• Don't miss out on all the fun! Register on our forums to post and have added features! Membership levels include a FREE membership tier.

04 1M EFI Starts and Runs But Craps Out On Hvy Throttle

My 900 will run and accelerate as long as I baby the throttle. As soon as I get on it she craps out. TSS is unplugged. Seems pto side plug fouls.
Goes crappy and when I turn it off and restart we are back to baby throttling.
Just replaced both water and air temperature sensors with brand new. Coil is also new and I can swap coil wires around and fouling stays left side.
Bogging has progressively gotten worse over the years from rare to now unrideable.
Some tell me TPS others are saying ECU. Suggestions?


New member
Lifetime Membership
Premium Member
Jan 15, 2019
you could try a quick compression test easy jumping off point eliminate base engine concerns
Premium Features