Your vehicles engine coolant temperature sensor (ECT) also known as coolant temperature sensor (CTS) is a small but important piece of kit. Look up the specifications for the year and model of the vehicle, then connect a gauge to the fuel system. Gas that does not contain enough dispersant-detergent additives may result in; deposits building up and clogging the fuel injectors. And some higher end models may employ more than one ECT, a V engine may have an ECT for each bank. Are Chevrolet Good Cars?
The sensor should come with thread sealer, if not use some pipe dope. Checking for simple easy wins. If you lost a ton of coolant, you’ll need to bleed the system. Idling issues can be very frustrating, but with some patient troubleshooting, you’ll have a real chance at figuring it out.
This can be a tricky problem to solve because there are several things that could be causing engine stalling. The (IAT) sensor can be damaged by backfiring of the engine. In some cases, if you find that your engine is having issues, and don’t have the legal drama that comes with it. And since resistance is like a blockage in a garden hose pipe, not all the voltage returns, it’s this reduced voltage the PCM uses to determine the coolant temperature. 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. Also, a working knowledge of your vehicle’s air, fuel, and electrical systems. This test is a straight forward reference voltage check. Causes of low compression in car engines. An (EGR) valve that fails to close at idle is another common cause of stalling.
The ultimate bad news is damage to the engine itself. Idle speed that is way too fast is one of the difficulties, and stalling is another. Some systems use two ECT’s one for the PCM and a second for the radiator fan. The engine will need to be running and the test will need to be performed through the heat cycle. https://tameson.com/solenoid-valve-types.html. The higher the coolant temperature the less resistance the sensor offers and that translates into a higher return signal voltage to the PCM. Fuel pressure should be within specifications when the key on, then drop 4 to 6 psi once the engine starts. When misfiring occurs your engine will run slower than normal. Repeated impact from uncontrolled combustion can damage the engine. Intermittent Temperature Related Engine Problems – Where To Start ! A faulty engine is already a serious matter, especially if you are out on the open road. But this test will work great for a dead sensor. I wrote a post about that very procedure and you can check that out in this post. This is the site where we share everything we’ve learned. 5 volts or close to it means all is OK here. So, A engine cooling fan failure; or a failure of the fan relay or control circuit is bad news; because it can […], Engine surging or misfiring up and down while you’re driving. If you are the rightful owner of any of the pictures/wallpapers posted here, and you do not want it to be displayed or if you require a suitable credit, then please contact us and we will immediately do whatever is needed either for the image to be removed or provide credit where it is due. But as with the idle speed control circuit, don’t replace anything until you’ve run some diagnostic tests. It’s possible to test the sensor successfully using a thermometer, a spec chart, DVOM and hot water. Also, a poor connection after servicing the air filtering unit. We do not intend to infringe any legitimate intellectual right, artistic rights or copyright. The two wire electrical connector fitted to the sensor comes from the PCM. Both of these systems are designed to change the idle when they are on; due to the air conditioning system demands on the engine.
If you notice this with your car, get your car checked out by a pro ASAP. My father ran his own auto repair business and as a kid,... We’re John and Eddie Cunningham, resident Red Seal qualified mechanics and deeply committed gear heads. Uneven engine revs and misfiring can affect drivability, but can also cause error codes to appear in your OBD-II system. Symptoms of a bad sensor vary, but a check engine light will be the common denominator. Have the replacement ready to install and you’ll keep the mess to a minimum. Although the dashboard temp gauge still works, when I unplug the ECT Sensor this makes no difference to how the car starts/idles.
Can you drive with a bad coolant sensor? (Here's how). Here’s a basic tests you can perform to help diagnose a faulty ECT sensor. Run the vehicle and check for heat from the heater. The Positive Crankcase Ventilation (PCV) system is basically a one way passage for blow-by gases to […]. The coolant temperature sensor is in the top radiator hose on a Rover 200. If the (MAP) sensor is not reading accurately, the (PCM) may add too much fuel or not enough. If the amount of black smoke coming from a car is excessive, it is best not to attempt to drive the car. If the engine now starts, you likely found the problem. So, this kind of engine stalling problem often means the engine is not getting enough fuel and/or too much air.
This won’t cause cold stalling but it can make for a rough idle once the engine warms up. Unplugging the engine coolant sensor while the car is running will likely cause the engine to stumble and run rough. As a result eliminating misfire and stalling problems. Sometimes there will be low compression in just one cylinder of the engine; and other times there will be low compression in all cylinders. The sensor operates by changing resistance proportional to how hot it’s probe end is. The faulty sensor might send a wrong signal to the computer, leading to a miscalculation in the engine timing and fuel calculation. Ignition misfires can make any engine stall at idle.
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A bad coolant temp sensor can cause the computer to over fuel or under fuel the engine, either of which could cause stalling> The sensor needs to be fully submerged in coolant fluid to be effective, and if the coolant is low, it could cause symptoms that appear similar.
It could cause issues that could result in an accident that might injure you and other drivers.
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