Actually adjusting the TPS is quite easy. There is a voltage reading coming from it. Between .45 and .55 at idle is where the voltage should be and at WOT it should read 4 volts. Some people advance it as it makes the fuel go a little more to the rich side. All you do to advance it is loosen the two screws that hold it and turn in.
I found this while searching for info on TPS . would it make sence that if you make your car a little lean that you could use the TPS to make up the difference. if it were true you would be able to get more air and fuel without doing damage to the motor or changing the air fuel ratio

Yes you can change it to add more fuel, but be careful not to go too high. If its already at .55 then you really shouldn't go much higher.

I have been considering this strongly. I am taking my car to the dyno for a 2 hour test session this saterday. I thought the FSM said a different spec at Idle and that you couldn't adjust the WOT part. I will go read that again. I did check mine at idle and it was in spec but I thought it had a pretty wide range. How is this all done??

Idle .45-.55v
WOT 4v

You simply hook a voltage meter to the wires and the loosen the two screws that hold the TPS and turn it. AS you turn watch the voltage. You can adjust the WOT above 4v also.

You can adjust the WOT above 4v also.
If this is true than why not advance it like they do with fords. If I knew this I would of bored my MAF out (instead of just opening the begining) and compensating with the TPS. I bet this is what ANDRES does.

Ding Ding Ding...this is the info I was trying to get a couple of weeks ago...

bet this is what ANDRES does.

I was trying to get info about the MAF and all I got was "don't do it you'll run lean and blow your motor". So I only opened the mouth instead of boring it out a little. then I saw that you can adjust your TPS to increase fuel. So I put 2 and 2 together and figured why not. Then I remember reading that Andeas bores all his MAF and I know people say He adjusts there TPS with a console SO i'm figuring that's what he does. Only Andeas could say for sure, but I'm sure it's his secret. I'm gonna raise mine a little tommorro and see what happens. I'll probably just do a few points higher and get a feel. nothing that would be to drastic till I'm sure.

Originally posted by Ericdd
TPS

BTW, did you get that memo? :D

BTW, did you get that memo?
What does that mean

Ericdd quote:
--------------------------------------------------------------------------------
BTW, did you get that memo?
--------------------------------------------------------------------------------


What does that mean


It is from the movie, "Office Space." Really funny movie, I suggest you go see it.

Ok Lundburg..back to work....

So, If the A/F reading from dynoing your car shows you running very rich...you could go the other way as well..

Im kinda cunfused as to why it is running rich. Just did a tune up new plugs/wires/cap n rotor/fuel filter/cleaned the KN/checked timing/adjusted idle/etc....now, the dyno was a cattle prod in the ol GReddy...and not a wide band inline, but it showed rich compared to others respectively. what is the basis for .45-.55..and going lower than .45 was sitting at .42 when I checked it...

So a lower number at idle will be a leaner mixture at WOT and a higher number at idle will be a richer mixture at WOT. 4v is the factory spec at WOT but a slight adjustment might make a difference.

So what else will lean out an overly rich SR...

I need to take it to have it tested again, after adjusting the TPS a little lower on the voltage...

Why if I have I/H/E adn 91 cam, and bringing more air in, am I running rich..? what causes and effects..anyone.?

On my tps, it seems that when you loosen the top and bottom screws, you can slide/adjust the upper portion quite a bit, and you can *slightly* move the lower portion. Is this normal? Is it the upper portion that only counts?

Anyways, I adjusted the tps alittle, because I had some part-thottle surging. I richened it up, and the surging went away, the only bad thing is that it runs pig rich at WOT! :(

-Bryan

what was it set at...? and what voltage did you take it to..?

I bumped mine up to about .6 today, I tried .65 but then my idle sky rocketed to 1500 and I couldn't bring it down, so I lowered it to .6 and lowered my idle screw a little and released the throttle cable and it was back down to around 800. I went for a ride at .65 and I felt a small difference. I'll let you know how .6 feels tommorro.

I drove tonight and I feel more power after 4000 rpm. It feels stronger all the way up to redline. when I set it I noticed that the WOT was over 4, It was around 4.5v.

I´ve set it on .58v and i gained what i´ve lost by setting the
timming at 19*; under 3500rpm i felt more response.

On higher revs in didn´t felt any changes.
I got some 4.14v. on WOT.
Got to Dyno it.

How much of the MAF is being bored out exactly to compensate for this increase of power?

I spent some time talking to Clark at JWT about the TPS. He said to turn the key to 'on' position. Next set idle to .45 - .50 volts (this specific range). Next check what voltage is reading at WOT. He said it should be 3.8 volts to 4.1 volts. If it's more then 4.1 at WOT your TPS needs to be replaced. He said that if your idle is set correct, and WOT reads at 4.5 volts or higher, the ecu does a bunch of wierd things, Clark said the computer goes into some kind of diagnostic mode. Next pretend like your adjusting your timing. Have car warmed up, rev the motor 3-4 times at 4000 rpms, then turn motor off. Unplug the TPS plug, start car. The TPS is similiar to our ecus kind of, in that it needs to be reset and 'learn' when we make changes to the TPS . Clark said to run the car for about 20-30 seconds with the TPS unplugged, then plug in the TPS plug while the car is running. The car should drop from 1400+ rpms back down to 850 rpms or so.

I recently built an 11:1 compression motor, and have been fighting surging problems for 2 months now :(. I tried retarding timing, changing plugs and plug gaps, using octane boost, etc. I adjusted the TPS according to Clark's instruction, and reset the TPS memory afterward. BINGO! My car finally runs really nice now! :). Although I am still going to replace my TPS because I set idle at .47 volts, and it reads 4.28 volts at WOT. So theorically it will run alittle bit better when everything is in spec.

Sorry for the long post, but just use caution when adjusting the TPS!

-Bryan