FC3AZ

Just wondering if a TPS thats out of adjustment can cause any problems, or performance decreases. I am gonna check mine tomorrow, and see where she stands.

Josepi

For me, I had hesitation under acceleration (theres my al sharpton impersonation), and popping from the exhaust in decel. Mild bucking...

The Ace

Well, when the TPS start to go the way of the Dodo, then all sorts of things start to go wrong...

First of all, you have the obvious idle/smoothness/bucking issues, which are due to the fact that the ECU is not getting the proper signal from the TPS, so its "tries" to compensate, and thus all these effects are produced....

Second, you may find out that your mileage starts to go downhill. A bad TPS will cause the engine to go up and down the rpm range without any reason, so the fuel consumption will be higher (and for no reason at all)...

Third, due to the fact that the TPS is -obviously- no longer able to reach and hold its minimum/maximum values, not only will you not be able to hold a decent idle, but you will not observe WOT as you should. Putting the pedal to the metal will not necessarily translate to WOT reading output from the TPS, so a badly formed A/F mixture will result. Guess what then ? Bad mileage, bad power output....

I can attest for the first two issues (and so can a dozen more other members of this forum), and a friend of mine can attest for the third: a brand new TPS made his TII a different car altogether after 5K rpms...

Rxmfn7

iTrader: (4)

Yea, Josepi is right, it can cause hesitation under acceleration (how bad depending on how outta whack the TPS is), and backfiring under deceleration. I dont think there is any actual *power* loss from it, but it can make you car run like **** in general. In other words if its not set right, youd definately notice.