So I have a 2010 with a KMS turbo setup. Got the kit used. Bike ran fine before the kit was installed. Upon Initial startup after install, engine wouldnt rev pas half throttle, and this is what it sounds like:
It almost sounds like its starving for air/ fuel or misfiring. But as far as I know, the KMS system is standalone and does not mess with the factory mapping or ignition timing, is this correct?
I took the bike out for a ride after install as I thought the issue might be related to elevation mapping, the symptoms persisted but got better with elevation, almost cleared at like 6500-7000' elevation.
I only got to take it out for 1 ride last season. This season after a full top and bottom rebuild, first ride, same problem but has gotten much worse, but I only got to like 4500 elevation. Also because of this issue, its not building any boost.
This is what I have tried for diagnostics:
Unplugging the TPS- same revving issue.
Checked the TPS resistance as per manual- closed throttle reading is good, WOT is reading 3.72. Manual specs is 4-6. I dont think this would be causing such dramatic rev issues.
Cleaned connection and plugged it back in- same issue.
(havent checked TPS supply voltage)
Revving it to the sputter point and squirting starting fluid- chokes out engine so its not fuel delivery, correct?
Unplugged turbo fuel injector- same issue, confirms its not starving for fuel.
Revving it to the sputter point and blowing compressed air (shop compressor) into the intake- same issue, so its not starving for air.
Unplugged factory fuel injector- wouldnt start at all.
unplugged MAF? sensor or whatever sensor it was that went into the airbox (airbox now gone with turbo)- same issue
Spinning the little adjuster screw on the KMS control box- made a slight difference of where in the RPM range it sputters- what is that adjuster screw for anyways?
I cant figure out what else it could be causing that issue.
I do speculate that maybe it may be because I still have these 2 loose end on the KMS harness: https://www.snowest.com/forum/threads/yz450f-kms-turbo-build.447917/page-3#post-4212491
its the connector shown in the pic of post #59 (its hard to see but theres 1 white plastic connector & 2 bullet style plugs) But as was said by some members in that thread, the 2 plugs dont go anywhere....?
Please help! I want to get some more rides in before the season is over....
It almost sounds like its starving for air/ fuel or misfiring. But as far as I know, the KMS system is standalone and does not mess with the factory mapping or ignition timing, is this correct?
I took the bike out for a ride after install as I thought the issue might be related to elevation mapping, the symptoms persisted but got better with elevation, almost cleared at like 6500-7000' elevation.
I only got to take it out for 1 ride last season. This season after a full top and bottom rebuild, first ride, same problem but has gotten much worse, but I only got to like 4500 elevation. Also because of this issue, its not building any boost.
This is what I have tried for diagnostics:
Unplugging the TPS- same revving issue.
Checked the TPS resistance as per manual- closed throttle reading is good, WOT is reading 3.72. Manual specs is 4-6. I dont think this would be causing such dramatic rev issues.
Cleaned connection and plugged it back in- same issue.
(havent checked TPS supply voltage)
Revving it to the sputter point and squirting starting fluid- chokes out engine so its not fuel delivery, correct?
Unplugged turbo fuel injector- same issue, confirms its not starving for fuel.
Revving it to the sputter point and blowing compressed air (shop compressor) into the intake- same issue, so its not starving for air.
Unplugged factory fuel injector- wouldnt start at all.
unplugged MAF? sensor or whatever sensor it was that went into the airbox (airbox now gone with turbo)- same issue
Spinning the little adjuster screw on the KMS control box- made a slight difference of where in the RPM range it sputters- what is that adjuster screw for anyways?
I cant figure out what else it could be causing that issue.
I do speculate that maybe it may be because I still have these 2 loose end on the KMS harness: https://www.snowest.com/forum/threads/yz450f-kms-turbo-build.447917/page-3#post-4212491
its the connector shown in the pic of post #59 (its hard to see but theres 1 white plastic connector & 2 bullet style plugs) But as was said by some members in that thread, the 2 plugs dont go anywhere....?
Please help! I want to get some more rides in before the season is over....
