TPS Report

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TPS Report; Setting the Throttle Position Sensor
Topic Started: Mar 10 2009, 09:19 PM (3,874 Views)
Bad Bent	Mar 10 2009, 09:19 PM Post #1
Facetious Educated Donkey Posts: 3,847 Group: Moderator Member #334 Joined: Dec 26, 2008 Location Native of SoCal, existing in McCall, Idaho Year/Make/Model 1991 and 1996 Geo Metros	Edit disclaimer: This Topic is being updated. Honestly, if you look in the picture I get a reading of 1.0 ohms. I don't believe the engine was on. It shouldn't be for testing resistance. Please read Post 34 for the pics of the 1991 and 1996 Service Manual procedures. The TPS should have a range test and a start point. IMHO. Chilton is sad when it comes to the TPS setting. It shows something injected and I have a throttle body. Go figure. They start with "back probe the signal wire..." I know what it means but why? I read metromad's post in WTF, FUEL POURING THROUGH MY MOTOR... which gave me a clear idea what was happening with the damn TPS. So I'll tell you what I did and add a picture. I removed the air cleaner. Unplug the TPS by just squeezing the plug and pull. I got a .014 feeler gauge and put it between the idle motor and stop (under the throttle set screw on my '91). I attached my Digital Multimeter to the alligator clip wires I had made up. I attached the other end of the alligator clips to the two rear pins on the TPS. Set the Multimeter to Volts. Loosen the two Phillips screws (to snug) on the TPS. 1996 Service Manual says; Turn the ignition key to 'ON' but don't start the car. Chilton says "turn the sensor until you get a reading of .98 to 1.02 Volts." This seemed to work for me. Tighten screws and reassemble. Oh, yes TPS Report is in reference to the 1999 comedy movie Office Space. A must watch, IMO. Edited by Bad Bent, Nov 16 2009, 01:22 PM.



Johnny Mullet	Mar 10 2009, 09:23 PM Post #2
"Geo Whisperer" Posts: 5,613 Group: Admins Member #1 Joined: Sep 7, 2008 Location Ashtabula, Ohio Year/Make/Model 97 & 98 Metro	Thanks for clearing that up for some of us! Very helpful.



2000Firefly1.3L	Mar 10 2009, 10:20 PM Post #3
Elite Member Posts: 513 Group: Members Member #470 Joined: Feb 13, 2009 Location Abbotsford, B.C. Year/Make/Model 2000 G13BB 1.3L SOHC 16valve 4-door \| 1995 1.3L SOHC 8valve 4-door (parts)	oh yeah, the tps report lulz



chads4drhatch	Mar 10 2009, 11:39 PM Post #4
Posts: 649 Group: Tech Certified Member #132 Joined: Oct 26, 2008 Location Dayton, Ohio, USA Year/Make/Model 1994 Geo Metro 4 door 5 speed 2009 Ford Focus 2.0L 5 speed	Bad Bent Mar 10 2009, 09:19 PM Chilton is sad when it comes to the TPS setting. It shows something injected and I have a throttle body. Go figure. They start with "back probe the signal wire..." I know what it means but why? I read metromad's post in WTF, FUEL POURING THROUGH MY MOTOR... which gave me a clear idea what was happening with the damn TPS. So I'll tell you what I did and add a picture. I removed the air cleaner. Unplug the TPS by just squeezing the plug and pull. I got a .014 feeler gauge and put it between the idle motor and stop (under the throttle set screw on my '91). I attached my Digital Multimeter to the alligator clip wires I had made up. I attached the other end of the alligator clips to the two rear pins on the TPS. Set the Multimeter to 20 ohms (upside down clip). Loosen the two Phillips screws (to snug) on the TPS. Chilton says "turn the sensor until you get a reading of .98 to 1.02 ohms." I works for me. Tighten screws and reassemble. Oh, yes TPS Report is in reference to the 1999 comedy movie Office Space. A must watch, IMO. Thanks Bad Bent!!! I have been wanting to test and set mine too. The haynes manual isn't very informative on doing this either.



jeff	Mar 11 2009, 04:28 PM Post #5
Posts: 374 Group: Valued Members Member #409 Joined: Jan 26, 2009 Year/Make/Model 1996Lsi/1998Geo/Metro	Thanxs. Anyone remember wordless workshop? (Popular Mechanics - mid sixties?) Any way this is greatstuff. This site is the She at. U da man bad Bent.



chads4drhatch	Mar 11 2009, 05:08 PM Post #6
Posts: 649 Group: Tech Certified Member #132 Joined: Oct 26, 2008 Location Dayton, Ohio, USA Year/Make/Model 1994 Geo Metro 4 door 5 speed 2009 Ford Focus 2.0L 5 speed	mine is defective!!!! I did the test only to find that the sensor is open, no resistance or continuity whatsoever....hmm possible cause of my idle troubles??? I think so!!!! It didn't even change when moving the tensiometer back and forth. Edited by chads4drhatch, Mar 11 2009, 05:10 PM.



Manny	Mar 11 2009, 06:23 PM Post #7
Posts: 411 Group: Tech Certified Member #499 Joined: Feb 21, 2009 Location Costa Rica Year/Make/Model 1997 Metro LSI 1.3L Auto Transm	Most probably dude! What kind of idle issue by the way? did you test it out using two back pins of the TPS connector like they said?



Bad Bent	Mar 11 2009, 07:01 PM Post #8
Facetious Educated Donkey Posts: 3,847 Group: Moderator Member #334 Joined: Dec 26, 2008 Location Native of SoCal, existing in McCall, Idaho Year/Make/Model 1991 and 1996 Geo Metros	Could be a vacuum leak or a idle control motor?



chads4drhatch	Mar 11 2009, 10:09 PM Post #9
Posts: 649 Group: Tech Certified Member #132 Joined: Oct 26, 2008 Location Dayton, Ohio, USA Year/Make/Model 1994 Geo Metro 4 door 5 speed 2009 Ford Focus 2.0L 5 speed	Manny Mar 11 2009, 06:23 PM Most probably dude! What kind of idle issue by the way? did you test it out using two back pins of the TPS connector like they said? yeah i used the two correct pins, my car idles wherever the hell it wants too, its a little difficult to start sometimes and when it does start its shaky and around 600 RPM. After a bit of driving it idles around 800, but when fully warmed up it idles around 1300 RPM. Sometimes when coming to a stop it drops back to 600 and acts like its going to stall but it doesn't. Its so weird, I have checked and replaced alot of vacuum lines and my compression is great, performance is outstanding compared to my friends metro (which is newly rebuilt) and I even beat him in a race! I advanced my timing recently it didnt affect anything except its pickup is a bit better.



chads4drhatch	Mar 11 2009, 10:11 PM Post #10
Posts: 649 Group: Tech Certified Member #132 Joined: Oct 26, 2008 Location Dayton, Ohio, USA Year/Make/Model 1994 Geo Metro 4 door 5 speed 2009 Ford Focus 2.0L 5 speed	Bad Bent Mar 11 2009, 07:01 PM Could be a vacuum leak or a idle control motor? not vacuum leak, check and replaced most of those. I am starting to wander about the idle motor though, but I'm going to get a spare TPS at the junkyard and try that first, since I'm 99% sure its bad.



yezok	Nov 6 2009, 03:27 AM Post #11
New Member Posts: 8 Group: Members Member #1,392 Joined: Nov 6, 2009 Location Regina, Canada Year/Make/Model 94 Geo Metro	chad8329 Mar 11 2009, 10:11 PM Bad Bent Mar 11 2009, 07:01 PM Could be a vacuum leak or a idle control motor? not vacuum leak, check and replaced most of those. I am starting to wander about the idle motor though, but I'm going to get a spare TPS at the junkyard and try that first, since I'm 99% sure its bad. I am an electronics technician and I have a 94 Geo Metro that I bought for a song, the only problem was that it would not Idle. The car would start and then stall but if you lightly steped on the accelerator pedal it would run like a dream. The TPS that was installed on the throttle body the does the same, no connection between the A and B pins (The two pins closest to the fire wall.) I have cracked the TPS apart and there is no wiper in the TPS for the switch between pins A and B, so hence no connection possible no matter where you turn it. Pins C and D measure 1.783 ohms when the TPS is rotated fully counter clockwise and .648 when rotated fully clockwise. I have come to the conclusion that when the previous owner replaced the TPS The parts guy gave him the wrong one from possibly a 1 liter L3 with the newer TBI with the IAC and not for the TBI with ICS. A lot of the time the parts counter guys give you the wrong part because the don't read the * captions in the parts books eg. W/with IAC or W/ICS. I gave the part number on the TPS to a part guy at the my local parts store and he said it was the wrong one for a 94, I trust him he has been at it for over 25 years and e showed me in the book it listed two different part numbers one for $210 and the other was $305. I am going to go to a wrecker and grab as many of these puppy's as I can



Bad Bent	Nov 6 2009, 12:53 PM Post #12
Facetious Educated Donkey Posts: 3,847 Group: Moderator Member #334 Joined: Dec 26, 2008 Location Native of SoCal, existing in McCall, Idaho Year/Make/Model 1991 and 1996 Geo Metros	Welcome to the forum, yezok! Thanks for the info. that's really good to know. If you have time, care to introduce yourself in Introductions and maybe pics of your ride? or not, but thanks.



ki4syr	Nov 6 2009, 01:26 PM Post #13
Metro Newbie Posts: 169 Group: Members Member #274 Joined: Dec 2, 2008 Location N.C. Mountains Year/Make/Model '10 Forester, '10 WRX	ICS?



Mr Murf 59	Nov 6 2009, 03:20 PM Post #14
Looking like a lost Irish tourist Posts: 2,408 Group: Tech Certified Member #928 Joined: Jul 2, 2009 Location Humboldt Co. CA Year/Make/Model 94 Geo Metro 1.0L, 99 Chevy Metro 1.0L both 5spds	It makes me feel like a dullard. What does the TPS do? I am used to running carbs. Not injection. Also why is/are we adjusting it?



bogs	Nov 6 2009, 05:20 PM Post #15
Duct tape heals all wounds Posts: 2,743 Group: Valued Members Member #1,286 Joined: Oct 5, 2009	Well, correct me if I'm wrong (and I may well be, carb man too), I think the TPS = throttle positioning sensor, it tells your computer how much of your foots in the pedal, how much fuel to dump, and works by measuring resistance. I miss the carb days myself



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