TPS Adjustment Help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

wileymotorsports · 12-08-2011, 08:56 PM

Hello, I have a 1991 240sx with the s13 sr20det black top, yesterday I went to check my throttle position sensor voltage, because i read at idle the sensor should read .45V. I plugged the red end of my volt meter into the middle wire and the black end of the volt meter to the black wire on the sensor and the meter said .30v, I went to adjust the tps sensor and noticed that it was adjust as far down as possible and if i adjust it the other way my voltage reading goes down? Right now my car is idling at 1500rpm and I saw it should be around 895 rpms, and if I adjust the sensor the idle goes up? Another bit of info at WOT my voltage reading from the TPS only goes to 3v which in searching it should be 4v. So Im pretty confused at this time any help would be appreciated. Thank you, Kyle

sugarkouki · 12-09-2011, 03:36 PM

Any luck on this?

wileymotorsports · 12-09-2011, 03:48 PM

no luck yet. I tested it agian last night and I got the same reading. Then I tried putting a spacer in between the TPS and throttle lever until it read correct voltage, started up my car and it idled right around 900 rpms, but the engine seemed to be cutting out slightly, Maybe a bad TPS? The car runs great, but my idles high and tps is reading incorrect, idk any help??

KaminaSan · 12-09-2011, 03:56 PM

bad tps, or you are testing the wrong wires...

Try with the negative of the multimeter on a chassis ground. See what you get.

besTint · 12-09-2011, 04:01 PM

did you try to clock the tps sensor? you may have the wrong tps sensor or like ^ the guy saids, it might be defective. find someone around you that will let you borrow an extra one to test. id give you one to borrow if you were local.

wileymotorsports · 12-09-2011, 04:22 PM

Im thinking it might be a bad tps. I tried putting the negative end of the multimeter on a chassis ground and got the same results. I dont know anyone thatll let me borrow their sensor. Is there anyway of testing to make sure the sensor is faulty before dropping the $ on a new one? Can anyone recommened a good place to get a new one? Is this a SR20det specific sensor?

besTint · 12-09-2011, 04:31 PM

Genuine OEM Nissan TPS (Throttle Position Sensor) Sensor SR20DET S13
they usually have it in stock. if you decide to buy a used one, i have a couple for sale. $50 shipped

http://zilvia.net/f/sale-items/41651...0sx-parts.html

#32 with stock SR throttle body.

all are tested and in good working order.

wileymotorsports · 12-09-2011, 04:39 PM

Thanks for everyones help, im gonna mess with the sensor tonight to make 100% sure I am testing it properly. Ill probably end up ordering a new one. Is it ok to drive the car in the mean time?

12-08-2011, 08:56 PM	#1
wileymotorsports Join Date: Dec 2011 Location: Arizona Age: 36 Posts: 34 Trader Rating: (0) Feedback Score: 0 reviews	TPS Adjustment Help Hello, I have a 1991 240sx with the s13 sr20det black top, yesterday I went to check my throttle position sensor voltage, because i read at idle the sensor should read .45V. I plugged the red end of my volt meter into the middle wire and the black end of the volt meter to the black wire on the sensor and the meter said .30v, I went to adjust the tps sensor and noticed that it was adjust as far down as possible and if i adjust it the other way my voltage reading goes down? Right now my car is idling at 1500rpm and I saw it should be around 895 rpms, and if I adjust the sensor the idle goes up? Another bit of info at WOT my voltage reading from the TPS only goes to 3v which in searching it should be 4v. So Im pretty confused at this time any help would be appreciated. Thank you, Kyle

12-09-2011, 04:01 PM	#5
besTint Post Whore! Join Date: Mar 2008 Location: Stanton, CA Posts: 2,641 Trader Rating: (81) Rides Gallery: besTint Feedback Score: 81 reviews	did you try to clock the tps sensor? you may have the wrong tps sensor or like ^ the guy saids, it might be defective. find someone around you that will let you borrow an extra one to test. id give you one to borrow if you were local. __________________ http://squarespokes.com/

12-09-2011, 04:31 PM	#7
besTint Post Whore! Join Date: Mar 2008 Location: Stanton, CA Posts: 2,641 Trader Rating: (81) Rides Gallery: besTint Feedback Score: 81 reviews	Genuine OEM Nissan TPS (Throttle Position Sensor) Sensor SR20DET S13 they usually have it in stock. if you decide to buy a used one, i have a couple for sale. $50 shipped http://zilvia.net/f/sale-items/41651...0sx-parts.html #32 with stock SR throttle body. all are tested and in good working order. __________________ http://squarespokes.com/

12-09-2011, 03:36 PM	#2
sugarkouki Join Date: Dec 2011 Location: Long Beach Age: 37 Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	Any luck on this?

12-09-2011, 03:48 PM	#3
wileymotorsports Join Date: Dec 2011 Location: Arizona Age: 36 Posts: 34 Trader Rating: (0) Feedback Score: 0 reviews	no luck yet. I tested it agian last night and I got the same reading. Then I tried putting a spacer in between the TPS and throttle lever until it read correct voltage, started up my car and it idled right around 900 rpms, but the engine seemed to be cutting out slightly, Maybe a bad TPS? The car runs great, but my idles high and tps is reading incorrect, idk any help??

12-09-2011, 04:22 PM	#6
wileymotorsports Join Date: Dec 2011 Location: Arizona Age: 36 Posts: 34 Trader Rating: (0) Feedback Score: 0 reviews	Im thinking it might be a bad tps. I tried putting the negative end of the multimeter on a chassis ground and got the same results. I dont know anyone thatll let me borrow their sensor. Is there anyway of testing to make sure the sensor is faulty before dropping the $ on a new one? Can anyone recommened a good place to get a new one? Is this a SR20det specific sensor?

12-09-2011, 04:39 PM	#8
wileymotorsports Join Date: Dec 2011 Location: Arizona Age: 36 Posts: 34 Trader Rating: (0) Feedback Score: 0 reviews	Thanks for everyones help, im gonna mess with the sensor tonight to make 100% sure I am testing it properly. Ill probably end up ordering a new one. Is it ok to drive the car in the mean time?