2001 Kawasaki 1100 stx di surging on start

[Jaydens_32]

DOES ANYONE KNOW WHY THIS KEEPS HAPPENING? I have a 2001 kawasaki 1100 stx di that I am fixing up. On the first start it does this. It would run strong for 5-30 seconds and then hits the rev limiter. I did not give it any throttle and when I did it did the same thing. I'm not sure how long it sat before I bought it so that might be a factor, but I doubt that's what caused it. I tuned down the idle to where it doesn't take off, it may be too low though. It still hits the rev limit even when just applying the slightest throttle. PLEASE let me know if you know any ideas!

[K447]

Welcome.

Ficht direct fuel injected engines have the idle RPM controlled electronically via the EMM. How did you 'turn down the idle' ?

The Ficht EMM uses a throttle position sensor to know when the throttle lever is being squeezed.
If you unplug the TPS sensor does the engine now start and idle properly? It will not rev since the TPS is disconnected.

It is possible the TPS has failed internally and is sending incorrect throttle signals to the EMM.

The Kawasaki Ficht system is very similar to Ficht on Polaris.
See my signature links for more info on Ficht.

[Jaydens_32]

I just adjusted the throttle cable to where the idle screw made contact with the throttle body. it was idling way too high before, explaining the runway at idle. But it still will revvery high when given just the smallest amount of throttle. I unplugged the tps and it ran perfectly but didn't rev with throttle. I tried ajusting the tps and got it to output 0.2 volts at idle (in specified range with manual (0.2 +- 0.1 volts) but would only reach about 3.5 volts full throttle (lower than specified range (3.75~4.0 volts). I checked the input voltage and it read 4.9 volts (in specified range with manual (approx. 5.0 volts). when I adjusted the tps as close as I could to the full throttle specified range, it bogged and poured out white smoke and the idle voltage was way out of range (close to 0.5 volts) explaining why it wouldn't rev out of idle. I tried to find the sweet spot bot it was either too much or too little. do you think its bad?

[Jaydens_32]

Hey K447. No rush I know the website doesn't give you any notifications but I replied with the information about the sensor! It's not letting me message you for some reason.

[K447]

Hey K447. No rush I know the website doesn't give you any notifications but I replied with the information about the sensor!

It's not letting me message you for some reason.

I am not the only member who knows the Ficht system and may offer assistance. For Kawasaki Ficht I am less familiar than Polaris Ficht. Where they are similar I can be more helpful.

Private Messaging is not available to new members with few posts. It will activate eventually as your post count rises.

[Jaydens_32]

Ok that makes sense, I was just wondering if it sounds like a bad tps. No one else has responded to the forum so I was hoping you might have an idea.

[steve45]

Contact member HiPeRcO. He fixes the EMM units.

From his signature:

LAKESIDE TECH: Polaris/Kawasaki/TS FICHT EMM Repairs & MSX110/150 ECU UPGRADES
$25 off with code "GREENHULK"

http://lakesidetech.biz/

http://fb.me/lakesidetech1

http://fichtemmrepairs.com

Get your Kawasaki FICHT DI Diagnostic Software at the 4-Tec Performance Store

[HiPeRcO]

Thanks @Steve45

@Jaydens_32, the TPS is the first suspect. Have you tried reading the voltage when the engine revs up by itself? Have you tried running it with the TPS unplugged to see if it still does it? EDIT: I see that you stated that the engine didn't surge with the TPS unplugged. So this is further evidence suggesting that the TPS itself is faulty (and not the EMM).

[Jaydens_32]

Thanks @Steve45

@Jaydens_32, the TPS is the first suspect. Have you tried reading the voltage when the engine revs up by itself? Have you tried running it with the TPS unplugged to see if it still does it? EDIT: I see that you stated that the engine didn't surge with the TPS unplugged. So this is further evidence suggesting that the TPS itself is faulty (and not the EMM).

That's what its looking like, i'll order it soon and update the thread on what happens. Thanks for the help!