TPS voltage issues

[Kyleinreallife]

So I’m about to head to Oreileys to pick up my 2nd replacement tps in an unreasonably short amount of time.

 

What makes them go bad? I noticed I was having fuel/shift issues so I went to check my tps (after already having replaced it once).

 

The connectors itself was on its way out so I unplugged the connectors to test the harness side and got proper input voltage (4.99v).

 

I plugged the connectors together and backprobed the tps side input and was getting only ~1.11v, after checking the tps side output I got ~0.18v—so it was still near proper adjustment at 17/83% but the voltage was way low. I figured bad connector(had been playing in the mud) so I cut it out and wired everything up with spade connectors to check again.

 

Here was my test. With all connectors plugged in except the input voltage: I put my negative voltmeter lead on the harness side ground and the positive lead on the harness side input and got a reading of 4.99v. As soon as I touched the tps side input to the harness side, my input voltage dropped to 1.11v.

 

I unplugged the input connectors and with them separated test each side.

 

Harness side: 4.99v

Tps side: .76v

Plugged together: 1.11v

 

What is happening?

 

 

87 XJ Wagoneer Ltd I-6 NP242 AW4 HPD30/D44

[Jeep Driver]

I have an Oreally on the XJ, I've gone through about 6 of them, they are junk but they keep giving me another. 

 

If you get one wet.......toast. 

[Minuit]

9 minutes ago, Kyleinreallife said:

 

 

What makes them go bad? 

 

 

 

They're garbage, lowest-bidder, slapped together junk. They aren't even worth the box they come in. I've had them bad right out of the box before.

[Kyleinreallife]

I have an Oreally on the XJ, I've gone through about 6 of them, they are junk but they keep giving me another. 
 
If you get one wet.......toast. 

I think you might be dead on, recent river crossing.


87 XJ Wagoneer Ltd I-6 NP242 AW4 HPD30/D44

[Kyleinreallife]

They're garbage, lowest-bidder, slapped together junk. They aren't even worth the box they come in. I've had them bad right out of the box before.

Are there better options? Are they worth it?


87 XJ Wagoneer Ltd I-6 NP242 AW4 HPD30/D44

[Minuit]

1 minute ago, Kyleinreallife said:

Are there better options? Are they worth it?


87 XJ Wagoneer Ltd I-6 NP242 AW4 HPD30/D44

It seems the only TPS that will make it out of the box in working order (or if you get lucky, last more than 2 years or so) is Mopar.

[Kyleinreallife]

Can a TPS be a source of poor gas mileage?


87 XJ Wagoneer Ltd I-6 NP242 AW4 HPD30/D44

[dvitha]

yes a bad TPS or not adjusting right can make bad mpg.