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Throttle position reading
- Thread starter gorman
- Start date
Hey guys; i was checking my pcm for fault codes and i noticed the throttle position reading goes from 19.2% to 86% at WOT. Should i recalibrate the pcm with an Xcal ? G.
Check to make sure the mat on yor drivers side is pulled back allowing the pedal to reach the bottom. Before you go adjusting anything on your xcal.
Hi Harrry, all the readings were from moving the throttlebody. The butterfly plate opens and closes fully. I was wondering if this is adding to my idling issues..since i have no fault codes for IACV etc... G.Check to make sure the mat on yor drivers side is pulled back allowing the pedal to reach the bottom. Before you go adjusting anything on your xcal.
as I recall from checking the throttle possition with my auterra scanner is those numbers are correct.
hi BrApple; thanks for that. Seems a bit odd though, you'd expect 0 and 100% so that the pcm can adjust everything else accordingly. If anyone can explain the reason..i'm always interested to learn..thanks G.as I recall from checking the throttle position with my auterra scanner is those numbers are correct.
well the sensor is off set when it is installed. ie it is already partly turned when the throttle is closed.
http://www.contour.org/ceg-vb/showthread.php?t=108
http://www.contour.org/ceg-vb/showthread.php?t=108
i understand the point that the tps is already turned some... in which case you would expect it to reach 100% and some. I was thinking you need to calibrate the movement the tps has into 100 parts, so that the engine is timed according to the true throttle position.. did i explain that clearly. ? G.
Tex
Hard-core CEG'er
Mine goes from 0-1.00 (0-100%) when data logging on the xcal. :shrug:
i was wondering if that is on a tuned/remapped setup or stock. Just trying to see if putting an oversized TB with non stock TPS throws the PCM calibrations out.Mine goes from 0-1.00 (0-100%) when data logging on the xcal. :shrug:
.. G.
Tex
Hard-core CEG'er
Mine is a 65mm TB with a replacement TPS, and I had nothing to do with the tune, so I really couldn't tell you.
SicSE
Veteran CEG'er
According to the Ford manual, WOT max measurement is 92.27% or 4.60v... so you look to be good there. However, closed throttle position range is 3.43% to 9.80% or 0.17 to 0.49v. You're over double this, so, either your TPS is giving an incorrect reading, or your throttle plate isn't closing completely... more likely the latter.Hey guys; i was checking my pcm for fault codes and i noticed the throttle position reading goes from 19.2% to 86% at WOT.
One reason the operating range is set where it is, is so a hard fault can be quicly and easily identified. A hard fault would typically result in a near-minimum, (0-1%), or near-maximum (99-100%) reading.Seems a bit odd though, you'd expect 0 and 100% so that the pcm can adjust everything else accordingly. If anyone can explain the reason..i'm always interested to learn.
Beans
Addicted CEG'er
appreciate that SicSE. Now i have a solid basis for measurement. I might swap out my mustang TPS and see if the SVT one is any better in the 65mm TB. ..G.
Uhh..yeah. Pretty sure your not supposed to use the mustang TPS
Uhh..yeah. Pretty sure your not supposed to use the mustang TPS
The 65mm tps is identical to the contour one. It can be used.
SoopaCooga
Veteran CEG'er
Not to mention you gotta use the TPS that was designed for the TB you're running...