So here is the scenario....My car is an 03 eclipse automatic, turbo'ed with evo 8 equipment and running dual ecu's (stock eclipse for tranny and evo 8 for the engine.) Today I received my turbo timer in the mail and proceeded to hook everything up. I made sure I disconnected the battery blah blah, the usual stuff. It was a used timer so I decided to just cut and solder the 3 wires into my ignition harness. I checked the wiring diagrams to make sure I cut into and hooked up the right wires and all. I tested it out and the car fired up and I set the timer and it shut the car down, Perfect I did it right....wrong apparently . Well after, I finally got around to putting my spark plug anti-fouler in for my rear o2 so I could get the check engine light to go off for my missing cat. After I go to start the car and nothing...it just cranks. I didn't hear the fuel pump so first thought was to check for fuel, but then I noticed my CEL was not illuminating when I turned the ignition on. (got my wish for no CEL...) I tried then connecting to evoscan and nothing...not connecting to the ecu. I ripped the timer out and tried again...nothing.

So its safe to say the ECU is fried am I correct? The one thing I do not understand is how this could have happened... Could it have been the turbo timer that did it or somehow my wiring of the ignition harness? I'm confused and completely screwed now ...I gotta find an evo ecu quick now i guess...Thanks for any help.

 

did u check fuses?

 

i'd check the ignition harness before jumping to conclusions, I don't think it could be the turbo timer, too many people use them and they don't fail. most likely just the way you wired it.

 

Yes I did, all fuses are good. I checked and I have power at my ignition switch and my ignition fuse is good, so I'm starting to think that is not the case. I've read that you can fry the ecu by grounding out the o2 sensor. While I was working on the exhaust I had the key on and listening to the radio not thinking anything of it and I removed the o2 sensor. When putting it back in I noticed that part of one of the wires was exposed so I was going to cover that up, but before i noticed that I definitely bumped the frame multiple times with the sensor trying to get it to fit in with the spacer. Does this sound like it could be the culprit and the ecu is fried because of that?

 

Actually, after looking over a few wiring diagrams I realized I missed a couple fuses, one of them being the one that caused all of this. Replaced it and good as new. Thanks for the help

 

Glad to hear, I would of prob S**T a brick if that happened to me lol

 

I definitely was lol I would much much rather pay a quarter for a fuse then 1-200 for another ecu!

 

Glad u found it. Now you gotta put that TT back in lol

 

TT is back in and running great!