i had to replace my TPS and bought an "updated gregorys book"? and to me it still seems to be wrong about adjusting the TPS. can some kind person please tell me the correct proceedure in adjusting the TPS. i have a 2002 tj exec manual conversion, no TCL or cruise.

Thanks in advanced guys

When Gregory's update their manuals it's to add bits, not correct errors.

Anyhow - one pair of contacts is a switch, should be closed when throttle is closed and open as soon as the throttle is pushed. Tells the ECU to activate the ISC control, I assume.

Another pair of contacts are a variable resistor, resistance should increase smoothly as the throttle is opened smoothly. Affects shift smoothness, I believe.

Experiment with your multimeter to work out which contacts do what, and ignore the info in the manual, I think they have the contacts reversed.

Have a look at the factory workshop manual to see if it makes more sense. (Section 13 A)
Pin 1 is the ground for both, pin 2 is the switch, pin 3 is the variable resistor. On the cruise/TCL model, the pin numbers are reversed - maybe that is why Mr Gregory has it wrong? lol

i had to replace my TPS and bought an "updated gregorys book"? and to me it still seems to be wrong about adjusting the TPS. can some kind person please tell me the correct proceedure in adjusting the TPS. i have a 2002 tj exec manual conversion, no TCL or cruise.

Thanks in advanced guys

The following procedure was posted recently in another thread.

Below is the procedure to set your throttle position sensor for a TH/TJ (without traction control).

1. Disconnect the connector of the throttle position sensor.

2. Connect an ohmmeter between terminal 2 (second from left with plug notch up) and 1 (left most) by using jumper wires.

3. Insert a feeler gauge with a thickness of 1.4 mm between the levers shown in the illustration to a depth of no more than 3 mm. NOTE: Inserting the feeler gauge more than 3mm will result in incorrect adjustment.

http://i59.tinypic.com/208cp5f.jpg

4. Loosen the throttle position sensor mounting bolt; then turn the throttle position sensor body fully counter clockwise.

5. In this condition, make sure that the closed throttle position switch is ON. (There is continuity between terminals 1 and 2.)

6. Slowly turn the throttle position sensor clockwise until the point at which the idle switch is turned OFF (continuity between terminals 1 and 2 changes to non-continuity) is found. Tighten the throttle position sensor installation bolt at that position.

Those details are straight from the workshop manual, I can vouch they are correct - unless Mitsu has the pin number back to front too. lol

If you get funny readings or can't set it no matter what you do, the TPS needs swapping out. (I'm assuming the new TPS you put on there is from the wreckers, not a Mitsu dealer)

I adjusted the TPS on my TS by the book (same procedure) and still got clunky downshifts when coming to a stop, so I experimented by moving the adjustment in small steps until all was smooth. It's an option if everything else fails.

now see, i tried it that way with the first 2 terminals on the TPS (new by the way) with a 0 ohm readout. but when i try with the last 2 terminals then i get ohm readings. so that's my first problem, my second problem is, do i turn the tps till just non-continuity, or until its just continuity? i know this is quoted out of the online manual, my Haynes also says a different way, and my Gregory's says a 3rd way lol.

Also instead of opening a new thread, i thought i would ask here, ive done a manual conversion on my TJ a while ago, but i was wondering if there would be any benefits in using the manual ECU, or should i just stay with my auto ECU. im just not sure if fuel mapping is different in a manual ECU, or even idle is different.

thankyou for the replies guys

now see, i tried it that way with the first 2 terminals on the TPS (new by the way) with a 0 ohm readout. but when i try with the last 2 terminals then i get ohm readings. so that's my first problem, my second problem is, do i turn the tps till just non-continuity, or until its just continuity? i know this is quoted out of the online manual, my Haynes also says a different way, and my Gregory's says a 3rd way lol.



I was wondering the same thing, but I assume that, once you identify the correct pins, then fully clockwise will be one state (open or close), and fully anti-clockwise will be the opposite state. You then just need to find the switch point. I assume the nominal 1.4mm throttle opening takes care of any slight variation on whether you are just open or just close (?).

Slightly related question - does the harness clip onto the TPS or does it just slip onto the TPS. Mine just slides on without any retaining clip, which makes we wonder whether my woes are a loose connection. And do the brown and black connectors of the harness come apart?

Inserting the feeler gauge lifts the throttle just a bit open. This is point at which the contact points need to just open, so when the feeler gauge is removed the contacts are closed (ie. contacts remain closed for the first 1.4mm of throttle rotation, measured at the levers, after which they open). Make sure you don't skip step 5, rotating the TPS fully anticlockwise first.

Slightly related question - does the harness clip onto the TPS or does it just slip onto the TPS. Mine just slides on without any retaining clip, which makes we wonder whether my woes are a loose connection. And do the brown and black connectors of the harness come apart?
There's a wire clip that is supposed to be inserted after connecting, from the throttle body side (awkwardly). It is $#^&@ easy to lose when sliding it out, you'll definitely need to grab one from a wrecker/you-pull-it. The different coloured parts don't separate if I remember correctly