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My truck will not idle, it idles high then low, before shutting down. This problem started all of the sudden after I finished installing a water pump. I tried driving it but I couldn't keep it running. Please help, Keith Moore Douglas GA
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Check for any disconnected hoses that may be causing a vacuum leak resulting in a high idle. Make sure coolant level in radiator is not low which can also attribute to a high idle.
did u use fuel stabalizer? if not the gas can turn into a varsale like substance that can clog fuel filter and reck injector seal's, also check the disributor cap and rotor for condensation, this can happen over a period of sitting
Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
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