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Wondering if TPS voltage is different on speed density cars

  • Thread starter Thread starter 97PSDdieselguy
  • Start date Start date Oct 12, 2011
9

97PSDdieselguy

New Member
May 23, 2011
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Oct 12, 2011
#1
  • Oct 12, 2011
  • #1
I have searched the FAQs, looked in tech and can't find the answer...please don't flame me. I checked my TPS voltage on my 87 5.0/5spd and I have .7V in the idle position with the engine off, it is ONLY 3.6V @ WOT....Now I also own an 88 Lincoln town car with a speed density 302---checked it, and it ALSO has .7V at idle with the engine off and 3.6V at WOT. My question---are the specs different for the earlier speed density cars? I wouldn't think so, but I don't want to spend $40 on a TPS if I don't need to.

Thanks in advance
 

Kdubslugga

Active Member
Jun 7, 2003
1,515
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38
Akron, OH
Oct 12, 2011
#2
  • Oct 12, 2011
  • #2
You know you can change the voltage by loosening the TPS and moving it around right? You want your voltage with key on engine off to be at least .9 volts, some guys swear by getting as close to .98 volts without going over. But to answer ur question no, speed density and mass air tps voltage doesnt change
 

Maryland Stang

Active Member
Aug 21, 2002
1,656
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39
Greenville, NC
Oct 13, 2011
#3
  • Oct 13, 2011
  • #3
As long as your idle voltage is at least .6 volts and not more than 1.1 volts then it's fine. The wide open throttle voltage should be at least 2.71 volts more than the idle voltage. So since you have .7 volts at idle and 3.6 volts at WOT then you're good to go.

The computer baselines to the voltage that the TPS is at everytime the car is started. Ford did this so they could just slap cars together rather than having to check and adjust each and every TPS that they put on an engine. Ford installed millions upon millions of TPS's.

Just about the only thing that Ford had to be adjust on older engines was the timing.
 
9

97PSDdieselguy

New Member
May 23, 2011
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Oct 13, 2011
#4
  • Oct 13, 2011
  • #4
Yes I read all the info on adjusting the TPS....but the highest voltage I could get was .7 base and 3.6 @ WOT. I didn't see the part about WOT being 2.71V over baseline. Everything I saw said somewhere around 4.5V, I took that to mean you needed 4.5 for the computer to read WOT. Thanks for the replies
 

Maryland Stang

Active Member
Aug 21, 2002
1,656
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39
Greenville, NC
Oct 13, 2011
#5
  • Oct 13, 2011
  • #5
97PSDdieselguy said:
Yes I read all the info on adjusting the TPS....but the highest voltage I could get was .7 base and 3.6 @ WOT. I didn't see the part about WOT being 2.71V over baseline. Everything I saw said somewhere around 4.5V, I took that to mean you needed 4.5 for the computer to read WOT. Thanks for the replies
Click to expand...

Nope. You only need .6 volts. Here, listen to this car. It's mine and the TPS reads aeound .80 at idle. Considering all of the work that I've done to it and the fact that I'm using the dreaded MAC MAF, it does and idles exactly like it should.

View attachment 168123
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,260
17,945
224
Massachusetts
Oct 13, 2011
#6
  • Oct 13, 2011
  • #6
97PSDdieselguy said:
Yes I read all the info on adjusting the TPS....but the highest voltage I could get was .7 base and 3.6 @ WOT. I didn't see the part about WOT being 2.71V over baseline. Everything I saw said somewhere around 4.5V, I took that to mean you needed 4.5 for the computer to read WOT. Thanks for the replies
Click to expand...

http://www.stangnet.com/mustang-forums/825424-adjusting-your-tps-0-98v-not-necessary.html

Did you read that thread?

Your numbers are fine. Disregard everything you know about tps and read the above thread. Should answer everything.

I'm trying to stress to guys to stop breaking out the multimeter to adjust the tps and Just dump the codes. If you don't have a tps code, no need to worry about the tps.
 
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