303frost
Well-known member
the manual says to remove the throttle body to access the TPS. is this true? what do I need to watch out for/have ready if I do have to take it out?
TPS removal, do i need to take out the throttle body?
- Thread starter 303frost
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Chicknstripn
Well-known member
You shouldn't have to remove the throttle body. It's a little fiddly but all you have to do is unplug it and remove those to small bolts. Just remember to follow the proper steps when resetting the TPS after installing the new one.
303frost
Well-known member
Well the new tps didn't fix the stalling issue. Getting pretty pissed. Did the TPS reset, put fresh fuel in it, still dies at stop lights. Runs great otherwise. Bike is a 2009 xb12r with 44,250 miles on it. Spark plugs have some carbon build up, not much though. Running a bit rich, still getting 33mpg and that's from driving it pretty aggressively. I guess I might just have the shop look at it but they have no diagnostic equipment and I don't know if I trust their judgment all that well.
303frost
Well-known member
Also noticed that the cooling fan doesn't come on when the bike is running. I let it idle for a couple minutes after I did a quick run and it only comes on when the bike is off. Is that normal?
303frost
Well-known member
Also, when I bought the bike it had that voltage regulator problem where it would drain the battery every time I rode it, and I would have to leave my battery on the charger every time I wanted to take it out. Would the bike running low on battery often mess with any of the electricle compinents? The charging system works now, but I noticed the stalling at idle when warm problem just before and after the voltage regulator was fixed
lowkey
Well-known member
Are you hooking the bike up to ECMSpy to see what all is going on? What temp is the bike when you are shutting it down? I'm close to you here in Buena Park, same temps as you and mike bike doesn't run the fan until I shut it down (12STT). I could give you a hand if you want, I've got ECMSpy on my laptop. I just had my 02 go bad and replaced it, my bike would also die at idle once it was warmed up, does your bike do this from a cold start up? On my bike the fan was running on the highway and lacked the usual pull, in my case the 02 was making it run lean though. What is pointing you to the TPS sensor as the issue? 33mpg sounds like you are buring up quite a bit of fuel, I get 47-49 mpg on a good tune.
EDIT:
303frost, I'll PM you my number, you can text me if you want a hand. I'm free right now or tomorrow if you want.
Last edited:
Chicknstripn
Well-known member
+1 to what lowkey just said. I know my tune is less than ideal for my set up and I average 50mpg.
Simple i know but is your air filter really dirty?
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- Dec 3, 2014
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Checking the intake seals is pretty easy, and can cause some symptoms you described
303frost
Well-known member
Air filter looks good, isn't oily from the breather hoses. I'm going to do a breather reroute and new spark plugs thanks to lowkey's advice
lowkey
Well-known member
Alright guys, yesterday I was able to meet up with 303frost and have a quick look at his bike. As he described, when the bike is at full operating temps and at idle it will stumble and die. I wasn't able to take a look any deeper on it than glancing over the basics. The throttle has slack at full closed and doesn't actuate to full throttle smoothly so first thing were going to do is get down to the throttle body and lube and dial in the cables. I was able to hook it up to ECMSpy and check some of the values, the AFV was 99% so not bad there, the idle was right at 1,150 so again not bad there ether. The value for the TPS was high at 11.1% so we did a relearn procedure (first time with an 08 up bike for me) and the value came to 11% so I googled what it should read and found this "If you connect to Directlink, a fully closed throttle should indicate 3.7 to 4.2 degrees. If it doesn't, repeat the above steps.", would these same values apply to ECMSpy? I'm thinking with the slack in the cable the TPS relearn isn't seeing the correct full open full closed value to reset to here. One other thing is I was able to connect to the bike but only was able to read main page values and fetch the eeprom of his bike, I was NOT able to check for codes as I kept getting an error, does this sound typical? I'm going to try and find TunerPro for the next time we meet up and see how that works out.
Here is the list we are planning to do then reevaluate how the bike is doing:
1.) adjust throttle cables and lube them.
2.) redo the TPS reset at this point and with airbox off and AIT plugged to the bottom airbox plate visually inspect throttle body at idle and fluidity of the butterfly in relation to the throttle grip.
3.)reroute the breathers and inspect everything going on under the airbox.
4.)check intake seals for engine surge while we have the airbox off.
5.)change out the plugs for NGK DCPR9EIX's while were in there.
6.)check ecu harness connection and all grounds.
This was a two owner bike before him and recently bought from a used bike dealer. When he went to leave the bike also stumbled and hunted to stay idling and would die after being cold (45ish min) after he came over. (really leaning toward the idle/fueling values being off here)
I feel at least with the list I put together we should be at a good baseline on the bike to start troubleshooting deeper. Any suggestions are welcome.
Here is the list we are planning to do then reevaluate how the bike is doing:
1.) adjust throttle cables and lube them.
2.) redo the TPS reset at this point and with airbox off and AIT plugged to the bottom airbox plate visually inspect throttle body at idle and fluidity of the butterfly in relation to the throttle grip.
3.)reroute the breathers and inspect everything going on under the airbox.
4.)check intake seals for engine surge while we have the airbox off.
5.)change out the plugs for NGK DCPR9EIX's while were in there.
6.)check ecu harness connection and all grounds.
This was a two owner bike before him and recently bought from a used bike dealer. When he went to leave the bike also stumbled and hunted to stay idling and would die after being cold (45ish min) after he came over. (really leaning toward the idle/fueling values being off here)
I feel at least with the list I put together we should be at a good baseline on the bike to start troubleshooting deeper. Any suggestions are welcome.
Chicknstripn
Well-known member
I think #1 on the list will make a big difference. Without having the throttle cables properly adjusted I don't think you'll ever get a proper TPS reset. Especially considering the fact that all the input the ECU is receiving is from the twist grip. That and the plugs I believe will make a difference.
Have you considered replacing the O2 sensors? If the bike has been running for 45min and the stumbling is getting worse there could be an issue with the O2 sensors.
Knock out your list, then consider the O2 if you're still having issues after warm up.
Good luck.
Have you considered replacing the O2 sensors? If the bike has been running for 45min and the stumbling is getting worse there could be an issue with the O2 sensors.
Knock out your list, then consider the O2 if you're still having issues after warm up.
Good luck.
lowkey
Well-known member
Yeah, not sure on the condition of the 02 sensor, the bike has around 45k on it. Mine just went out and was running the bike lean but the thing to consider is his AFV is almost perfect so you would see a swing of rich or lean and the ecu adding or subtracting fuel in that case. We'll see what happens once I get the list done, I'm confident it will be sorted or become a little clearer what to look for after that.
Side note: I got a copy of TurnerProRt V5 up and running and tested on my bike. I got as far as fetching my eeprom but was kind of lost following this: http://xoptiinside.com/yahoo_site_admin/assets/docs/Using_Tunerpro_RT.34962044.pdf I made it to step #10 but then tunerpro dialog box was bouncing between yellow "DA: not connected" and blue "DA: connected" with errors to the left of that counting up... Hope it didn't **** up anything on my bike.
