TPS: what voltage (min.) for WOT

Reply Subscribe

Thread Tools

Search this Thread

Apr 18, 2005 | 05:48 PM

tsts

Thread Starter

Drifting

Joined: Oct 2004

Posts: 1,975

Likes: 9

From: "Philly" Pennsylvania

TPS: what voltage (min.) for WOT

I know idle voltage of .3 to .9 volts is considered as "0" by computer, but what about the other end (WOT). I know 4.6 is considered good in real readings, in theory 5v. is max. possible. Assuming throttle plates are wide open, what is considered min. WOT TPS voltage to have computer maximize injector output (signal) ???

Apr 18, 2005 | 06:06 PM

geezel

Burning Brakes

Joined: Nov 2003

Posts: 1,234

Likes: 5

From: Herriman UT

4.0v Or greater is sufficient to signal the ECM of a WOT condition.

Apr 18, 2005 | 07:01 PM

JAKE

Le Mans Master

Joined: Feb 2000

Posts: 9,715

Likes: 27

From: Kempner Texas

Quote:

Originally Posted by geezel

4.0v Or greater is sufficient to signal the ECM of a WOT condition.

Yep. In fact, the Shop Manual for the 86 says anything higher than 4.5 will set a TPS High Voltage error code.

Never saw any reference to .3 to .9 being considered "0" by the computer. Where'd you get that?

I don't know what year you have, but for the 86, .54 (+/- .075) is considered to be within spec. That means anythinhg from .615 on the high end to .465 on the low end is okay.

Many find that setting it at the of the scale offers improved throttle response.

Jake

Apr 18, 2005 | 07:02 PM

scorp508

Team Owner

Joined: Mar 2000

Posts: 83,381

Likes: 87

From: Boston, MA

69% throttle is considered WOT for an '87 and other years. 3.45v, not much.

Apr 18, 2005 | 08:22 PM

tsts

Thread Starter

Drifting

Joined: Oct 2004

Posts: 1,975

Likes: 9

From: "Philly" Pennsylvania

Jake,
Never saw any reference to .3 to .9 being considered "0" by the computer. Where'd you get that?

Stated in my Helms manual for a '94.

Apr 18, 2005 | 08:27 PM

tsts

Thread Starter

Drifting

Joined: Oct 2004

Posts: 1,975

Likes: 9

From: "Philly" Pennsylvania

Thanks Geezel, Thats what I was looking for.

Apr 18, 2005 | 10:07 PM

Lone Ranger

Le Mans Master

Joined: Feb 2002

Posts: 7,858

Likes: 2

Quote:

Originally Posted by tsts

Your 94's TPS will likely not read over 4.0v when the throttle is pegged.

Doesn't matter. On LT1's, the PCM reads as little as 3.75v as 100% TPS. All the 4.6v and 5v talk is for L98's.

Apr 19, 2005 | 02:59 AM

JAKE

Le Mans Master

Joined: Feb 2000

Posts: 9,715

Likes: 27

From: Kempner Texas

Quote:

Originally Posted by tsts

Jake,
Never saw any reference to .3 to .9 being considered "0" by the computer. Where'd you get that?

Stated in my Helms manual for a '94.

Okay, so you must have one of the non-adjustable TPS'.

It would help you posted the year of your car in the intial post. GM loves to change things.

Jake