Front cylinder not hitting it appears

[Nomad2day]

I have a 2007 Bulldog EFI and all of sudden it started missing and I thought I would throw it out here what is happening before I really tried to troubleshoot seeing how I am working from 3am to 3:30pm. Went to put gas in it when I got off and while it was idling it started sounding really off. Gas station was just about a 1/2 mile from the house so I took it anyway. Power way off and only sounded like it was hitting right when it got up around 4k rpm.
Filled it up and brought it home.
Pulled the front cylinder plug wire off and it had a weak spark when I put it to the plug. Put it on and when I pulled the rear jug plug bike would die instantly.
Took my girlfriend out in the truck and had a cold one to let the bike cool off. Got home and put another set of old plugs in. Fired the bike up and the same miss. Pulled the front plug no change, pull the rear plug wire bike dies instantly.
That is the story.
Bike is EFI and no map changes.
I have another crank position sensor but I would think if it died or acted up I would have no fire.
Tell me what you think and I appreciate to advice....
Coil? Crank position sensor? Plug wire?...or other.....
Thanks in advance..
Neil

 

[erldawg]

You could swap the plug wires as well as the wires on the coil for starters to see if any changes.

Your pretty sharp troubleshooter.. Does the Thunderheart EFI have the integrated ignition module?

 

[Corey]

I just had a collapsed rod and mine did the same. It was like the front cylinder was non existant. The same with the plugs and all.

 

[V]

Well like mentioned check the wire first, then coil ?

 

[lee]

I agree. One of my plug wire connectors corroded right through inside the rubber boot, the other one looked brand new. Easy thing first you might get lucky

 

[Nomad2day]

Got off my 12 hour shift from 3am to 3:30 pm and had a Crown Black and seven to wind down and then went out to check the bike out. Pulled the top engine mount out and coil cover off to check things out. I have had it off recently so I could replace the check valve on the rear head breathing to the air cleaner backplate. When I unplugged the coil one pin was bent up and not seated in the connector correctly. Front plug wire had pulled up from the coil as well even though I had a tie wrap on it. The spiral wrap both plug wires was burnt some from touching the diamond cut heads as well but everything ohm alright. Put everything back together seating the connector after bending the pin back and she ran like a raped ape...
All is good here...
Neil

 

[Brew]

Glad that it was a cheap fix...:2thumbs::2thumbs:

 

[erldawg]

Good to hear ....Back up and running :2thumbs: