5.0 turbo wasted spark with EDIS coilpacks but no EDIS module - misfire?

[rob@vems.co.uk]

What sort of voltages are you seeing when the engine is running?

[JohnP]

As far as battery voltage. It was cycling from 12.5 to 13.2. The alternator worked itself to dust when the mark8 fan started to draw too many amps.

I have since replaced the alternator now 13.8-14.2 and just replaced the fan motor today as well. I hope to drive the car again in the next couple of days.

John P

[Kenny Watson]

My last project was a 2.8L inline 6 using an EDIS-6 coil and made 540whp on pump at 22psi of boost with 0.035 plug gap, no problem. I think the edis-6 is good for around 750whp. Two edis-4 modules (edis-8) should be good for around 1000whp.

The edis coils are excellent.

First problem:
Take that MSD and throw it in the garbage.

Drive the EDIS coil directly with VEMS. 3.8ms under full load is about right.

Second problem:
If you still have issues, throw aways the "screamin demon" coils and get OEMs ones.


Seriously, this will work.

[JohnP]

Well after being swamped with other things for the holidays, I ran the car...

I had a bad fan motor that lead to a shorted alternator. After replacing the alternator and fan motor, I set the dwell time to 4.0 constant.

The car pulls better and has not yet missed a beat. I am very pleased and hope this fixed issue helps some one someday..

 Thanks for all the input. John