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TPS adjustment procedure (throttle mod.)

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#83 ·
in10sive said:
Finally done it :> Great mod!!!

At the end I took off the whole gas pedal assembly, made the job so much easier.
Click to expand...

I did too...so much easier looking at what you are adjusting Vs smashed up under the dash in full body contortion...LoL!!!
 
#84 ·
tmccorkel said:
Wow, I can't believe I forgot to include that. Yes, the engine should be off while adjusting. Has anyone tried it with the key in the "run" position with the engine off? That might prevent the service engine light issue.

You can always buy an Ultragauge to clear the SES light ;)
Click to expand...
I did the adjustment with the key in the RUN position. The engine was not running of course. It did end up giving me a pretty good scare.

After I was done, I started the car and the throttle didn't work at all! This was because the ECU sensed a zero voltage from the TPS when I disconnected the cable. It then considered the TPS to be faulty and stopped taking input form it.
The solution was simply to turn the ignition to the OFF position and then restart the car. I did get a CEL, so I reset the ECU by disconnecting the battery. Everything works good now.

You do NOT have to pay $80 to clear CELs. Just disconnect your battery, discharge any latent charge by trying to start the car with the battery disconnected, hook the battery back up, and reprogram your radio after you are done.
 
#86 · (Edited)
It has a catch on it -- you have to squeeze a trigger and it unlocks, then you wiggle it off. The clip/latch is on the passenger side of the harness connector -- feel for it, squeeze it and you will feel a click when it releases.
 
#87 · (Edited)
ForteSX2.4 said:
It has a catch on it -- you have to squeeze a trigger and it unlocks, then you wiggle it off. The clip/latch is on the passenger side of the harness connector -- feel for it, squeeze it and you will feel a click when it releases.
Click to expand...
Finally got it off. Had to take off the pedal assembly to do so, but still.....

And now another issue that I ran into when I was checking to see why I wasn't getting a voltage measurement: there appears to be a blue plastic that is covering all the back probing holes, which means I can't get a bare wire to connect to to test on the voltage :(


Edit: Well, finally solved the issue I was having with the addition of a sewing needle into the orange wire. Managed to get a reading off of it, and tweaked it to .95. I must say the response I get after it, and the transition into second gear is much smoother and nicer. Good takeoff, which I'm hoping will translate into better high end for freeway mergers, etc.
 
#89 ·
I just did mine and now have a CEL. Not happy about this. The car drives fine, so I will give the battery disconnect a try. I adjusted mine with the ignition on, not sure how else you could do it. Ended up with .91V and there is very little dead spot. I'm not sure it's really easier to drive, but I'll wait and see. I would prefer if the throttle was not so light and was not so aggressive. Our VW is much easier to drive because it has a more linear throttle and it's heavier.
 
#90 ·
Walpole5 said:
I just did mine and now have a CEL. Not happy about this. The car drives fine, so I will give the battery disconnect a try. I adjusted mine with the ignition on, not sure how else you could do it. Ended up with .91V and there is very little dead spot. I'm not sure it's really easier to drive, but I'll wait and see. I would prefer if the throttle was not so light and was not so aggressive. Our VW is much easier to drive because it has a more linear throttle and it's heavier.
Click to expand...


Don't worry buddy, i had the same CEL too, just disconnect the battery and you'll be fine. Mine is at .94 and i think its perfect
 
#91 ·
Walpole5 said:
I just did mine and now have a CEL. Not happy about this. The car drives fine, so I will give the battery disconnect a try. I adjusted mine with the ignition on, not sure how else you could do it. Ended up with .91V and there is very little dead spot. I'm not sure it's really easier to drive, but I'll wait and see. I would prefer if the throttle was not so light and was not so aggressive. Our VW is much easier to drive because it has a more linear throttle and it's heavier.
Click to expand...

Noodile's right...since you had the ignition on the ECU detected incorrect settings while you adjusted it. Best to adjust, turn on ignition to check, turn off ignition and readjust as necessary, then turn ignition on again to check...repeat until you get it right.

If you are near an Autozone you can take the car there too and have the codes read...and then they can do an erase to clear the codes.
 
#93 ·
I drove the car more extensively yesterday after the mod. All I can say is that it is different, but in my opinion, not really better. I still think the root of the problem is the pedal is too light and too aggressive at tip-in. A heavier, more linear throttle would transform this car. Somebody smarter than me get working on it!
 
#95 ·
sam_mas said:
Is there a trick to getting the connector off? I tried getting it off for almost 40 min today and had no luck. Tried to pry it off, that didnt work either :S

Any suggestions?
Click to expand...
The connector has one clip on it -- you squeeze it until it clicks and then you wiggle the connector loose. Don't try prying it off you'll just break the clip. Take the pedal assy out by unscrewing the four 10 MM nuts and you can turn it over to see the clip you have to squeeze.
 
#96 ·
Isn't it better to make a mark on the sensor before you move it so that if you have to return it to the original position there would be less of problem? That is, you won't have to guess where it was originally.
 
#97 ·
foska said:
Isn't it better to make a mark on the sensor before you move it so that if you have to return it to the original position there would be less of problem? That is, you won't have to guess where it was originally.
Click to expand...
Good call...or you can use the screw marks on the cover from when the original setting was done.
 
#98 · (Edited)
i just wanted to thank the original poster for the walk through, excellent guide! i'm a newbie to modding / accessorizing my autos so this was a great write up for sure!

i also took the time to make a video How-To based on this write up here, i'm editing right now, and as soon as it's finished and uploaded i'll post back here! again, i want to thank everyone for their posts and help. so with that said, i'm going to get back to editing and come back when she's done ;)

by the way the only Mods i've done so far are rims, this mod here and a blue LED Dome light.. (workin on it a little at a time)
next up is an exhaust, tint, and a wing in the back.

New Rims (only 16's i know, i know.. )
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Image

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#100 ·
Why is the link to "http://youtu.be/i8PV2_aoioQ"
My work firewall goes Crazy when we go places we aren't suppose to, so I inspect every link. Why not just post the youtube.com link?
 
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