06-05-2009, 11:23 AM
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#1
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Registered User
Join Date: Aug 2007
Location: Vancouver, BC
Posts: 82
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Q: What is throttle position at idle?
Hi gang,
I've been playing with the OBD scanner on my 2000 Boxster, and I noticed that at idle the TPS is reporting about 1%.
Everything seems perfect - I'm just wondering what this value should be? It seems to me that it should read zero without driver input...
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06-10-2009, 06:40 AM
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#2
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Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
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Fly by wire cars have NO idle air bypass like the cable cars. They crack the throttle blade 1% for idle 
Want to learn something scary? Turn the car off, but key on, and floor the gas pedal. Report back what it say's for TPS
B
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
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06-10-2009, 12:07 PM
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#3
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Registered User
Join Date: Jan 2009
Location: Corona, CA.
Posts: 129
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Quote:
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Originally Posted by Brad Roberts
Fly by wire cars have NO idle air bypass like the cable cars. They crack the throttle blade 1% for idle
Want to learn something scary? Turn the car off, but key on, and floor the gas pedal. Report back what it say's for TPS
B |
I didn't try it, but I'm guessing that the throttle is wide open for clear-flood mode.
__________________
Blue-S
2000 Boxster S 6-speed - Ocean Blue / Savanna Beige
* 9x7 short shifter * Pedro's enthusiast mount * Carrera Ltw. wheels * Stebro bypass pipes
* M030 coming soon! *
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06-10-2009, 12:16 PM
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#4
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Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
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We are seeing an average reading of only 88% when wide open. The highest I have seen is 92%. Most of us *thought* it should be 100% when wide open.
B
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
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06-11-2009, 05:20 PM
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#5
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Registered User
Join Date: Jan 2009
Location: Pleasanton, CA
Posts: 114
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My '04S registers 0% at idle, and 99.99% at WOT.
__________________
Demick
'04 Boxster S
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06-11-2009, 07:12 PM
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#6
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Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
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I know you and I totally forgot about the tranny stuff! Is it cool if I send Rob Ways over to pick it up? or did you off it already?
I'm beginning to wonder if the 88% cars need to have the Fly-By-Wire calibrated. Simple to do with the PSTII or the PIWIS.
B
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
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06-11-2009, 08:53 PM
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#7
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Registered User
Join Date: Aug 2007
Location: Vancouver, BC
Posts: 82
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Good info, thanks!
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06-12-2009, 04:03 AM
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#8
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Registered User
Join Date: Apr 2006
Location: Mass
Posts: 40
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Throttle Position
At idle my Throttle is at 2.27 with a value of 2.
I was having trouble with my throttle not opening all the way at higher RPM it turned out that the Fuel Injectors were mounted too low or about 20 thousand of an inch to far into the manifold...
At full Throttle it is now 99.9 with a value of 99.9
Egas model
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