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Old 12-16-2009, 07:23 PM
DOUBLE A DOUBLE A is offline
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Default 05' M7 problems
A friends sled.
EFI
He runs a boondocker box with twin pipes/porting

He's lost spark on 2 ecu box's.

He's on the 3rd box now and spark seems to be ok so far except when we
went riding the other day..shut it down for 15 minutes..wouldnt start again.
It's happened before. Its fuel related cause we pulled the plugs and it had spark so we poured some fuel in the cylinders and it fired right up.

When he had this problem before he would richen the bottom end with the boondocker and it fired up..kinda like choking it..so to speak..

It also doesn't seem to hold a good tune. Constantly messing with that boondocker box..

Ideas on the spark loss in the ecu?

Ideas on the starting issue?

I'm still a carb guy, no experience with the efi and boondocker thing.

Happy Trails!
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Old 12-16-2009, 07:39 PM
LucasMX358 LucasMX358 is offline
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Not a big FAn of twins! buddy bought an M7 with jaws twins and a BoonDocker box! junk, went back to single and no box and much improved!
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Old 12-16-2009, 07:53 PM
DOUBLE A DOUBLE A is offline
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Agreed...But it does run well when tuned and all is working. Just having some issues..Personally I don't trust the Boonbox's. This is also his 3rd boonbox.

Anyone else experience these problems?
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Old 12-16-2009, 08:20 PM
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does it have a fuel regulator on it: check the smart valves in the tank?
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Old 12-16-2009, 08:33 PM
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Has he checked a the wiring on the BD box? Could be a bad ground or injector wires crossed. I know that on certain models the injector wires are reversed from one another.
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Old 12-16-2009, 08:58 PM
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ecu...check for wiring under fuel tank pinched...fuel issue...check your reed valvepetals/stops...throttle body boots for fatigue
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Old 12-17-2009, 09:24 AM
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Thanks guys. I'll have him check these things and let you know.
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Old 12-17-2009, 09:55 AM
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Quote:
Originally Posted by 76FoMoCo View Post
does it have a fuel regulator on it: check the smart valves in the tank?
When you say "smart valves" are you refering to the three seperate fuel pick ups that it has? Or what exactly is the smart valves?

Thanks.
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Old 12-17-2009, 10:03 AM
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Can you post a pic of what it looks like under the hood?

Is the ECU moved to the side like it's supposed to be with twins (at least SLPs)? Heat tape etc?
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Old 12-17-2009, 10:20 AM
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Looks ok to me as far as heat goes. Speedwerx pipes.
Will check into that for sure.
Thanks for the input guys. Keep it coming
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