers the ecu. but i said **** it and im remaking the ecu harness. its due for replacement anyway.

 

i took the harness out of the car (the one that resides in the fenders) and checked it over with all the tape off. i noticed on the wiring diagram that the egi main wire (black with a white stripe) had some teal corrosion. cleaned it up and everything is running great again!. just a reminder.. if you have a lowered car with big wheels. check your harness and move it.

FIXED!

 

Thanks for posting up your solution/fix. It will help someone in the future I'm sure.

 

noo problem

speaking of which theres another thread about egi main fuse blowing :P i will refer him to this page :P