TPS help

[wildstang90]

I pulled some codes from my car yesterday 1990 lx 5.0. I got a 53 TPS reads wide open throttle. So i checked the voltages and it reads 4 volts no matter if its at idol or wide open. So I went to order a new tps and I found there are 2 diff OE part numbers E8zf-Aa and E6af-Ca, Da. How can I find out witch one I need for my car there are no numbers on the old one at all.

Other codes I pulled were
O 53, 85, and 84
C 63, 66, 87, and 53.
I never ran the test on the car when It was runing figured I needed to clean these up first. Any help with these codes would be great.

 

[Maryland Stang]

The E8 sensor is for non California cars with A/T.

 

[pony50boy302]

just curious .. i would like to check mine .. how did you do it ? what type of meter do i need .. can you recomend one or post a link thanks

 

[wildstang90]

Setting the TPS: you'll need a good Digital Voltmeter (DVM) to do the job. Set the TPS voltage at .5- 1.1 range. Because of the variables involved with the tolerances of both computer and DVM, I would shoot for somewhere between .6 and 1.0 volts. Unless you have a Fluke or other high grade DVM, the second digit past the decimal point on cheap DVM’s is probably fantasy.

Since the computer zeros out the TPS voltage every time it powers up, playing with the settings isn't an effective aid to performance or driveablity. The main purpose of checking the TPS is to make sure it isn't way out of range and causing problems.

The Orange/White wire is the VREF 5 volts from the computer. You use the Dark Green/Lt green wire (TPS signal) and the Black/White wire (TPS ground) to set the TPS. Use a pair of safety pins to probe the TPS connector from the rear of the connector. You may find it a little difficult to make a good connection, but keep trying. Put the safety pins in the Dark Green/Lt green wire and Black/White wire. Make sure the ignition switch is in the Run position but the engine isn't running.

Here’s a TPS tip I got from NoGo50

When you installed the sensor make sure you place it on the peg right and then tighten it down properly. Loosen the back screw a tiny bit so the sensor can pivot and loosen the front screw enough so you can move it just a little in very small increments. I wouldn’t try to adjust it using marks.

(copied from MustangMax, Glendale AZ)

A.) Always adjust the TPS and Idle with the engine at operating temp. Dive it around for a bit if you can and get it nice and warm.

B.) When you probe the leads of the TPS, do not use an engine ground, put the ground probe into the lead of the TPS. You should be connecting both meter probes to the TPS and not one to the TPS and the other to ground.

C.) Always reset the computer whenever you adjust the TPS or clean/change any sensors. I just pull the battery lead for 10 minutes.

D.) The key is to adjust the TPS voltage and reset the computer whenever the idle screw is changed.


I got this from this link on stangnet.com

http://forums.stangnet.com/showthread.php?t=698148