TPS voltages
Thread Starter
Safety Car
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
TPS voltages
After i set me idle I set my TPS voltage to .54 just like i read. But at WOT i read its supposed to be at 5 volts....mine sits at about 2.5. Is the TPS faulty?
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
I can never remember when the self-adjusting TPSs came into plya, but I think it was '92. You should test your 5v reference wire to make sure you are getting 5v before tossing your TPS. I can't remember which wire it is at the TPS (there are 3), but put a multimeter to a ground and then each wire and one of them should be obvious.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Have you removed the TPS from the car? If so, you may not have the tang from the TB properly engaged with the TPS. Especially if you have had it off of the car, remove it again and check for the full voltage range, and a smooth steady increase in voltage as you move the lever. If it checks out OK, very carefully, make sure the tang is properly engaged as your re-install the TPS.
RACE ON!!!
RACE ON!!!
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
What year Vette?? If '90 or newer the TPS is not adjustable and the ECM will "learn" idle & WOT settings.
With the connector unplugged, check resistance as you slowly move the throttle from idle to WOT position. Resistance should increase smoothly with no jumps nor dead spots.
With the connector unplugged, check resistance as you slowly move the throttle from idle to WOT position. Resistance should increase smoothly with no jumps nor dead spots.
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Thread Starter
Safety Car
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
Originally Posted by MaxLean
Are you getting full throttle? Open the throttle by hand at the throttle body and see what the TPS indicates.
Burning Brakes
Joined: Dec 2002
Posts: 1,088
Likes: 0
From: Lakeland fl
I had to enter my zip code because I didnt look for yours, but for a 90 Vette, Autozone.com says $44.99. Heres the link;http://autozone.com/servlet/UiBroker?UseCase=C001&UserAction=loadPag e
Ok the link isnt working, maybe you can copy and paste it, sorry.
Ok the link isnt working, maybe you can copy and paste it, sorry.
Le Mans Master
Joined: Jan 2003
Posts: 5,858
Likes: 7
From: Santa Maria CA
I got a brand new in the box TPS from CarQuest that has never been used. I thought mine was bad but found that it was not, so it's just laying around. Just pay shipping and it's yours. If you want/need it just let me know. 
Le Mans Master
Joined: Jul 2002
Posts: 5,818
Likes: 2
From: Alive and well in Burlington NC
Originally Posted by jimmers
thanks for the replies guys. I will check out the 5v wire before dishing out $87 for a TPS just to be sure. I figured somthing was wrong with my voltages.
Originally Posted by scorp508
$87....? Jebus! I think mine was $25 from Autozone.
