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Windstar rough idle when van comes to stop but runs fine driving just changed plugs & wires

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  • Ford Master
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Throttle position sensor

Posted on Dec 02, 2012

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6ya6ya
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Posted on Jan 02, 2017

emissionwiz
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SOURCE: ROugh idle

there are 2 things that usually cause this, one is a dirty intake idle control valve and the other is hard engine mounts, I would say that both most likely apply to your car. try cleaning the intake with the following procedure from Ford.
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.

Posted on Feb 18, 2009

  • 2 Answers

SOURCE: 98 Mercury Tracer idle drops at a dead stop and

Check your PCV valve tube (to the right side of the top of the engine. When mine did this, the tubing for the PCV valve had dry rotted and cracked, thus losing pressure and stalled the car. Ford parts department has these at any dealership if that is the problem.

Posted on Jun 20, 2009

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SOURCE: 2002 kia sedona 3.5l has rough idle replaced plugs wires and coil

this vehicle has coil packs for the ignition correct? have you ran the engine at night with all surrounding lights outs so its really dark. spray a mist of water on the coil packs and spark plug wires to see if you have spark/voltage leaks jumping out from them. sometimes the tiny sparks will be so fine and skinny you can barely see them so it needs to be dark. hope this helps your trouble shooting. a coil pack could have such a fine crack for the voltage to leak from that you cant see it.

Posted on Jun 13, 2009

  • 3600 Answers

SOURCE: 2001 ford escort, rough idle, runs smooth while

Your IAC may be defective, first check the canister purge valve by removing the large hose off the charcoal canster and plugging the hose with a bolt or something you can fit into it, then try it also check PCV valve and see if it's bad. there are more things to check like fuel filter fuel pump and or fuel strainer if fuel tank but would need to have more information to help.

Posted on Aug 28, 2009

  • 115 Answers

SOURCE: car idles rough in park also runs rough in overdrive

Sometimes a rough idle like that is a fuel filter. As you've already done the plugs and wires the fuel filter would be my next bet.

Posted on Mar 15, 2010

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