Billythebiker
Turbocharged
Went out on it again and did the same journey with more or less the same results, little bit more erratic this time with the idle going back to normal when I put the bike on the side stand... :cry:
High idle...
- Thread starter Billythebiker
- Start date
Tatonka
.040 Over
same issue occassionally....recall tune.....turn it off and it goes away..go figure....sometimes I really miss a carb.
Short version:
On my bike the dealer replaced an o-ring in the throttle position sensor or TPS. It appears to have fixed the problem.
Long version:
I had this problem and went through a lot of hoops with the dealer trying to get it fixed. I should note that the dealer in Batesburg SC is GREAT. We spent most of the summer chasing this thing trying different fixes. So far it hasn't reoccurred since we decided to replace that o-ring.
The dealer tried replacing the stepper motor, re-setting the idle etc. and nothing worked. The problem always reappeared. Drove me crazy to the point I am not entirely rational about this issue.
The idea here is that the TPS o-ring deteriorates and prevents the throttle plate from closing all the way. Little bits of rubber get caught someplace and cause the throttle to remain slightly open when computer thinks it closed 100% The computer tries to adjust to the new condition and the bike now idles at 3K. Tests done at the dealer showed one throttle open slightly when it shouldn't be. So they would readjust things and the bike worked great for a while.
The head ache is that if you reset the idle the o-ring may not be causing problems at that time and all appears/test perfectly normal. You ride off thinking you are OK and then it happens all over again.
Bottom line: 1. It can be fixed, well it appears fixed. 2. It could be more than one thing causing it, stepper motor, throttle position sensor, o-ring in the TPS. 3. Try replacing the stepper motor, the TPS, or the o-ring in the TPS and see what happens.
Remember various repairs will appear to fix it then suddenly it goes high on you again. Try not to loose your mind over this.
On my bike the dealer replaced an o-ring in the throttle position sensor or TPS. It appears to have fixed the problem.
Long version:
I had this problem and went through a lot of hoops with the dealer trying to get it fixed. I should note that the dealer in Batesburg SC is GREAT. We spent most of the summer chasing this thing trying different fixes. So far it hasn't reoccurred since we decided to replace that o-ring.
The dealer tried replacing the stepper motor, re-setting the idle etc. and nothing worked. The problem always reappeared. Drove me crazy to the point I am not entirely rational about this issue.
The idea here is that the TPS o-ring deteriorates and prevents the throttle plate from closing all the way. Little bits of rubber get caught someplace and cause the throttle to remain slightly open when computer thinks it closed 100% The computer tries to adjust to the new condition and the bike now idles at 3K. Tests done at the dealer showed one throttle open slightly when it shouldn't be. So they would readjust things and the bike worked great for a while.
The head ache is that if you reset the idle the o-ring may not be causing problems at that time and all appears/test perfectly normal. You ride off thinking you are OK and then it happens all over again.
Bottom line: 1. It can be fixed, well it appears fixed. 2. It could be more than one thing causing it, stepper motor, throttle position sensor, o-ring in the TPS. 3. Try replacing the stepper motor, the TPS, or the o-ring in the TPS and see what happens.
Remember various repairs will appear to fix it then suddenly it goes high on you again. Try not to loose your mind over this.
slicktero
.020 Over
- Joined
- Oct 9, 2007
- Messages
- 28
For 4 months I had nothing but trouble with the way my 2005 Rocket ran. Tried everything that the tech department in Ga told me to do (I work for the dealer from whom I purchased the bike) Absolutely nothing helped. Bike would accelerate by itself, cut out a cylinder, and then cut it back in, etc. The way it ran was absolutely deadly. When I finally had it, we went over all the tests one last time. Every test we did three times. When testing the TPS, of the three times taking open and closed voltage readings, one of the readings was off by .02volts!!! Well, it seems that is all the TPS needs to be off to be no good. New TPS now in for 5,000 miles and bike keeps running like a champ. While looking for the problem, we synchronized the throttle bodies with mercury sticks. What a difference in how smooth the bike runs when synchronized this way. Don't relie on the computer to synch the throttle bodies properly!!!
