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O/T: '92 Caravan charge temperature sensor
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Posted by MeAnthony on December 19, 2006 at 17:47:54 from (152.163.100.74):
The patient: '92 Dodge Caravan 3.3 v6 auto
The symptoms: hard starting; won't stay running Tonight, on a cold start, it fired up on the 3rd try(didn't fire at all on first 2). Idled smoothly for about 5 minutes, then started running rough. This occurs as a slight miss and gradually worsens until the engine quits. Running time can be prolonged by moderately revving the engine. When it does quit, it will restart but still runs very poorly, and only for a few seconds. We put this engine in this summer(engine is from a '91 New Yorker). Problems did not arise until fall, when temperatures dropped. I noticed tonight that there's a sensor on the intake that's not plugged in. I can not find a plug in the wiring for this sensor. By the Haynes manual, this is the charge temperature sensor. What is the function of this? Does it read the temperature of the air entering the intake for the computer to adjust richness? My best guess is that it is loading up with fuel. Does this make sense to y'all? Wouldn't an overfueling problem be less pronounced at cold start(when fuel needs to be richer) and get worse as the engine warms up(when fuel need to be leaner)? Or am I barking up the wrong tree? Can someone explain the function of this sensor, just to make sure I am going in the right direction? Suggestions and opinions are appreciated; I thank you for your time. Happy Holidays! Anthony
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