Anyone on here running a stand-alone engine management system with a factory MKIV auto trans?
I'm not too sure about this but... I think when you use an auto with a standalone you use the standalone in conjunction with the stock ECU. Basically the stock ECU takes care of things like A/C and the shifting for the auto, and the Standalone takes care of running the engine. Good luck with your project.HyperRex said:...I picked up a theft recovery car. Supposedly, it was a running car minus the gauge cluster and leather interior. When I took delivery of the vehicle, I found that the ECM had also been cut out of the car. They cut the plugs as well, so it is not so simple as buying another ECU from the "For Sale" forum. I do, however, have an extra Autronic SMC engine management computer I can use to run the engine. I am perfectly willing to install the computer into the Supra to get it running, but I was warned by a guy at Toyota that the car's automatic transmission needs the stock ECM to run. I haven't verified this, so I don't know what sort of inputs or signals the car's auto transmission needs to run. I do have the factory manual on the way, but it won't be here for a few days. If it's possible to make things work, I'll keep the car. If not, I'll part it out and get it out of my driveway asap. I'd like to keep the car, however.
I'm not too sure about this but... I think when you use an auto with a standalone you use the standalone in conjunction with the stock ECU. Basically the stock ECU takes care of things like A/C and the shifting for the auto, and the Standalone takes care of running the engine. Good luck with your project.
\HyperRex said:Now the next order of business is to ask what is the best way to score the ECU plugs? I have already located a stock ECU. I imagine a new engine harness would be prohibitively expensive. How much do those HKS piggy back harnesses cost? The VPC or FCON harnesses? Wouldn't they have the ECU plugs? I can repair the harness if I have the plugs.
It will not work... you must modify the crank position sensor to three teeth from 12 and make sure you are using the correct Autronics "single tooth" software. (build 15 I think) You must also have a rectifier box on the stock sensor as the ecu wants a digital, not analog signal.HyperRex said:
As far as tapping into the stock sensor signal, it could work. I've had some problems with that before.