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
Quote:
<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>
The first thing to do with check the mechanicals of the situation. Does the gas pedal even open the throttle all the way?.<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!
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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.
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?
Supreme Member
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
So everything is normal then.... thats great! Thanks for hte help Greg!
Banned
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
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D&Z Performance
"Putting Power to the Pavement"
Junior Member
So if I'm reading .7 + a little .... that would be too much for Idle?
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88 Formula WS6 TBI 350
The other hobby
http://home.rochester.rr.com/hoscar/indexn.html
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88 Formula WS6 TBI 350
The other hobby
http://home.rochester.rr.com/hoscar/indexn.html