Lately, I've had a couple folks ask if my truck is okay when I start it up. If the engine is cold, it idles at 1500 rpm until it warms up. Once it's at operating temp, it idles at about 700 or 800 rpm. It's just those first few miuntes that sounds like hell. I never really noticed it until people (wife and a coworker) pointed it out to me. So i guess it's something that has developed over a long period of time.
Do these trucks have an idle air control valve? I couldn't find one listed in the Haynes manual.
Call the dealer and have them run your vin. You may have one of the many 96 and 97 trucks that were recalled for the TPS-throtle position sensor.
My 97 had to have 1 and I know a few with 96 models as well.
Call the dealer and have them run your vin. You may have one of the many 96 and 97 trucks that were recalled for the TPS-throtle position sensor.
My 97 had to have 1 and I know a few with 96 models as well.
Do what he said, but most cars do that its somewhat normal, when cold your car is in whats called open loop, this is where the engine is so cold that the O2 sensor is not working, so the ECU compensates and dumps fuel, causing a high idle until the car warms up. Once its warm the car goes into closed loop where it is using the 02 sensor as a means of fuel trim. Hope that helps.
Do what he said, but most cars do that its somewhat normal, when cold your car is in whats called open loop, this is where the engine is so cold that the O2 sensor is not working, so the ECU compensates and dumps fuel, causing a high idle until the car warms up. Once its warm the car goes into closed loop where it is using the 02 sensor as a means of fuel trim. Hope that helps.
Unfortunately, "cold" is a misleading term. i live in Florida, so the engine is at about 80-degrees when it's "cold." Now that I've been paying attention, every other car I get into and start up has a much lower idle from the get-go.
Unfortunately, "cold" is a misleading term. i live in Florida, so the engine is at about 80-degrees when it's "cold." Now that I've been paying attention, every other car I get into and start up has a much lower idle from the get-go.
That is still COLD in relation to an engine, the O2 sensor has to heat up to 600 degrees before it starts working. It is called a galvonic batterya nd produces voltage at a certain tempurature. And every car is different, try seeing if another fronty does the same in your area. Im not sure what these trucks use as far as IAC Im guessing it has a IAC motor and the ecu uses the typical TPS and pressure sensors.
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