tps

[01turbosentra]

ok the idle jumps around it revs to 2k then fals to 1k over an over again and with the scan tool i checked out the tps position and at wot it only sees 70% open and at idle it it 0% it there a way to reset the tps or were can i find the part i tried our parts department but there clueless on findin it

[bps71]

try the search button ... its out there .. i found it when i needed it.....

also i found a tps at advance auto ...

[nametakennow]

Somewhere on this page or Sentra Gen there's a thread about resetting the TPS. Look for it.

[01turbosentra]

k thanx man also ill get pic of the motor soon i dont have a camara on hand but ill get sum pics soon

[RED_DET]

There is a sticky on how to check TPS ***voltages***, which you need to to do see if the TPS needs to be adjusted.

[01turbosentra]

i saw one of your write ups on sr20det swap and i have the tps with the 6 wire setup two connectors which you said its for the automatic trans any was i could not set it up the tps will not read correctly no mater wat voltage and at W O T it only read at 70-75% open so im thinkin it got wet sum how or shorted out. What tps could i buy thats would connect to the original connector and be a direct fit?

[01turbosentra]

ok i took out the voltmeter and tried to adjust the tps and the voltage stays at 4.00 volts nomatter were its postioned so is there any possible substitute trottle postion sensor out there

[RED_DET]

Did you position the prongs on the voltmeter on the proper wires on the tps? You should read 4v when the throttle is completely open and .45-.55v when closed. If that is the correct reading you are getting, then you can simply buy a TPS from nissan for any manual sr20 vehicle.

[01turbosentra]

ok thanxyeah its definitly the corret reading also i have the 6 wire tps on it right now if i were to get the manual tps i can jus leave the other connector hanging

[01turbosentra]

ok i installed the new tps and now i still coannot get it adjusted it now reads 4.70- 4.87 volts

[RED_DET]

I don't think you are checking the reading from the proper points on the TPS.

TPS Voltage Adjustment

Imagine that this picture is what the back of your TPS wiring harness looks like as it's plugged into the TPS:

-----| A |--------| B | |--------| C |-----

What you need to do is get a DVM and hook the positive lead through the back of the harness into "B" and hook the negative lead through the back of the harness into "A". It's easiest if you straighten a couple of paper clips (I used my wife's sewing needles...she nearly killed me) and shove them into the openings and hook onto 'em with alligator clips, but *DON'T* let them touch. Turn the ignition on (don't start the car) and check the voltage between "A" (-) and "B" (+). It should be between 0.45 and 0.55V. If it's not, you'll need to loosen (but not remove) the two screws or bolts that hold the TPS to the throttle body. Rotate the TPS until you get the proper voltage and tighten the screws, making sure it doesn't go out of adjustment when you tighten it down. As a final check, open the throttle all of the way. You should read around 4V. If so, great! If not, uh...my condolences.

Ford guys adjust the TPS to "fool" the computer into thinking the throttle is opened farther than it actually is. It supposedly works, but it never made much sense to me. It seems that the ECU would think that WOT is achieved at a certain voltage (like 4V on ours) and going farther than that doesn't do any good. It would also seem that if the TPS is "turned up" too high, the ECU would never see the correct voltage for closed throttle (like ~0.5V on ours) and the idle would be all screwy. But they claim it works and claim to have back-to-back 1/4 mi runs to back it up. It sounds like a good question for Jim or Clark at JWT.

You are checking voltages with key on engine off, right?

[01turbosentra]

yes with engine off ill retest later and post the results