M8 Turbo no spark

[Holomis International]

Hey guys

Went out riding yesterday, played around all day then on the trail ride back to the truck, my 08 M8 turbo died. I tried to re-start it and nothing. The machine has ran flawlessly all season, I was running at about 11.5lbs of boost on straight AV gas. Anyways I did what I could on the trail could not get it to start, so I hooked it up to my fiance's Dragon and being the gentleman I am put her on the Cat and drug everything to the truck. Got in my shop today and again verified that there is no spark to the plugs. This is an 08 M8 with OVS turbo and Purelogic box. What typically cause's this, where should I start. I figure I would ask before spending hours chasing something.

Thanks in advance

Jeff
www.full-lotus.com
info@full-lotus.com

 

[jensen]

ECU

Do you have another m8 around you can borrow the ecu from? Had one do this earlier this year and it was the ecu. Swapped it out and it fired right up.

 

[CISC0]

Had same thing, was my stator. Could b a 100 things. Switch at throttle. Etc

 

[Jeff K]

There is really good info in this thread:

http://www.snowestonline.com/forum/showthread.php?t=206107

 

[Holomis International]

Thanks guys I am going to start going through it and see what I can come up with. Thanks Jeff K for the link.

Jeff
www.full-lotus.com
info@full-lotus.com

 

[Holomis International]

Ok started into the cat tonight and after only about 15mins of looking I found that the ground wire to the Pure logic box had broken at it's connector, I re-connected it with high hopes but nothing. Does this mean the Pure logic box is pooched?

Thanks

Jeff
www.full-lotus.com
info@full-lotus.com

 

[Holomis International]

whats the easiest way to bypass the purelogic box to see if that is indeed the issue?

Thanks

Jeff
www.full-lotus.com
info@full-lotus.com

 

[Holomis International]

Hey guys

Did the tests that Jeff K laid out in the above mentioned link. When I got to the Lighting Coil resistance it was supposed to be between .08 -.12 and I got a reading of .3 could this be the problem?

Thanks

Jeff

 

[sledstew]

testing

I would try to test the charge coil side of your stator, if the resistances are way off thats your problem, Ive replaced quite a few of them. I dont have the manual in front of me but maybe someone on here remembers the wire colors and what the resistance should be to test it out.

OK Found what you need ,copied it from Jeff K. This should eliminate your stator. Let me know if you need a stator.

Charge coil (1)
Disconnect the triple-wire plug from the main wiring
harness to the magneto.

2. Set the selector in the OHMS position.

3. Connect the red meter lead to the black/red wire in
the plug; then connect the black meter lead to the
green/red wire in the plug.
4. Charge coil (1) resistance must be between 7.20-
10.8 ohms.

CHARGE COIL (2)
1. Disconnect the triple-wire plug from the ECU to
the magneto.
2. Set the selector in the OHMS position.
3. Connect the red meter lead to the brown/white
wire in the plug; then connect the black meter lead
to the green/red wire in the plug.
4. Charge coil (2) resistance must be between 7.20-
10.8 ohms.

LIGHTING COIL
1. Disconnect the main wiring harness from the
engine.
2. Set the selector in the OHMS position.
3. Connect the two meter leads to each of the yellow
leads in the connector from the engine.
4. Lighting coil resistance must be between 0.08-
0.12 ohm.

 

[Holomis International]

Hello SledStew

Thanks for your reply, I got 10.8 on both charging coil tests and still .3 on the lighting coil. Thinking it maybe the ECU I have a buddy that we are going to go plug my ECU into his sled this weekend and see if that's the issue.

Thanks

Jeff

 

[dubbs]

So I take it the ECU was the problem hey?...

So the red and black wire from the pure logic box I guess are power for your secondary injectors... So good thing you found that problem!!

I'm pretty sure that the box itself gets its power from your primary injectors...

Let me know if you find another ECM around... I need one too.