adiga

i have jeep xj 1990 limited 4.0L with sport package
i changed tps and idle air and still jerking ... i don't know what type of TRANSMISSION i have and what sensor should i buy because sport package ? any help ??!!

Turbo X_J

yes, check for codes.

salad

All 4.0L engines with automatic transmissions shipped with the Aisin-Warner AW4.

Can you elaborate on this jerking? Is English your first language?

steelybill

Your friendly local Oreilly auto parts store will likely help you with the correct part. Just tell' em what Jeep you have....and that it's an auto trans AW4...

Don't ask at Advance auto, they just have mufflers.....

Radi

^^

Before you go buying parts.
Trans Speed Sensor isn't the first (or second, or third, or 5th) thing I'd suspect if the engine is jerking.

cruiser54

Did you ADJUST the new TPS?

How long since new plugs, wires, cap and rotor?

Ever looked at my Tips aimed specifically for your year?

They're a link in my signature.

adiga

yes the tps has been adjusted and spark plug and wires and cap and rotor all these new .... the only thing i never change it is the speed sensor any help ????is it from the speed sensor ?? i really need to know what is the problem ???

cruiser54

What method did you use to adjust the tPS?

Have you looked at my Tips?
You should do numbers 1,3,4, and 5 right away.

Radi

What, exactly is the Jeep doing? Jerking when? Stepping on the gas? Coasting? When shifting gears?

adiga

like this ... check it

http://autorepair.about.com/library/a/1i/bl232i.htm

cruiser54

That is a horrible way to test the TPS. It only takes into account the "trans" side of the TPS.


RENIX TPS ADJUSTMENT

Before attempting to adjust your TPS, there are two things that need to be done.

1) 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.

2) With the Key OFF, and using the positive (red) lead of your ohmmeter, set on the lowest scale, 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 parallels the valve cover and also over near the MAP sensor on the firewall. If you see more than 1 ohm of resistance, or fluctuation in your ohms reading, 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.

TPS ADJUSTMENT FOR ENGINE ISSUES

Both RENIX manual and automatic transmission equipped XJs and MJs have a flat three-wire connector to the TPS which provides data input to the ECU. The three wires in the connector are clearly embossed with the letters A, B, and C. Wire "A" is positive. Wire "B" is ground. DO NOT UNPLUG THE CONNECTORS !! 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. Loosen both T-20 Torx screws attaching the TPS to the throttle body and rotate the TPS until you
have achieved your desired output voltage. Tighten the screws carefully while watching to see that your output voltage remains where it is supposed to be. If you can't achieve the correct output voltage, replace the TPS and start over.

Sometimes, after adjusting your TPS the way outlined above, you may experience a high idle upon starting. If that happens, shut the engine off and reconnect your probes to B and C. Start the engine and while watching your meter, turn the TPS clockwise until the idle drops to normal and then rotate it back counterclockwise to your desired output voltage.

TPS ADJUSTMENT FOR AUTOMATIC TRANSMISSION ISSUES

RENIX automatic transmission equipped XJs and MJs 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 outlined above—FOR ALL 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. THIS SQUARE FOUR WIRE CONNECTOR IS USED FOR TRANSMISSION/SHIFTING RELATED ISSUES ONLY. First off, DO NOT UNPLUG THE CONNECTORS !! Key ON, measure voltage between "A" positive and "D" ground by back-probing the connector. 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.

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. The square 4 wire connector is just not used.
Revised 12-15-2013

adiga

when shifting gear from 3 to 4
every time i drive it she do it i feel like she put the gear in wrong time .... and take engine power and i must step on the gas to let her change the gear and after 2 sec. she back the same

adiga

i will try this tomorrow i hope to do that correct and find the problem ... can you make a video how to do that please ?

cruiser54

Uh, no.

odgreen

I'm I the only one to say that the Speedo is driven by a cable?


What you are trying to find is the output speed sensor.
But if it was bad you would have issues in every gear