SOURCE: engine first runs good, but progressive chug/misfire.
Check for vaccum leak, if not check or replace mass air flow sencor.
SOURCE: 1996 Mercury Villager with idle problems
The knock sensor is never bad and it costs @ $500 to change. Have to remove top half of engine. I suspect you need to clean the optical cam sensor under the distributor cap or change the oxygen sensor. Here is a site where we help each other with Villager Qust problems.
Look in files for answers.
http://autos.groups.yahoo.com/group/villagerquest/
SOURCE: 1996 Mercury Villager with idle problems
Make sure there is no vacuumm leak.
Check and let me know.Then i would be able to tell you all the steps for troubleshooting.
Thanks.
SOURCE: 1997 mercury villager runs great when gets hot
If it's also useing coolant, it may have a bad head, or gasket.
SOURCE: 1993 Mercury Villager GS: During
clean teh heated wires in the MAF sensor with spray carb cleaner. Good. do not touch.
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