can a bad coolant temp sensor cause rough idle

Can A Bad Coolant Temp Sensor Cause Rough Idle

I had some bad head gasket leaks, oil in the coolant, coolant loss, oil dripping on exhaust manifold, rough idle, stalling. There was a coolant leak that I did not notice. I would recommend, have the engine at idle, normal temp and with a volt meter, set on DC 1 volt range, sample the two or four O2 Sensor …

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Rough Idle Causes And How To Fix Them - Weston

· A code reader can be used to identify the problem, and a digital multimeter may help to determine whether the sensor has failed and needs Leaks in these hoses and in other parts of the vacuum system can be another cause of a rough idle, often because of a lean fuel/air mixture from excess air entering the system. These leaks can result from a variety of causes, some of which are:

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Can a bad coolant temp sensor cause high idle?

· Keeping this in consideration, can a bad coolant temp sensor cause rough idle? A faulty coolant sensor that always reads cold may cause the fuel control system to run rich, pollute and waste fuel. A coolant sensor that always reads hot may cause cold driveability problems such as stalling, hesitation and rough idle. This also affects engine performance and fuel economy. Also, …

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Can A Bad Coolant Temp Sensor Cause Rough Idle

Low coolant level or a bad coolant temperature sensor can also cause an erratic idle -- they can confuse the ECU so it won't know whether the engine is warm or still cold. I replaced the coolant temperature sensor this morning and checked the vag. Sounds like the right path to follow. Oil pressure.

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Can a bad coolant temp sensor cause misfire?

A coolant sensor that always reads hot may cause cold driveability problems such as stalling, hesitation and rough idle. This also affects engine performance and fuel economy. Subsequently, question is, can you drive with a bad coolant sensor? Anyone with specific knowledge weigh in. Usually the Coolant Temp Sensor is used for the

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Coolant Temperature Sensor parameters (rough idle when ...

· Coolant sensor works on NTC principles. Technically speaking, you can remove the sensor, take it to your kitchen and heat it on your pot of water. Then compare against published values (Ohms vs temp). However, if your car has more than 100K miles (160K kilometers), chances are the temp sensor is bad. Early model 1996-98: temp sensor sits in the ...

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8 Symptoms of a Bad Coolant Temperature Sensor ...

· This article will discuss the most common symptoms of a bad coolant temperature sensor, location, replacement cost, and how to diagnose it. 8 Symptoms of a Bad Coolant Temperature Sensor. Check Engine Light; Poor Mileage; Electrical cooling fans not coming on; Black smoke from the exhaust pipe; Difficult starting condition; Engine overheats; Rough idle

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Can an engine run too cool? –

· Can a bad coolant temp sensor cause rough idle? How do you trick a temperature sensor? How do you check coolant temp gauge? Is it normal for car temperature gauge to fluctuate? How do you know if your thermostat is stuck open? Why is my car temperature going up and down? What does it mean when your temperature gauge fluctuates? How do I know if my engine is …

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Readers ask: Engine Stalls At Idle When Warm? - Engine

11 Can a bad coolant temp sensor cause rough idle? 12 How do you smooth out rough idle? 13 Why does my car shake after I changed the spark plugs? What causes rough idle when warm? A Wonky fuel pressure regulator can cause rough idle when warm. Once warm, a bad fuel pressure regulator can cause a rough idle by leaning out the mixture due to low fuel pressure. What causes an engine to …

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Symptoms of a Bad or Failing Coolant Temperature Switch ...

· If the coolant temperature sensor goes bad it can send a false signal to the computer and throw off the fuel and timing calculations. It is not uncommon for the coolant temperature sensor to fail and send a permanently cold signal to the computer. This will cause the computer to think the engine is cold, even when it is not, and as a result will use more fuel than necessary. This will reduce ...

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How Do You Know If Your Temp Sensor Is Bad?

8 Can a bad coolant temp sensor cause rough idle? 9 How do you test a coolant temperature sensor with a multimeter? 10 How much is a coolant sensor? can you drive with a bad temperature sensor? Anyone with specific knowledge weigh in. Usually the Coolant Temp Sensor is used for the gauge for fuel trims for cold start enrichment, and fan control. Since the Thermostat and water pump …

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TROUBLESHOOTING | TBI

Next cause for high idle is a bad coolant temp sensor in the intake by the thermostat housing as idle speed is temp based. Next, you can have a bad IAC (idle air control) valve on the side of the throttle body. Thing isn’t real cheap so we save changing it until last. you can remove it can clean with WATER ONLY. NO CARB CLEANER and some penetrating oil and work it in and out a bit and see if ...

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Can a bad coolant temperature sensor cause a rough idle ...

If you unplug the coolant temperature sensor the PCM will see the lack of signal as a extremely low coolant temp. The PCM will set an injection rate that will be excessively rich. The coolant temperature sensor acts as a choke on an engine and adjusts fuel injection rate from rich when the engine is cold to lean for a warm engine. If you unplug the sensor when the engine is cold the engine may run …

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What Does A Engine Coolant Temperature Sensor Do? - Engine

Can I drive my car with a bad coolant temperature sensor? Faulty readings from the coolant temperature sensor can cause your car’s engine to miscalculate the fuel to air mixture within the the amount of black smoke emitting from your car is excessive, then you should not drive your car and you should tow your vehicle to a mechanic.

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Symptoms of a bad/failing engine coolant temperature sensor?

· According to thefactory Service manual the engine coolat temperature sensor is something that, when bad, can cause a rough idle, misfire, and general porr running of the engine. Does the ECT sensor send information to the ECM only? or does it also send information to the guage? Can the ECT work sporadically? or is it an all or nothing kind of deal? School me on this sensor!!! I …

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