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Old 03-26-2011, 05:37 PM
trshmn trshmn is offline
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Default Need Help won't run right until warm

Of All the knowledgeble people on here someone must have had this problem before, when truck is cold it does'nt have the power and when you come to a stop it will chug or spit and sputter and sometimes dies, when it warms up it's fine, runs perfect, was told it was the Idle Air Control, so I cleaned it and did'nt help, bought new one and did'nt help, could someone help me figure this out, Thanks 97 2.3 5speed
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Old 03-26-2011, 06:00 PM
terryduanemiller terryduanemiller is offline
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Default Re: Need Help won't run right until warm

coolant temp sensor, and coolant temp sender sensor, your truck has both.

They are two separate and distinct sensors.

The CTS coolant temperature sensor send signals to the ECU (computer) telling the engine how hot it is or isn't allowing the computer to send the ignition signals to advance or retard the timing to allow your car to be more efficient. When it goes bad it will and can cause the following conditions:
no start when warm
no start when cold
crappy gas mileage
crappy idleing.

The Coolant Temperature Sender (usually black or brown) lights up the idiot light or the water temp gauge by sending signals to the Coolant temp relay.
Both work on the same principle that resistance to the unit varied with the temp of the water.

So re-capping one sends signals to the computer.
One sends signals to the gauge
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Old 03-26-2011, 06:59 PM
trshmn trshmn is offline
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Default Re: Need Help won't run right until warm

Thanks terryduanemiller, I'll try to find the CTS and hope that works, is there a way to test it?
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Old 03-27-2011, 05:36 PM
trshmn trshmn is offline
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Default Re: Need Help won't run right until warm

Thanks Terry, put new CTS on today , test drive was 90% better, still had a little lower idle at stop but big improvement
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Old 03-27-2011, 05:38 PM
terryduanemiller terryduanemiller is offline
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Default Re: Need Help won't run right until warm

awesome.. congrats..... might have a vacuum leak some where
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Old 03-28-2011, 04:30 PM
trshmn trshmn is offline
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Default Re: Need Help won't run right until warm

Terry, should I also replace the sender? now at start up it is fine but 10 min. in it will do same thing and then it's fine again, or is it something else? Thanks for the help
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