kengsheldon

i have the same problem,i also get the low voltage at mass air,and egr,code 122,327,an327,so computer runs in falure mode,egr is blocked off,i could also use some info,i didnt know u could adjust the tps

94ford5liter

The voltage stays at .08 volts no matter where the throttle blade is. I know it isn't the sensor because I tried putting the stock one back on, and this is already my second new one because I exchanged the one I bought. It didn't throw the code with the stock sensor before, but now it does.

I checked the battery ground, and the main engine ground and they both look fine. I fixed a smaller ground that was broken at the battery, checked all the fuses, and cleaned up almost all the fuse connectors on the fuses in the engine bay. However, it still has the same problem :/. I really have no idea what the problem is. Anyone else have any more suggestions?

dawson1112

If the voltage doesn't change at any throttle position then the computer isn't seeing a return on its reference voltage . If you are checking the reference from the ecm using the wire from the ecm that supplies the tps ground in the plug and your seeing the 5 volt reference, then you have a bad tps. If you check the reference voltage using the engine ground you should see the 5 volts showing that you have reference to the tps, if then you check the ref, at the plug using the tps ground in the plug and you see .00volts then the ground from the ecm is broken someplace .

94ford5liter

MAJOR UPDATE: Man I feel like kind of an idiot lol. I've seen a couple posts where guys say there is nothing to installing a tps sensor on a 94-95 Mustang, but that is definitely NOT TRUE. I took the sensor off the throttle body and moved the tabs in the sensor with a screwdriver to see if it would climb up to five volts and there it was! So then I started thinking about the mechanics of the sensor. The tps has to be installed in a position where the throttle blade is going to move the tps tabs in a clockwise position. If you just bolt the tps on there.... it doesn't work! After I installed the tps the correct way, the code went away.

Unfortunately, I broke the new sensor in the process of testing it with a screwdriver lol, but how I see it I saved a diagnostic fee and probably some other BS a mechanic would charge me. I also now found out that I installed the one on my Cobra wrong and that means the tps hasn't been working on that for years. I guess because that is professionally tuned it doesn't make as big of a difference, but I bet it has a lot to do with why it just dies at idle sometimes!

Thanks for your input guys, and I feel very relieved to have it figured out.