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Discussion Starter · #1 ·
Big project - got an F4i engine from a guy, complete with wiring and computer. Putting it in a kart. I jumpered the clutch switch, the kickstand switch, the bank angle sensor (I think it's right), and it will crank but no start. I don't have a schematic of the B.A. switch, but when I turn the key, the Engine Stop relay clicks and sends out power. The Fuel Pump relay won't click, but it's energized by the ECU. The MIL light doesn't come on, but the ECU has power getting to it. Seems like the ECU isn't awake. I don't have O2 sensor yet, I thought it would at least start without them. I have a manual, that shows the wiring diagram, but that diagram show one 4-wire O2 sensor, but my wiring harness has plugs for two 3-wire O2 sensors. I compared this to my 900RR, but it's not even close, due to the EFI. Any advice would be appreciated. Also, any place to send an ECU to get it tested? Any idea which ECU is correct for the 2002 600 F4i? Thanks for any help.
 

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First, welcome to TWF. I'm not sure what ECU is the right one for your bike but I am looking for it. Have you tried calling your local dealer to check with them and see if they can test it as well for you. And here is a place to call as well. Ask for Steve and he will be able to help you out or push you in the right place to get the info you need. 302-672-7223 he runs the shop at SpeedWerks.com. they are one of the sponsors here on TWF. :dthumb:
 

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Discussion Starter · #3 ·
Ecu...

I have two ECUs, #38770-MBW-A12, supposedly for a 2002 600 F4i. Of course, the sellers said they were both "good" !! Thanks all!!
 

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Bill Welter said:
I have two ECUs, #38770-MBW-A12, supposedly for a 2002 600 F4i. Of course, the sellers said they were both "good" !! Thanks all!!

:lol: :lol: :dupe: and you believed them?? :dupe: :lol: :lol: I have some hay I can sell you, It's only been through the horse once!
 

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V-Twin Moddin
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This is a tough one that I don't even want to touch w/o being in front of the thing and knowing more about what I would be dealing with...maybe Larry can steer you better on this one!
 

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Bill Welter said:
Larry who? Thanks.

Larryg...he is one of our wrench heads on here that can answer just about all the questions for a bike that the rest of us can't. :dthumb:
 

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V-Twin Moddin
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ATTN Need4speed750

Maybe you should move this to the Tech Help thread so Larry finds it a bit faster!!!! :willy:
 
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