I have had a gremlin in my bike build since firing it up at the end of winter, and I am pulling what's left of my hair out. It will start & idle all day, yet when I apply throttle, it surges from 2500 rpm to 3000, then back again, over and over and over. When I started the bike up, I had the Guhl ECU flash, a PCV hooked up, a MPS kill box, and a MPS air shifter hooked up. The bike would rev in neutral, but blubbered and stumbled when I hit the shift button (it did shift).
I have disconnected EVERYTHING so I could just run the bike off the ECU & determine if the PCV or kill box was faulty. No good, the surging is still there, and the bike will not take any throttle. Oil pressure is great; holds 30-35 psi at idle, jumps to 60 psi at 3K rpm. Check engine light is on and stays on. Code showing 32 which is sub-throttle sensor. I have noted that this sensor does not rotate when throttle is applied. Would that cause this issue?
Things I have touched/changed:
[list]
Brock's/GUHL ECU Flash
New spark plugs 21 April (did this with the old plugs too)
Removed secondary butterfly plates and screws
Removed PAIR valve and plugged airbox hole
Installed PAIR block-off plates
By-passed and removed the charcoal canister behind the RH side fairing (tried with it hooked back up, NG)
APE cam chain tensioner
Billet oil pump cover
Removed and inspected fuel pump assembly - no debris there or in tank
Checked for kinked/blocked fuel line, tank vents, etc. - even tried running with cap open (NG)
VOODOO Sidewinder exhaust
Alien Motion LIPo battery (tried with old battery too, thinking it might be low voltage - NG)
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If anyone has any ideas why this is happening I am all ears. Never had any problems like this with any of my bikes in the past!
* Last updated by: redzx14racer on 4/23/2019 @ 4:43 AM *