Hey all, anyone got any ideas why my rear rotor injectors aren't opening?

Personally, I think its the ECU.



I say this cuz I checked the wiring harness and it has continuity. All the way from the injector plugs to the ECU connectors. But I am absolutely sure the reason my POS S5 hybrid isn't running right is because the rear rotor isn't getting any damn gas!



I took it out on the turnpike the other night, just to drive it, then came home pulled all the plugs and lo and behold the rear leading and trailing plugs are as clean as a whistle, minus a little oil. Next test was to completely pull the rear plug wires to make sure they have spark. Yup, they sparked like mad. So, my conclusion is the ECU is crap. What a waste of $200.



Now here's my usual list of "I don't know what the hell is going on!" questions. Answer if you want, please.

Does anyone repair ECU's? What kind of damage can I cause to the engine running it on one rotor alone? Does this make any sense to anybody? Can I run the car with a NA ECU? Does anyone have a spare N370 ECU that actually works?



Thanks

Mike

N/A Ecu won't work.... i had a spare n370 from my car but i sold it two months ago....... i have a panspeed light sport tuned ecu that might be for sale soon https://www.nopistons.com/forums/pub...DIR#>/wink.png

we had a problem like that and it was primary injector not plugged in firmly. if u had a noid light u can plug it in harness and run eng for a min- if it lites up u know ecm is working. i`ve seen them on snap on tool truck. https://www.nopistons.com/forums/pub...R#>/mellow.png

What's it called? A "noid" light? Can I find one of those anywhere or just from Snap-on? Anybody know of another way to test to see if the ECU is telling the injectors to open?



I checked the ECU codes but they aren't telling me anything. I was wondering if I could just switch the turbo mother board to a known working circuit board. What I mean is, there are two main circuit boards inside the ECU, I'd pull the turbo circuit board w/ all the eeprom chips on it then take a known worknig NA ECU and pull the NA eeprom board, replacing it with the turbo eeprom board. The thought being that only the eeprom circuit board is specific to the model of car and that the other circuit board is generic or the same no matter what, NA or turbo. I know that is a big assumption, but I really don't want to have to buy another ECU.



Does this sound like a viable option? I've inspected the Turbo ECU and believe I located some burnt out components on one of the two boards, not the eeprom board. Anyhow thats just a thought.

i couldn't give you an answer.... never heard of that

Heh, desperate times call for desperate assumptions or something like that.

i think it goes desperate measures. if i get my other ecu. you can buy my panspeed LOL

Ack! There's that word "buy" again :( Do you offer a "layaway" plan https://www.nopistons.com/forums/pub...

Ack! There's that word "buy" again :( Do you offer a "layaway" plan https://www.nopistons.com/forums/pub...[/quote]

no sorry. use paypal and use a credit card LOL

ok. i could just be spouting nonsense here..... but are you sure your FCD is working correctly? doesn't the ECU cut fuel to the rear rotor in overboost situations? maybe the ECU thinks boost is too high?