truck will turn over and run but hae to keep on gas to keep going how could Ifix on 1999 Dodge Ram 2500

need to know how I could fix my truck the truck starts up u have to keep your foot on the gas to keep it goig it seem like their is no idle >>? its weird need help plz

by in Janesville, WI on May 13, 2014
2 answers
ANSWER by on May 13, 2014
The IAC valve (intake air control valve) mounted at the rear of the throttle body has likely failed, or the passage behind it is dirty with soot. At idle, the engine gets air only from the pcm controlled IAC valve. If you press on the throttle, you open the throttle plate and allow air to enter past the throttle plate. Remove the valve and clean the passage then re-install valve. If the idle doesn't improve, you will need a new IAC valve.
ANSWER by on May 14, 2014
agree with #1

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