TPS voltage ??
Thread Starter
Joined: Jan 2000
Posts: 659
Likes: 10
From: Clifton, NJ
Car: '88 Formula
Engine: 350 TPI
Transmission: T-5... in need of slight rebuild
TPS voltage ??
I have the PTS set at .54 volts at idle, but at full throttle it reads about 4.3 volts. When I use Craig Moates software the car idles at 10% and full throttle is about 85% throttle. Is this a sign of a bad TPS, I can't find any information about what it should read at full throttle. Also if it is bad, would it cause a bog at tip in? It sounds like a good theory to me!
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'86 TA, T-tops, T-5, 3.73, 4 wheel disks 350, compucam 2040, performer intake,SLP Headers, 3" race magnum muffler, 1.6 Comp rockers, Ripper shifter, perf. friction pads, Hypertech ignition, Earls brake hoses, Hotchkis springs, Tokico Illumina 5 adjustable shocks and struts, Lakewood panhard and trailing arms
14.50@ 97 with carb... now converted to TPI
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'86 TA, T-tops, T-5, 3.73, 4 wheel disks 350, compucam 2040, performer intake,SLP Headers, 3" race magnum muffler, 1.6 Comp rockers, Ripper shifter, perf. friction pads, Hypertech ignition, Earls brake hoses, Hotchkis springs, Tokico Illumina 5 adjustable shocks and struts, Lakewood panhard and trailing arms
14.50@ 97 with carb... now converted to TPI
Supreme Member
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From: In reality
Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
<font face="Verdana, Arial" size="2">Originally posted by slowTA:
I have the PTS set at .54 volts at idle, but at full throttle it reads about 4.3 volts. When I use Craig Moates software the car idles at 10% and full throttle is about 85% throttle. Is this a sign of a bad TPS, I can't find any information about what it should read at full throttle. Also if it is bad, would it cause a bog at tip in? It sounds like a good theory to me!
</font>
I have the PTS set at .54 volts at idle, but at full throttle it reads about 4.3 volts. When I use Craig Moates software the car idles at 10% and full throttle is about 85% throttle. Is this a sign of a bad TPS, I can't find any information about what it should read at full throttle. Also if it is bad, would it cause a bog at tip in? It sounds like a good theory to me!
</font>
then, why is the inital adjustment that high?.
Have you set the min idle speed?.
Check the intial timing?.
Generally if all that is correct then you'll have resolved the problem.
Thread Starter
Joined: Jan 2000
Posts: 659
Likes: 10
From: Clifton, NJ
Car: '88 Formula
Engine: 350 TPI
Transmission: T-5... in need of slight rebuild
Yes, the gas pedal opens the throttle right to the stoper, min. idle is set, timing is at 6 degrees. So apparently this isn't a general problem. Just my luck.
What does your throttle postion read when using Graig's software.. or whatever software you are using?
What does your throttle postion read when using Graig's software.. or whatever software you are using?
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From: Pasadena, MD
Car: '87 Camaro IROC-Z
Engine: 385 HSR
Transmission: 700R4
Axle/Gears: 3.42 posi
It's a problem with Craig's software. He's calculated %TPS by using 0 volts as 0% throttle and 5 volts as 100% throttle, but that's not how GM does it. 
Bruce, any idea on how it's supposed to be calculated?
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Greg Westphal
'87 IROC 355TPI/A4
Bruce, any idea on how it's supposed to be calculated?------------------
Greg Westphal
'87 IROC 355TPI/A4
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From: ILL
Car: 1986 Pontiac TA
Engine: 383
Transmission: 700R4
Axle/Gears: 3.70
The answer to your question is:
TPS voltage at idle should be .54 volts.
TPS voltage at WOT should be 4.49 volts.
A + or - .07 volts is acceptable.
www.geocities.com/dzperf
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D&Z Performance
"Putting Power to the Pavement"
TPS voltage at idle should be .54 volts.
TPS voltage at WOT should be 4.49 volts.
A + or - .07 volts is acceptable.
www.geocities.com/dzperf
------------------
D&Z Performance
"Putting Power to the Pavement"
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