Hesitation and idle problems from a bad TPS (OBD1 Eclipse)

In this video I’ll show how to retrieve trouble codes from an OBD-I vehicle, a 1991 Eagle Talon (which is a Mitsubishi Eclipse), and how to test a throttle position sensor with a graphing multimeter. The TPS testing shown will also work on all three-wire potentiometers, and can be applied to any vehicle. The code retrieval procedure shown is make/model specific, so consult your service information for your application. Engine Performance Diagnostics chapter 7 Symptoms - intermittent check engine light illumination - hesitation on acceleration - surging idle Fix - replace faulty throttle position sensor Tests shown - retrieving trouble codes manually from an OBD-I vehicle - using a graphing multimeter during trouble code retrieval - how to test a 3-wire potentiometer without a wiring diagram (all types) - performing a TPS ‘sweep test’ using a graphing multimeter - using heat and vibration to expose electrical faults Tools used - graphing multimeter Playlist - (Chapter 7) Potentiometer-position sensor tests TPS, EVP, APP, VAF etc https://www.youtube.com/playlist?list=PLAFYVCyenqcoHHRsegwvlLd0MYKazby99 Related videos - How to test TPS wiring with a scan tool (any car) https://youtu.be/VhyNp7IsfQM - How to test throttle position sensor wiring with a resistor (any car) https://youtu.be/oZiroWQRgEc - Throttle Position Sensor test (voltmeter and scope) https://youtu.be/8KfKfImoIXg - How to test a throttle position sensor (P0121, P0122) GM wiring integrity https://youtu.be/h17kYyFrExE For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book. Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium right here on YouTube. There is a 14 day free trial. On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!

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How to test throttle position sensor wiring with a resistor (any car)
If you follow a manufacture flow chart when troubleshooting computer inputs and outputs, they almost always have you disconnect the computer and sensor to perform resistance measurements on the wiring to isolate the problem. This is a very time consuming process that can be completely bypassed with even better and more accurate results following my methods. In this video I will show you how to quickly and safely check the wiring, sensor and computer using scan data and a 5000 ohm resistor. An incandescent test light may be used as a substitute for the 5k ohm resistor. Engine Performance Diagnostics chapter 10 Tests shown - how to quickly test sensor wiring (any 3 wire potentiometer or pressure sensor circuit on any car) Tools used - 5k ohm resistor (incandescent test light may be used instead) - digital multimeter - scan tool - backprobing pins Playlist - (Chapters 9, 10 and 11) The 5v Reference and Signal Circuit Quick Tests https://www.youtube.com/playlist?list=PLAFYVCyenqcpP9ykkWb2D16nVEjyQ1eTZ Related videos - Power Steering Pressure Sensor Test (P0550) - Toyota https://youtu.be/WLLxcfC-zeQ - How to test a throttle position sensor (P0121, P0122) GM wiring integrity https://youtu.be/h17kYyFrExE - How to test TPS wiring with a scan tool (any car) https://youtu.be/VhyNp7IsfQM - How to test an EGR DPFE sensor (EGR flow test) - Ford, Lincoln, Mercury https://youtu.be/GDfxNHsPLCU For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book. Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium right here on YouTube. There is a 14 day free trial. On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!





Stage 0 TPS sensor cleaning
Followup to the video about different throttlebodies how to clean the TPS sensor





How to test an Idle Air Control (IAC) valve - Nissan/Infinity
How to test a Nissan 6-wire stepper type IAC motor. Engine Performance Diagnostics Chapter 20 pages 15-20 Symptoms - stalling - start stall - high idle - check engine light (P0505 trouble code) Fix - replace faulty IAC valve Tests shown - how to test a 6 - wire stepper motor - how to verify control circuit integrity - how to test a computer driver - IAC motor voltage waveforms Tools used - test light (LED type is preferred for this test) - lab scope - scan tool - back-probing tools Playlist - (Chapter 20) Idle Speed Problems and Testing https://www.youtube.com/playlist?list=PLAFYVCyenqcrqC1WhVE1LTzQSn4mbMjdu Related videos - Idle speed control error fault codes (P0507) - vacuum leak https://youtu.be/PKJnW08-Z8c - Ford idle air control valve (IAC) test - stalling problems https://youtu.be/0r3nCwZsS3M - Ford Idle Air Control (IAC) valve test (how to adjust minimum idle speed) https://youtu.be/ayjhL9jpFH8 - Solenoid Type idle air control valve IAC test using a Picoscope - Ford https://youtu.be/WoFt3uzQd44 For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book. Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium right here on YouTube. There is a 14 day free trial. On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!





How to Fix a High Idle - TPS Adjust
In this video Sean will show you how to diagnose and fix a high idle in which your adjustable TPS sensor is the cause. Not all engines have an adjustable TPS but if so, this should be one of the first things you look for after a vacuum leak. Website: http://www.bleepinjeep.com FaceBook: http://www.facebook.com/BleepinJeep *This product is meant for entertainment purposes only. Your mileage may vary. Do not try this at home. Void where prohibited. Some assembly required. For off-road use only. Slippery when wet. Batteries not included. Do not use while operating a motor vehicle, heavy equipment, cherokee XJ, wrangler TJ, wrangler JK, or any Jeep vehicle, especially the newer Fiat ones. How-to videos may be too intense for some viewers and children under 30 years of age. Please remain seated until the 4x4 ride has come to a complete stop. Studies have shown viewing these videos causes increased cancer risks in laboratory test people. I am not a professional, I have no training, I'm not even particularly good at horse whispering. Don't believe everything that you know. Please keep your hands in the vehicle at all times. Do not tap on glass. Do not eat anything that has been on the floor for more than 3 days. Keep your hands to yourself. Not to be taken internally. Reproduction strictly prohibited. Driver does not carry cash. Objects in Bleepinjeep mirrors may be farther than they appear.* 04128




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