By the end of this post you’ll know how the sensor works, how to diagnose a faulty sensor, wiring and control module. Only graphing the senor through a full heat cycle. A faulty sensor (or sensor circuit) will often cause cold driveability and emission problems. Using the deep socket and ratchet, remove the sensor.

A leak is a problem that creates both poor fuel efficiency and a loss of power in the vehicle.

Symptoms of a bad sensor vary, but a check engine light will be the common denominator. A bad coolant temp sensor can cause the computer to over fuel or under fuel the engine, either of which could cause stalling> Intermittent Temperature Related Engine Problems – Where To Start ! Ignition misfires can make any engine stall at idle. The second wire carries the reduced signal voltage back to the PCM. Sometimes there will be low compression in just one cylinder of the engine; and other times there will be low compression in all cylinders. Log in, Auto Repair Loans, Auto Repair Credit Card, Financing, Power Steering Repair Phoenix, Arizona | Virginia Auto Service. This test is a straight forward reference voltage check. The Positive Crankcase Ventilation (PCV) system is basically a one way passage for blow-by gases to […].

Another symptom of a problem with the coolant temperature sensor is an overheating engine. The little temp sensor is pivotal to how your motor runs, you could say it fights way above its weight. Measuring the volt drop across the sensor allows us observe the sensor work in real time. Have the replacement ready to install and you’ll keep the mess to a minimum. The information it supplies however is critical to how your vehicle runs. My more usually diagnoses starts with a visual. Again, there are many possible causes of this issue. The second wire is the signal wire and is used to carry the reduced voltage back to the PCM. But as with the idle speed control circuit, don’t replace anything until you’ve run some diagnostic tests. Faulty readings from the coolant temperature sensor can cause the engine to miscalculate the air-fuel mix in the engine. It directly effects, cooling and fueling of the engine and therefore effects how the engine performs. If the stalling started to occur shortly after your last fill-up, suspect bad gas. Fit the new sensor ad washer (if applicable) by hand first before tightening. Valve Stem Seal – Controls Valve Lubrication As Well As Oil Consumption, Timing Belt – Transfers The Rotation Of The Crankshaft To The Camshaft, Diagnosing intermittent temperature related engine problems can be a challenge; especially if they affect driveability. That way, you can drive around safely, knowing that your engine is working perfectly fine. I wrote a post about that very procedure and you can check that out in this post. Finding the cause of the problem takes experienced troubleshooting skills. If your engine stalling problems are too much for you too handle, then it might be worth looking into purchasing another vehicle.

Sometimes it’s difficult to know the right steps after an accident, but if you are dealing with a faulty car, it helps to get legal advice so you know what to do next. The PCM (Power-train Control Module) relies on this information to make various important decisions about fueling, cooling, power application and emissions. The sensor can also show faulty readings due to accumulation of oil and carbon, wear and tear. So a bad misfire may cause it to stall. Use the flat screwdriver (if needed) to remove the electrical plug connector.

If the engine now starts, you likely found the problem. One wire supplies the sensor with 5 volts, this is known as reference voltage.

COPYRIGHT © 2020 DANNYSENGINEPORTAL.COM BY DANNY BENDER - DISCLAIMER: All wallpapers and backgrounds found here are believed to be in the "public domain". Don’t sweat these details I’ll show you how to test ohms later, it’s easy! Makes sense to start your diagnoses from there, it will of course mean you’ll need to borrow or buy a code reader. If the coolant sensor reads warmer than normal, or reads hot all the time; the (PCM) will lean out the fuel mixture too much, causing the engine to stall when it is cold.

Gas that does not contain enough dispersant-detergent additives may result in; deposits building up and clogging the fuel injectors.

Set aside, don’t allow coolant to get on the contact pins. So, this kind of engine stalling problem often means the engine is not getting enough fuel and/or too much air.

Hopefully, after reading this article, you can take care of the situation without having to call someone to tow your car. Unplugging the engine coolant sensor while the car is running will likely cause the engine to stumble and run rough.

These type tools are a step above a simple code reader but still aren’t very expensive and will likely pay for them selves many times over.

Are Chevrolet Good Cars? Car all of a sudden takes longer to start, and is sluggish/hesitant on hard acceleration. Some systems use two ECT’s one for the PCM and a second for the radiator fan.