Question about Cars & Trucks

Open Question

How do i test to see if TPS is bad without tester

Posted by on

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

How can i tell if the thottle position sensor is bad without a multi meter and how do you adjust it when reinstalling

What make , model an year vehicle ? An engine size . Most TPS sensors are non adjustable . An you can't tell if it's bad without testing . Suggest you take your vehicle to a qualified repair shop that know how to test an replace a TPS , because i think your just guessing , looking for a magical fix .That's not how we repair automobiles .

Mar 21, 2017 | Cars & Trucks

1 Answer

Why is it hard to start and won't continue running?

Could be any number of things, A few are, weak fuel pump, bad TPS bad CPS, Plugged injectors, bad ECT...Your best bet is to get an OBD II tester plugged in and retrieve the codes from the computer.

Dec 14, 2015 | 2005 Chevrolet Uplander

1 Answer

Why after removing throttle control and replacing thermostat do i have no spark?

could be a blow fuse .check with a trouble light tester as a meter can give a faulty reading unless under load.

Aug 16, 2014 | Cars & Trucks

1 Answer

Symptoms of a bad tps

old post. but....
a great question, but on a tracker , the TPS , has 2 parts inside
cascaded as one part. so that makes answers harder.
the tests are here.

  1. idle switch bad, means, idle never regulates.
  2. end idle side.
  3. throttle angle side, is complex. (as seen in scan tool)
  4. it detects drivers fast right foot actions and enriches fuel this prevents the hesitation, when you accelerate. if bad it does just that. but does still have full power up hills (after small hesitation) due to the MAF sensor seeing reality and correcting the TPS (errors) see?
  5. the TPS also triggers. cut fuel mode when you decelerate,
  6. and triggers cut off of EGR and .
  7. and triggers , anti snap your next mode , when you decelerate too fast it adds air via the ISC to prevent violent Deceleration.
  8. I told you it was complex the FSM book from Suzuki and GEO both stated all that. on the TPS page.

get the Factory Service manual, real, and see those pages.

Apr 10, 2014 | 1996 Geo Tracker 2 Door

1 Answer

Jeep Grand Cherokee P1490

okay you have a few problems here, lets start with the rear taillight problem, these jeeps are none for the sockets going bad, this would be simple to test with atest light,

next po1489 and 1490 have nothing to do with plugs or fuel filter, these codes are for the high and low speed fan control. the cooling fan on radiator. so i would first start with the testing of the cooling fan, if the engine is running hot due to fans not working then this would cause loss of power and may damage engine, this may be due to bad relays or fan, the code po 0122 is for the tps, this may be a bad tps or a wiring problem, there are to ways to do this one is to test and the other is to replace, if you have a tester and a meter you can test voltage ground and ref signal to tps or you can replace it and if the problem is still there (the code) then you will have to test.
the tps code may be the problem for lack of power.
as far as the cruise control, the cruise will not operate with a check engine light on, this is the future, computer will shut it down. the light problems, coming on at times will need some testing and is hard for me to help you with out more info,

good day

Mar 31, 2013 | 2004 Jeep Grand Cherokee

1 Answer

I have a 1990 hyundai excel that idles irratic when I first shift into drive in the morning, sometimes stalls when I hit the gas. Problem seems to go away as car warms up. Timmings good, compressions good,...

Without actually inspecting/looking at the vehicle, the problem sounds like it's the Throttle position sensor (TPS). Before buying this component, you need to 'bench-test' it to be sure. The TPS is merely a potentiometer (variable resistor - POT) with center tap and two wiper plates (when the throttle is fully closed, the resistance in TPS A is at maximum and in TPS B is at minimum. When the throttle is wide open (W.O.T. - wide open throttle, the resistances of 'A' and 'B' circuits are opposite each other - A minimum and B maximum). The computer (Engine Control Unit - ECU) uses/monitors these signals to adjust/manage the fuel map (fuel trims). Using an analog Ohm Meter, you can test the TPS (or contact someone who knows how), to check for bad spots (erratic resistance changes) in the POT. If the POT is bad, you'll most probably find the problem where the POT is in/near the "IDLE" position... since that's where you mentioned sometimes 'stalls' when you hit the gas.

Feb 08, 2011 | 1990 Hyundai Excel

1 Answer

Wont switch gears tell at 5500 rpms

check out tps sensor it has a big effect on shifting of vehicle. The data provided by TPS is invaluable for proper startup, idle and easy throttle response of the car. These operations are affected when a bad throttle position sensor feeds erroneous data to the car's computer because of which the:
  • Engine malfunction indicator light (MIL) is turned on
  • The driver of a car experiences difficulty while changing gears.
  • The fuel economy of the car drops drastically.
  • Causes difficulty in setting base-ignition-timing of the car a bad tps causes transmission shift issues, bucking, jerking, idle surging, engine cut off, hesitation on take off, surge while cruising down highway. it may not be that but try another one and find out. you can test the tps, just unplug connector to it. use a ohms meter and hook one lead to the top and other to the center prongs on tps itself. next move throttle very slow, if good tps will move needle on ohms tester it will sweep up without cutting out. but if you perform this test and the needle hesitates at any time you move throttle plate it is bad. 1 is ground, 2 is signal, the prongs on tps. good-luck

Jan 29, 2011 | 2001 Chevrolet Malibu

1 Answer

How can I be sure if it's my tps that's bad?

A scan tool is necessary to check the TPS voltage so if tool not available have a local shop or dealer perform this. Otherwise a check engine light may be induced from the mis-adjusted TPS sensor. There is the old school way to check and your going to need a multi meter. Disconnect the wire harness from the TPS and use the multi meter to test the resistance on the TPS, as you turn the throttle up the resistance should go up as a contain value in a smooth readings without any jumps. Good luck and hope this helps, keep me posted be glad to help and why do you think there is a TPS malfunction

Jun 29, 2009 | 2000 Chevrolet 2500

1 Answer


The tester tells you there is a problem in the TPS circuit, it does not mean that the sensor is bad, it means the entire circuit has a problem, what does this mean? well the TPS can be the problem, the connector may have a bad pin, the wiring harness may have a problem due to a broken wire from engine flex on the harness (fiarly common), the Powertrain Control Module (PCM) may also have a connection problem at the PCM main connector, or the PCM may be the problem, in real life the sensor is most the common problem, the wiring to it the 2nd, and last is the PCM. This is why dealers have 10's of thousands of $'S in test equipment, to find issues like you have, the next thing to do is pin out the entire harness from the TPS back to the PCM, twist and bend every inch of the harness while you have a ohm meter on it, anymore than 5 ohms is a problem in any of the wires, make sure you go from the PCM out to the the TPS, the PCM and TPS must be disconnecteed during this pin point testing.

Nov 16, 2008 | 1998 Mitsubishi Montero Sport

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

18 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts


Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Randy Ohler

Level 3 Expert

14585 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides