Either you have a vacumn leak or your iac valve is dirty or needs replaced.
The service and repair manual with diagram will help you to locate and fix the problem on your own and you will get the manual from the given link http://toolsnyou.com/
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.
SOURCE: replace PCV valve 2001 taurus duratec engline
I dont think it is the PCV but its a good idea to replace the PCV at least once a year either way, and its very cheap, usually $2-$5 at autozone.
SOURCE: 1990 ford ranger 2.3L running rough at idle and while driving
Hi check all the fuse. fi the fuse are ok . remove the coil pack and reverce if the cly missifire change replace the coil if not chage replace the electronic comtrol module ok.
SOURCE: 2002 Ford Taurus SEL, DOHC Misfiring
Disconnect the battery completely, try turning the key with the battery disconnected. Put the battery back together. The check engine light should be off now..
348 views
Usually answered in minutes!
×