How to adjust TPS?

[joeym4130]

Hey all, I was pointed to the fact of how bad my TPS is out of whack, and I definately need to adjust the thing. I just need help on how to get to it!! There is the top bolt/screw, easy to loosen. But there is the bottom one I am having a B***H of a time getting to, I dont know if there is a reccomended tool/method to getting at it, w/o removing other parts.. I'm hoping there is a way, but it looks bleak
If i cant get at the screw w/o taking off the rail and take the rail off, i have to depressurize the fuel system right? How do i depressurize that? Im going to use readings from the logger to adjust... any help would be just great. thanks guys.

 

[sound227]

You dont wanna remove the TB because you dont wanna break the gasket. I found my 90 to be easier to get at than my 91, but I was able to get to both by using a knuckled socket set up and a lot of patience. Just loosen it enough to make it movable, so loosen the top first. In the junkyards, I found it real easy to just remove the fuel rail to get at it, bu tthen you still gotta but it back. My buddy read the resistance because he has a degree in electronics, so I cannot help you there.

 

[joeym4130]

Hmm ok..maybe i'll go out and look for another socket to try, mine bent but i guess not enough...
well im not gonna use resistance, im just running my logger w/ key on and monitoring the readings, w/ the top screw loosened it worked, cause i could twise the TPS enough to get the % to change. anyways, off to find tools...thanks!, anyone else is also welcome to help

 

[AWDPetmitsu]

There are instructions on how to adjust your TPS on RRE's website. As for the bottom bolt, it's a pain to get to. I used a short, small, 8mm combo wrench with a lot of twisting and wiggling of my fingers and wrists through different openings to loosen and tighten. I didn't find any need to touch the fuel rail, but then again, I have slim fingers.