TPS reset procedure

17810 Views 11 Replies 7 Participants Last post by Smokier104, May 15, 2022

blairaudio

Discussion Starter · Jul 25, 2018

I always wondered why my bike was such a pain to low speed/low throttle position cruise. Seemed to be on or off. So I read about the TPS reset procedure and tried it. Well it seemed to make it a little worse, I mean now when I hit a bump the bike would donkey Fxxx you. So back I go to read how to adjust the TPS reset procedure properly. Well what I found is before attempting the procedure you need to make sure your Butterflies are in the full close position. Because I have a 2007 VJ i have a idle screw. That idle screw doesn't allow butterflies to close for the reason of idle. Lol
Anyways i backed out the idle screw dam near all the way and proceeded in the TPS reset procedure. After that I started the bike readjust idle back to 950 ish and to my amazement I own a new bike. No more ON off and slow speed issues. Anyways hope this helps others with that particular issue.

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vision_nut

· #2 · Jul 25, 2018

Hold throttle wide open for slow 5 count
Let throttle SNAP shut/closed
Cycle kill switch (off then on)
Start bike, and enjoy the ride

Key on, switch on, engine off
Slow 5 count rotate throttle from closed to wide open
Hold throttle wide open for slow 5 count
Let throttle SNAP shut/closed
Cycle kill switch (off then on)
Start bike, and enjoy the ride
See if this make any difference. The throttle position sensor is just a rheostat like a light dimmer switch that sends varying degrees of voltage to your ECM. yes it can effect your milage & performance-is it what's causing your backfire issue? Maybe but in my experience backfires on Vics are caused by intake leaks-Check the rubber boot at the throttle body for leaks-you can spray a shot of brake cleaner/starter fluid at the area and if the idle changes you know you have a leak-also check all you exhaust connections and make sure they're tight.

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blairaudio

Discussion Starter · #3 · Jul 26, 2018

vision_nut said:
Hold throttle wide open for slow 5 count
Let throttle SNAP shut/closed
Cycle kill switch (off then on)
Start bike, and enjoy the ride

Key on, switch on, engine off
Slow 5 count rotate throttle from closed to wide open
Hold throttle wide open for slow 5 count
Let throttle SNAP shut/closed
Cycle kill switch (off then on)
Start bike, and enjoy the ride
See if this make any difference. The throttle position sensor is just a rheostat like a light dimmer switch that sends varying degrees of voltage to your ECM. yes it can effect your milage & performance-is it what's causing your backfire issue? Maybe but in my experience backfires on Vics are caused by intake leaks-Check the rubber boot at the throttle body for leaks-you can spray a shot of brake cleaner/starter fluid at the area and if the idle changes you know you have a leak-also check all you exhaust connections and make sure they're tight.

I fixed my issue with making sure butterflies are at full closed before procedure. My bike is not backfiring it was at low throttle on and off. Just talked with another person about TPS and he said the same thing. You have to set it starting point at full close on butterflies or it can cause a lean condition which gives you the symptoms I was having. You see I set my idle at just under 1000 but when backing off my idle screw i can drop my rpm to 500 or more. That tells me my butterflies were not in the closed position prior to TPs reset.

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blairaudio

Discussion Starter · #4 · Jul 26, 2018

Sorry I did have a pop once and a while under different driving conditions. But now I don't have pops.

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tree1979

· #5 · Jul 26, 2018

This video may be helpful to you. It has been a good resource for me.

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blairaudio

Discussion Starter · #6 · Jul 26, 2018

Great video and I always do these basic maintenance procedures. So when doing the TPS reset procedure does anyone make sure that the throttle body butterflies are in full closed? Or do you just do it with idle set at 1000 rpm? For fun I did the reset again but with idle set at 1000 and my bike is hard to ride at 10 mph or less. It shuts off fuel before throttle is full closed I guess. It also has a loud pop. So then i lowered rpm all the way down to i would assume butterflies are completely closed and did the TPS reset again. Now the bike rides amazing at 10 mph and does not pop. It seems to me just like I was told by a old wide race car gentlemen that throttle bodies need to be full closed before doing this procedure. I have read so many threads and no one ever says this.

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Ohmslaw43

· #7 · Jun 27, 2020

So, same issue with my 2001 V92C. Cleaned the throttle bodies and tried the TPS reset. I still have a little rough idle, check engine light and pops on deceleration. Only change to mine is it has HD slipons which I wouldn’t think would make a difference. Any thoughts other than the HD on a Vic?

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Vic fan

· #8 · Mar 20, 2021

blairaudio said:
I always wondered why my bike was such a pain to low speed/low throttle position cruise. Seemed to be on or off.]

Hey Blairaudio, appreciate the hot tip. Bought an 07 Vegas Jackpot last fall. Have been tinkering on it over the winter ready for riding weather to kick in. I have the same issue as you with the on/off throttle at low speeds. I will try your fix and report back how it goes.

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blairaudio

Discussion Starter · #9 · Mar 20, 2021

I had issue with this and never really got it perfect. I decided to buy Lloyds fuel processor and now it's good. Could never really remove the lean bucking just with TPS reset, well humid days were better then dry colder days.

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Vic fan

· #10 · Mar 20, 2021

Gotcha, I have not ridden on a hot humid day with it yet. Only cooler dry days, so could end up duplicating your better fix. I also noticed I have rubber tubes on my throttle body that are plugged with golf tees. Any idea what that is about? I believe they are on the vent fittings.

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Bikesofbrads

· #11 · May 14, 2022

Anyone looking for iac or tps reset procedures please make sure your doing the correct resets for your correct models and years

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Smokier104

· #12 · May 15, 2022

Greetings @Bikesofbrads ,

Good to know. Didn't realize the procedure was different between models and years. Although with a little thought it makes sense. Now digging to ensure Momma's '12 XR and my '15 XC are the same procedure.

Ride safe,
Smokier

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