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View Full Version : Anyone run the stock ECU and haltech simultaneously?



Angry Joe
02-09-2003, 09:02 PM
We have a Haltech E6S which we are using to fire the injectors on our '99 Yamaha R6 engine, but we want to use the stock Yamaha ECU to provide ignition.

I've been told it's possible to run the Haltech off the ECU's tach output signal to avoid having two timing sensors. I know the Haltech won't play nice with the Yamaha crank position sensor. Has anyone had success doing this?

Lehigh Formula SAE

www.lehigh.edu/~insae/formula (http://www.lehigh.edu/~insae/formula)

Angry Joe
02-09-2003, 09:02 PM
We have a Haltech E6S which we are using to fire the injectors on our '99 Yamaha R6 engine, but we want to use the stock Yamaha ECU to provide ignition.

I've been told it's possible to run the Haltech off the ECU's tach output signal to avoid having two timing sensors. I know the Haltech won't play nice with the Yamaha crank position sensor. Has anyone had success doing this?

Lehigh Formula SAE

www.lehigh.edu/~insae/formula (http://www.lehigh.edu/~insae/formula)

B Lewis @ PE Engine Management
02-10-2003, 09:01 AM
What is the problem with using the Yamaha sensor with the Haltech? If the Haltech will accept a 2-wire sensor you may be able to get it to work by adjusting the gap between the wheel and the sensor. If the system cuts out at low RPM decreasing the gap will eleviate the problem.

Brian Lewis
Performance Electronics, Ltd.
"Complete Engine Management Systems for $760"
www.pe-ltd.com (http://www.pe-ltd.com)

Angry Joe
02-10-2003, 09:17 AM
According the the Haltech manual the ECU is limited to 10,500 rpm when using a missing tooth trigger

Just spoke to Haltech and they said it should be no problem if the Tach output is a square wave, I'll have to see...

volvo2f2
02-11-2003, 07:30 AM
We tried the same thing with the Motec...the Motec and stock ignition box would not share the crank sensor. We decided to throw away the stock igniton box due to it's lack of programming and not working with the motec. Got a MSD CDI box that run directly off the ECU ignition trigger wires and goes right to the stock coils. Says it is good to up 15,000 rpm. Another advantage is your don't need the extra tooth on the crank sprocket (you can shave it off) and just use a multiple tooth arangement which is supposedly more reliable.

We are still having trouble with the cam sensor with the motec. Mind sharing how you got yours to work if you are using one?