Joe'sXJ

i still havent got my tps where i want it.... I set it to the closest i can get it, that is 4.25, but its suppose to be at 4.12 i believe... Its at 1000s rpm in drive and almost 2000 in park. I am about to take it into a shop and pay hella amount of money that i dont have! Please any tips on how not to strip the screws...(or is there a stainless steel screw i can replace it with???) and adjust it to the precise place?

My375hp302

sounds more like a bad iac or a vacuume leak. try disconnecting the tps and then start it. If you still have a crazy hogh idle your problem lies elsrwhere.

Joe'sXJ

is there an unside down way on the IAC? it looks really new

My375hp302

not sure if it goes in either way, but it shouldn't matter if it will fit both ways. Looks mean nothing, Ive had several go bad over the years and none of them looked bad. what did u fing when you disconnected the tps and started it?

Joe'sXJ

i have not done that yet, i want to know what noise i want to hear, and what i dont want btw i dont know what a hogh noise is?

Joe'sXJ

u know what... when i swapped out my throttle body, i put the old IAC from the orginal into the new one. I should of cleaned it off with a rag or with carburetor cleaner, ill try doing that tomorrow

cruiser54

What method are you using to set the TPS?

Joe'sXJ

Im using a voltohmer sms going off of ohm ressidtance

Gee oh Dee

Moved to OEM Tech.

Donnie_K

it isn't a noise... it's rpms... if they're still at 2000 in park with the tps unplugged, then the tps isn't your problem.

cruiser54

I don't understand your post but here's how to do it. Check it on the engine side.

RENIX TPS ADJUSTMENT
Before attempting to adjust your TPS be sure the throttle body has been recently cleaned.
It's especially important that the edges of the throttle butterfly are free of any carbon build-up.
IMPORTANT NOTE: Set your meter to measure Ohms. Using the positive (red) lead of your ohmmeter, probe the B terminal of the flat 3 wire connector
of the TPS . The letters are embossed on the connector itself.
Touch the black lead of your meter to the negative battery post. Wiggle the wiring harness where it runs parallel to the valve cover and also near the MAP sensor mounted on the firewall. If you have an 87 or 88 with the C101 connector mounted on the firewall above the brake booster, wiggle it, too.
If you see more than 1 ohm of resistance, and/or fluctuating resistance, some modifications to the sensor ground harness will be
necessary. The harness repair must be performed before proceeding.
I can provide an instruction sheet for that if needed.
MANUAL TRANSMISSION:
RENIX manual transmission equipped XJs have a three-wire TPS mounted on the throttle body.
This manual transmission vehicle TPS provides data input to the ECU. The manual transmission
TPS has three wires in the connector and they're clearly embossed with the letters A,B, and C.
Wire "A" is positive.
Wire "B" is ground.
Key ON, measure voltage from "A" positive to "B" ground by back-probing the connectors..
Note the voltage reading--this is your REFERENCE voltage.
Key ON, back-probe the connector at wires "B" and "C". Measure the voltage. This is your
OUTPUT voltage.
Your OUTPUT voltage needs to be seventeen percent of your REFERENCE voltage. For
example: 4.82 volts X .17=.82 volts. Adjust the TPS until you have achieved this percentage. If
you can't achieve the correct output voltage replace the TPS and start over.
AUTOMATIC TRANSMISSION:
RENIX automatic transmission equipped XJs have a TPS with two connectors. There is a flat three-
wire connector, same as the manual transmission vehicles have, and it is tested the same as the
manual transmission equipped vehicles--FOR ENGINE MANAGEMENT RELATED ISSUES.
However, the automatic TPS also has a square four-wire connector clearly embossed with the letters
A,B,C, and D. It only uses three wires and provides information to the Transmission Control Module.
Key ON, measure voltage between "A" positive and "D" ground. Note the voltage. This is your
REFERENCE voltage.
Back-probe the connector at wires "B" and "D". Measure the voltage. This is your OUTPUT
voltage. Your OUTPUT voltage needs to be eighty-three percent of your REFERENCE voltage.
For example 4.8 volts X .83=3.98 volts. Adjust the TPS until you have achieved this percentage.
If you can't, replace the TPS and start over.
So, if you have an automatic equipped XJ your TPS has two sides--one side feeds the ECU, and
the other side feeds the TCU. If you have TRANSMISSION issues check the four-wire
connector side of the TPS. If you have ENGINE issues check the three-wire connector side of
the TPS.
For those with a MANUAL TRANSMISSION--the TPS for the manual transmission XJs is
stupid expensive. You can substitute the automatic transmission TPS which is reasonably priced.
Revised 03-13-2012

Joe'sXJ

I found out my problem! I found out that i had a vacuum leak! I guess when i was under the hood i unpluged 2 vacuums and that made my jeep run super high. Im glad i found it out today, rather than sending it into the shop.

cruiser54

Glad to hear that, but you still need to set your TPS properly.

Joe'sXJ

no its where it should be at. I made sure to and tested it. Thanks for the helP!