Ok on my 2002 F4I i fired it up 2 days ago flawlessly, Went to do it today, and got it to go. It stayed on for about 1 minute being very rough. Shot some flames out the exhaust and then died. Now I can't get it to ignite and am unsure what to do. It's not the BAS, kill switch, I took everything off and dumped fuel into the throttle bodies. Nothing. It tries to start and you hear a deep engine noise every little bit, but never goes all the way. Battery has been charged and good to go and I'm running out of ideas. Please any help would be great.

 

And it is not the ECU, just barely swapped out a clean one. Checked all fuses as well.

 

Pump priming? Injectors pulsing?

Spark?

 

Fuel pump is priming, not sure how to check for injectors pulsing. And this may be dumb, but how do you usually check for spark?

 

To check for spark you can use an in line spark tester or simply remove the spark plug, Ground the electrode and crank the bike with the wire on the plug. You'll see it spark.

To check injector pulse you'll need a noid light which can be bought fairly cheap or made (google it).

Not to ask the obvious but are you sure it's got gas in it?

 

Haha yes learned that lesson from the last time. I'll check that stuff out. Question, if you dump fuel in the cylinders directly then shouldn't it fire up?

 

Assuming you didn't pour too much. I use brakleen because it's more of a fume than a liquid

 

Hmmm ok, I'll go check the plugs injectors, and re check the battery.

 

updates?

 

Pretty sure its the spark, it was barely shootin out spark when it was being cranked. Gonna order em in and swap em out tomorrow.