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JW Apostate
Join Date: May 2004
Location: Napa, Ca
Posts: 14,164
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OBD II live data
Looking at the TPS values in real time.
3.5% at idle and 75% at WOT. Shouldn't be 0-100%? Also the MAF shows a value while the car is off. Wonder if those two components should be replaced? KT
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'74 914-6 2.6 SS #746 '01 Boxster |
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05-22-2012, 06:48 PM
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canna change law physics
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I never submit my TPS reports
I recently picked up a couple of Bluetooth OBD II transmitters. There are lots of cool Android and iPhone apps to track and record this stuff in real time.
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James The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994) Red-beard for President, 2020 |
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05-22-2012, 06:58 PM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 56,107
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My tps values also don't go from 0 - 100. I think that's pretty normal depending upon the vehicle and reader. I bet if you spoke to other folks with the same vehicle, they'd see similar readings.
Well, there's always atmospheric pressure, right? So should you always get a reading? My car doesn't support a maf reading through the obdii, so I can't compare.
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
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05-22-2012, 06:59 PM
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JW Apostate
Join Date: May 2004
Location: Napa, Ca
Posts: 14,164
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'98 VW Jetta, here.
Quote:
I cleared the code 0103, it hasn't returned yet and did not trip the CEL. KT
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'74 914-6 2.6 SS #746 '01 Boxster |
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05-22-2012, 07:11 PM
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JW Apostate
Join Date: May 2004
Location: Napa, Ca
Posts: 14,164
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Quote:
I really need those TPS reports... KT
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'74 914-6 2.6 SS #746 '01 Boxster |
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05-22-2012, 07:14 PM
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You do not have permissi
Join Date: Aug 2001
Location: midwest
Posts: 39,908
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I don't remember much from school, but....I think....the sensors should send a small value back to the computer, even when inactive, to show they are connected and returning a signal voltage.
Not sure if 3.5% is the usual low value. That 75% at WOT might be some cable slack(?). The potentiometer inside can get gummed up with carbon and get lazy. You might be able to check the full TPS range using the scanner with KeyON-EngineOFF using the pedal and/or pushing the pivot. |
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05-22-2012, 07:22 PM
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JW Apostate
Join Date: May 2004
Location: Napa, Ca
Posts: 14,164
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I ran the test with key on only.
Maybe I should disassembled the throttle body and MAF and clean them thoroughly. KT
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'74 914-6 2.6 SS #746 '01 Boxster |
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05-22-2012, 07:25 PM
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Too big to fail
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Quote:
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"You go to the track with the Porsche you have, not the Porsche you wish you had." '03 E46 M3 '57 356A Various VWs |
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05-22-2012, 07:26 PM
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You do not have permissi
Join Date: Aug 2001
Location: midwest
Posts: 39,908
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A day at the office is like using the restroom.
It's not finished until the paperwork is done. (grandpa's joke) |
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05-23-2012, 04:52 AM
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Super Moderator
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Never seen one go from 0-100... Mine reads 0-75
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Chris ---------------------------------------------- 1996 993 RS Replica 2023 KTM 890 Adventure R 1971 Norton 750 Commando Alcon Brake Kits |
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05-23-2012, 06:16 AM
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JW Apostate
Join Date: May 2004
Location: Napa, Ca
Posts: 14,164
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Quote:
That helps. KT
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'74 914-6 2.6 SS #746 '01 Boxster |
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05-23-2012, 09:03 AM
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Registered
Join Date: May 2008
Location: Harford Co, MD
Posts: 1,623
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I know at least on my mazda that "full throttle" is nowhere near 100%.
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-Brad 2002 Carrera2 1986 944 Turbo |
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05-23-2012, 09:53 AM
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1970/1982 Porsche 914-6/911SC 2.7 RS
1970 Porsche 911 S 
