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What is your question?
during cold start the 3.9l engine doesnt idle up, and the truck will die easily even after warming up, idles rough at stop signs, changed throttle position sensor, and thermostat.
What makes this problem better or worse?
worse when engine is cold
1 Reply
A professional scan test may reveal a problem exists related to the coolant temperature sensor or it's circuit .. That is what's responsible for fuel adjustment according to ambient temperature .. There is no automatic choke..