Question about 1999 Dodge Caravan

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In cold temps below 25deg. when engine is first started it acts like the engine is chocking out and won't stay running. when engine warms up it runs fine. 3.3 V-6. is they a sensor that is causing this?

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  • Dodge Master
  • 6,674 Answers

The coolant temperature sensor located near thermostat housing can cause those symptoms. If price at autoparts store seems high, try dealer, sometimes they are cheaper.

Posted on Jan 30, 2010

Testimonial: "Thanks for your reply. I'll give that a try and replace the temp sensor. Thanks."

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It means you have a bad coolant temp sensor. This part act like a choke would on old cars, and tells the ECU when the fuel mix needs to be richer because engine is cold. They can fail in different ways making the car run poorly when first started cold, or run poorly as the engine warms up because it tells the ECU enegine is still cold. Replace sensor, but note there are two on most cars noe. One with a single wire speaks to dash gauge--one with two wires speaks to ECU.

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Won t stay running when first started. runs fine once its warmed up


This sounds like the temp sending unit for the ecm is bad. There are 2 temp sensors, 1 for the light/gauge and 1 for the ecm. The sensor sends a signal to the ecm to tell it engine temp, the ecm them adjusts fuel mixture for cold or warm engine.This works much the same way as the choke does on a carb for cold starts

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Acts like the choke is stuck closed it won't stay started and runs ruff until engine warms up then its fine. What do i do?


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Try to start run for a second if you press the gas it will stay on until you get off the gas


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When the motor is cold and the outside temperature is below 70 the car will not stay running. Will die with in 30 seconds or so of starting, then you have to wait a minute or two befor the car will start...


Are there any service engine soon lights on associated with this problem?

Possible CTS (Coolant Temperature Sensor) or another sensor giving faulty data for the cool air temperature.

Check spark and gas delivery when cool, below 70 deg. If the spark is not being delivered or the fuel injectors are not delivering fuel at this temperature, it will explain why it doesn't run right until it is warmed up.

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2.0d x-type 2005 Est. Starting problems when engine is warm


Ok, time for car school. The vehicle is operated by the computer, every electrical concept that is. When the engine is cold, it starts fine because the computer has placed it in "cold start mode", putting more fuel into the engine than normally would until Once the engine is warmed up, a temperature sending unit or temp sensor tells the computer to change to normal run mode. IF said temp sensor is faulty and is not telling the computer to make said change, it stays in cold start mode, still dumping excess fuel in the engine that is now not required, cause it's warmed up. Like keeping the choke closed on older vehicles. Now I think you can answer your own question, when this no start action is happening after warm up and it always starts fine when cold, what's the first thing you check ? Right, the unsuspected temp sensor. Change that and no more start problem. Have a wonderful day. Glad I could be of service.

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Youi have a thermostat that is stuck in the open position; you are going to need to replace the thermostat.

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