| daz | | Zeus |  |  | | Reg. Date | : | 12/05/2009 | | Posts | : | 7,686 | | Location | : | United States |
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| | Posted : 01 May 2022 - 22:05 Post title : stepper motor and TPS adjustment | | | Ok, after all the crap i went thru figuring this out with all the unclear write ups i found on it and the "written by monkeys" idiocy in the triumph manual, i finally figured it all out for myself. Heres the CLEAR and simple explanation that will will NOT find anywhere ! (where the F was i when i needed this? oh yeah, sweating and cursing in the garage) I will outline the steps for tuneecu in simple form for other dumbshits like myself and Dave out there.  (Can't wait till Dave see that one:)) Also, i will put asterisks **** next to some things that require further explanation, and after the final step see those below for details.
1-pull the headlight fuse *** because this may take time, then hook up tuneecu. I only have the old desktop edition so if recent editions of tuneecu for android are different then you may have to improvise. Pull the tank off (need to do that to get to the TSP adjudter) then reconnect the instrument panel, as the ignition can't be turned on W/O it.
2-turn on the ignition and go to the tests tab and hover the mouse over "adjust ISCV" and double click it fast. (too slow and it doesn't start) Also not it's a right click, not the usual left. As the bike goes into test mode you will hear a buzzing noise till it's done. At this time *check and adjust if needed the stepper motor clearance for the .5mm gap between the cam and roller.*** Note that if the gap IS at .5mm and you don't need to adjust it, then look at the bottom gauge on the tests page while ISCV is running and note the voltage. If it's within the .58 to .62 volt range then you won't have to adjust TPS. If it's NOT within range, move to step 3.
3- once stepper is checked and in spec or checked and adjusted if needed and TPS spec is not showing itself within the proper range, you'll have to **adjust the TPS that is between the throttle bodies so that it reads .71v under the "throttle" heading in the left pane on the diagnostics tab.*** (asterisk below will explain why .71v)
***The fuse box is under the right side cover and it's a bit tricky to remove the top. On the front of the box you will see the cover is fixed onto the box with a tab that must be pulled on to lift it. The tricky part is there are 2 more on the back side which as you will see are not easy to access. I'll let you figure the rest of it, as i don't even know how i finally got that bitch off ! I will say however the headlight fuse is the second one from the left on the row closest to you. I think it's a 15. The labels inside the fuse cover aren't very intuitive so figured i'd mention that.
***Heres what had me running in circles. When you check the stepper clearance you will see the stepper has a nut that you need to adjust IF the .5mm clearance is out of spec. The tricky part is that when you check it, getting the feeler gauge in there just right will be tricky and if you don't it can feel like theres no clearance no matter how much you adjust the stepper nut. On the right side under throttle body you will see the stepper towards the left as in the pic at the bottom of this post. B is the stepper adjustment nut and A shows where you use a .5mm feeler gauge to set the gap. Note the round part or as they call it, the "roller" on the throttle linkage and how it is resting against the stepper "cam". If you look closely u can see that the stepper cam is a V shaped notch that the roller sits against. When you click on the ISCV adjustment in tuneecu the stepper motor will pull the cam back away from the roller and at that point you measure for the .5mm, but note that until you run the ISCV test there will be no gap and thats NOT the time you want to check for the .5mm clearance. When you are running the test and checking for the clearance put the feeler as far toward the center of the throttle bodies as it will go so it's not on the part where the roller is riveted to the metal. That metal part will cause issues getting the measurement otherwise. The other thing that will screw it up is putting the feeler in too far. You only want to put it in till it is at the roller and not past that or it will bind and push the throttle linkage forward making you think there no gap there. Kinda hard to explain this clearly so hope you get what i'm describing. Anyways, once you figure out how to get the feller in there right, turn on the ignition and run the ISCV test on the tests tab in tuneecu by double right clicking it and confirming in the pop up window. While it is running which will be obvious due to the buzzing noise, check the clearance. If it's good and the gauge at the bottom is showing somewhere between .58 and .62 volt you won't need to adjust the TPS. If not you will, then get ready for big fun ! (sarcasm)
*** The reason i say .71v and not within the .58 to .62v range is because the number there does NOT reflect the actual TPS. It will show the actual TSP value the bike is at on the bottom gauge of the tests tab when you are running the ISCV test. And it will show a much lower number. I found that if that number is correct at .6v, the throttle heading on the diagnostics page will show about .71v. So why not just set the TPS by the value shown on the bottom gauge when running the ISCV test? Because the TPS is is a HELLISH place between the throttle bodies and it will take you WAY longer to adjust it than the test goes on for. So rather then having to keep running that test 100 fucking times to keep the gauge active while u r attempting to adjust the TPS, just bring up the diagnostics tab when setting the TPS and that way you don't need to run the test. Just set the value to .71v under the throttle heading and then when you run ISCV you should see the proper voltage on that bottom gauge.
Now onto how to adjust TPS. Wish i'd taken photos but i forgot so this may be hard to describe. First thing to do is go out and buy a 8mm open end wrench thats long enough if u don't already have one. Most that come in sets are too short and the one i got is just barely long enough and is 5.5"long. I found ace hardware has a Ace brander one with ratcheting action on the closed end for $10 making it worth while rather then paying just for an extra bit of length. Remove the tank and then plug the instrument panel back in because u will need it to turn the ignition on. From above the throttle bodies you will be able to see the TPS bolt with a strong flashlight, but first you will need to get a few things out of the way to clearly see it and to be able to get the wrench on it. The main electric harness and about a 1/2" or 3/4" hose next to it will be troublesome if you don't get them out of the way. I pulled them towards me standing on the left side of the bike and used a couple tie wraps to hold then there. The other thing is theres a vacuum hose (not the MAP) that goes to a nipple on the right throttle body that is in the way. From the right side of the bike u can see it. Pull it off and move it out of the way. I will leave it to you to figure out where exactly that nut and the sensor are. But once you do loosen the bolt just enough to be able to move the TPS body. The bolt is in a oblong hole so the sensor can be moved left or right.
Once loose turn the ignition on and in tuneecu go to the diagnostics page and under the "throttle" heading you will see a voltage. I used a long screwdriver to lever the sensor left or right till i go it to .71v. Once you get that reading tighten the bolt. It may change while tightening it so if it does u will have to repeat the procedure. Once tightened and at .71v, go to tuneecu's tests tab and again run the ISCV test. As it's running check the bottom gauge to make sure it;'s within the .58 to .62 volt range. Time to zip it up and you can either do a adaption reset, IE 12 minute tune or just ride and let the bike adapt over time. Mine ran quite well after i finished but idle was a little hard to hold which i think will sort itself as the bike adapts.
I am burned out after writing this so i only did a quick check for mistakes but i will check it later, so be aware if something sounds wrong. Also, for those who understand this procedure better then me let me know if you see anything you feel is mistaken.
EDIT: i forgot to mention one thing. When you do the stepper adjustment, tuneecu will give you some instructions to follow after you check the clearance. You e=will see it at the bottom. I don't recall exactly ow that went but just follow what it says.
| 2010 Blue/White Thunderbird, "Brutus". 1700 kit, short tors, gutted cat, UNI filter, filter seal off, custom tune. Brutus in his native habitat: Link
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