Auto Electronic Sensors

FOR IMMEDIATE RELEASE
Blue Springs, Missouri, United States of America (Free-Press-Release.com) February 1, 2012 --

There are many different sensors on new cars these days. With the addition to fuel injection and computer controlled ignition systems it can be daunting for the regular guy to try to fix thats for sure. We will talk about each sensor individually and talk about how they work and how to test them. The throttle position sensor is simply a resistor, based on how far the pedal is pushed correlates to a voltage measurement. Most decent code scanners can read live engine data and you can read the voltage go up and down in real time. By seeing it change you can tell if its working correctly. As the pedal goes down the voltage goes up. Symptoms of a bad TPS sensor could include no power,high idle, or idle that doesn’t go down how it should. The Idle Air Control valve is just a small motor that goes in and out to a desired amount to control idle speed. As the ECM tells it too. You can also tell if its working by using a code scanner to see if the no. of counts the valve is moving either up or down. Sometimes on many IAC valves debris builds up on the end and causes idle problems a lot of times taking it out and cleaning with carb. cleaner can fix a idle issue. O2 sensors simply changes voltage based on amount of Oxygen thats in the exhaust. The O2 sensor often sets off your check engine light. Most of the time a O2 sensor gets inaccurate over time and costs you gas mileage but doesn’t cause much drive ability issues. The best way to check is your gas mileage. Its very easy to change most O2 sensors just one connector and on socket and just screw it out and screw a new one in there. If your guessing always try the upstream one first it get the most abuse. The crank and cam sensors create a signal and sends it to the ignition module to control spark timing. If you have spark these sensors are good.If one or more of these sensors are bad you will have no spark or fuel injector pulse. Ignition modules are small computers that often can be removed and tested at your local parts store. Alot of times when you have a vehicle that dies only when it warms up and restarts when it cools down this could be the problem. The thermostat i a sensor that mechanically moves in and out to control coolant flow into the radiator. As your car warms up this valve should open. If it sticks close your car will overheat very quickly in 5-10 minutes.If it sticks open your heater will never blow warm or take forever too. If your radiator still feels cold after5-10 minutes its stuck open.Temp. sensors can be read on you scanner too or just compare temp from the gauge to what the scanner says. If your temp gauge is all over the place its probably bad or you have air in the cooling system like if you just drained and flushed the system. All you need is spark fuel and air for a car to run.If you have no spark its somewhere in the ignition system.No fuel just see if it tries to run on a little shot of carb. cleaner, if it does you know it has spark now so you would look at the fuel system. A no start can be simple to fix if you follow these simple procedures.

Written by/Jeremy Jennings

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