Funny TPS readings ...

Kdw1403 · 10-07-2019, 03:43 PM

My data logger on my fast system shows my TPS is not at 100% during some of my bad runs. The O 2 reading will show very very lean when this happens. Can I get a new stock TPS from parts store and put on?

Bobby Fazio · 10-07-2019, 06:22 PM

If it is GM I am pretty sure you can pick that up at the parts house. What system are you running? Pull it off the throttle body and see if the plastic is all chewed up. If it is loose and vibrating going downtrack you will get erratic readings and that will be detrimental to the performance, especially in Alpha N mode.

Kdw1403 · 10-07-2019, 06:27 PM

Fast xfi2.0. I’ll take it off and check. Thanks

Larry Hill · 10-08-2019, 11:51 AM

Fast web site lists those parts

countrypuppy4865 · 10-08-2019, 01:18 PM

I would recommend using an OEM TPS sensor. What is the application? Have you learned the tps sensor?

Kdw1403 · 10-08-2019, 09:28 PM

I just bought a TPS. Do I just install it or as you say do I have to calibrate it or learn it? Your car was flying in St. Louis.

countrypuppy4865 · 10-10-2019, 06:44 PM

Quote:

Originally Posted by Kdw1403

I just bought a TPS. Do I just install it or as you say do I have to calibrate it or learn it? Your car was flying in St. Louis.

Anytime you change a sensor you definitely want to calibrate it.

Ed Wright · 10-10-2019, 07:49 PM

Easiest way I know, is to slot the little screw holes in the TPS, so it can be rotated like an earlier year model adjustable TPS.
I have not had one fail to show 100% Throttle Angle, if the Throttle Body is opening all the way, against the stop. Don’t buy your sensors at Autozone. Use genuine AC Delco, or NAPA.

cmracing · 10-12-2019, 10:48 PM

Most newer EFI systems have a TPS calibration procedure in them. Heck, my old Haltech I used to run back in the early 90's had a way to calibrate the sensor.

10-07-2019, 03:43 PM	#1
Kdw1403 Member Join Date: Nov 2016 Posts: 205 Likes: 48 Liked 68 Times in 22 Posts	Funny TPS readings ... My data logger on my fast system shows my TPS is not at 100% during some of my bad runs. The O 2 reading will show very very lean when this happens. Can I get a new stock TPS from parts store and put on?

10-07-2019, 06:22 PM	#2
Bobby Fazio VIP Member Join Date: Nov 2009 Location: Egg Harbor Township, NJ Posts: 1,467 Likes: 1,441 Liked 4,365 Times in 501 Posts	Re: Funny TPS readings ... If it is GM I am pretty sure you can pick that up at the parts house. What system are you running? Pull it off the throttle body and see if the plastic is all chewed up. If it is loose and vibrating going downtrack you will get erratic readings and that will be detrimental to the performance, especially in Alpha N mode. __________________ '65 Mustang SS/L & L/SA DriverInterviews.com \| App.DragInsights.com

10-07-2019, 06:27 PM	#3
Kdw1403 Member Join Date: Nov 2016 Posts: 205 Likes: 48 Liked 68 Times in 22 Posts	Re: Funny TPS readings ... Fast xfi2.0. I’ll take it off and check. Thanks

10-08-2019, 11:51 AM	#4
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,615 Likes: 1,901 Liked 10,657 Times in 2,212 Posts	Re: Funny TPS readings ... Fast web site lists those parts __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

10-08-2019, 01:18 PM	#5
countrypuppy4865 Senior Member Join Date: Nov 2003 Location: Donaldsonville, LA Posts: 978 Likes: 17 Liked 228 Times in 70 Posts	Re: Funny TPS readings ... I would recommend using an OEM TPS sensor. What is the application? Have you learned the tps sensor? __________________ Jimmy "Cooter" Hidalgo, Jr. 4865 E/SA '04 GTO 4865 SS/GA '99 Firebird

10-08-2019, 09:28 PM	#6
Kdw1403 Member Join Date: Nov 2016 Posts: 205 Likes: 48 Liked 68 Times in 22 Posts	Re: Funny TPS readings ... I just bought a TPS. Do I just install it or as you say do I have to calibrate it or learn it? Your car was flying in St. Louis.

10-10-2019, 07:49 PM	#8
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Funny TPS readings ... Easiest way I know, is to slot the little screw holes in the TPS, so it can be rotated like an earlier year model adjustable TPS. I have not had one fail to show 100% Throttle Angle, if the Throttle Body is opening all the way, against the stop. Don’t buy your sensors at Autozone. Use genuine AC Delco, or NAPA. __________________ Ed Wright 4156 SS/JA

10-12-2019, 10:48 PM	#9
cmracing Member Join Date: Aug 2016 Posts: 173 Likes: 113 Liked 62 Times in 29 Posts	Re: Funny TPS readings ... Most newer EFI systems have a TPS calibration procedure in them. Heck, my old Haltech I used to run back in the early 90's had a way to calibrate the sensor.