Throttle position sensor not giving a reading even with a new sensor????

[dylansword]

So I've been having problems with my tps, and I thought it was a bad tps, I got a new one, and I'm still not getting a reading on my MAFT Pro. With the tps plugged in, I get a reading of 0.00 at all positions, and when I Unplug it, it goes to 0.12. Anyone have any suggestions ? Thanks


My car is an 87 turbo with MAFT PRO in speed density mode.

 

[jetjock]

How about not use the Maft Pro and use the TSRM instead?

 

[dylansword]

Because I have done that. The tps it's self is good.

 

[CajunKenny]

Go back through the Maft's settings and make sure that they are correct.

Have you done any firmware upgrades to the pro recently?

 

[dylansword]

I will do that. And no, but it is 5.0 if I remember correct.

 

[jetjock]

Guess I misunderstood. So the old TPS was verified bad using the book?

 

[dylansword]

I'm not sure about the old one , it was one from autozone or somewhere like that. So I got a toyota one, and it tested good. I also checked the vta wire, from the tps connector to the maft pro and it was at .8 ohms.

 

[jetjock]

Ok. I was just trying to figure out if you have any clue as to what you're doing.

 

[CajunKenny]

^That's a golden nugget comment right there! :biglaugh:

 

[jetjock]

I personally thought post 6 was better but yeah, ambiguity is a bitch. Lets not jump to conclusions though :icon_razz

 

[dylansword]

So any other input? Or just some be about who knows how to turn a wrench or not?

 

[jetjock]

Have you measured the VTA voltage being fed to the Maft?

 

[CajunKenny]

Assuming that your TPS is good and set properly, verify the Maft's connections. If you're familiar with a DVM, you can check the voltage at the ECU to rule out a failure in the Translator. Mine reads .48v pedal up and 3.48 pedal down.

Really, there are too many variables to continue guessing...

 

[dylansword]

I have not yet, what should it be at? Roughly?

 

[jetjock]

It should be around what Kenny said. Does this car have TEMS? If so turn on the key (no need to start the engine) and stab the pedal. If the system goes to firm the TPS is very likely working.

 

[dylansword]

It kind of has tems. The wiring and everything it there, bu not the actuators. You mean turn the key on and immediately floor the petal?

Other reasons I know something is wrong with the tps is, it runs the same when it is unplugged and plugged in, irratic idle, runs rich, and hesitates.

 

[jetjock]

Lmao. Such "minor" details can be helpful. Any codes? There should be. Yeah, just push the pedal down quickly halfway or more. As long as the TEMS computer is there the lack of actutors doesn't matter. Or just measure VTA...

 

[dylansword]

The snarky comments are completely unnecessary.

Yes it has codes, one of which if 41 i believe, for tps wiring.

 

[hvyman]

What are the others?

 

[jetjock]

The snarky comments are completely necessary. You come here looking for help, free help given out of the goodness of our hearts mind you, while withholding information that would be crucial to helping you. Worse, you *know* the information being withheld is related to your problem. You are slower than continental drift. On my list you go...