Just toying with the idea ..... I wonder if it would be feasable to run a full replacement ECU commanding the injectors & spark while leaving the stock ECU in place to run the rest of the car.

....... wonder how many codes this would generate lol ..... I already have about 11 codes on permanantly but my peice of foam CEL mod keeps that at bay :)

Link Extreme G4 ECU $1,980.00 each

For that kind of cash you'd run a Haltech Platnum Pro. Fooz have you considering approaching Haltech and see if you can get an R&D discount? You will be without your car for longer, but would be paving the way for other 380 owners.

Was just a thought, I think which ever way you went it would be CEL city but you could probably get it to work as long as the stock ecu didnt think the readings were to out of whack & start making life difficult. I checked mine the other day before I took it to the dealer to have my airbag light reset & I had 12 codes up but drives fine.

Yes this is possible.. Thats how i run my car.. Stock ECU is still there to run the everyday thinks in the car. I have the Haltech running the engine side of the Business. It then puts the Check Engine light on Permanent so we wired it up as a shift light. Since the Turbo build Check Engine light has been hooked up to the Haltech as thats what Engineering required.

in your 380 ?

My Is a TJ.. There will be no difference with 380. You will be able to run both ECU still.

Might be slightly more complicated with the 380 CANBUS etc ..... once I get all my current projects sorted I might talk to my tuner about this.

I cant see why it would be an issue..

Its probably something along the lines of how CANBUS works. From my understanding it takes tasks usually done by a traditional ECU and splits it up into smaller microcontrollers that AREN'T all linked up to one big daddy ECU.

So if one component... like the engine and all the sensors the engine uses and all the outputs the engine's management system where to disappear all the micro controllers that relied on those signals go into 'WTF mode'. SO all subsystems like: the ones in the transmission, antilock braking/ABS, cruise control, electric power steering EBD etc that needed information from the EMS module also lock up.

Aftermarket ECU's are there to customize fuel maps but cant put out the signals in the exact same way the factory ECU does. Without a way to replicate the signals the other components need to work leaves you with a engine that'll run amazingly but the rest of the car wont know whats happening.