Read forums, tried disconnecting MAFS, O2 and TPI sensors. No Luck. I ran concentrated injector cleaner through gas... Worked for 2 weeks! Problem returned.. Tried same treatment... no luck this time! Thing runs like a champ when driving / accelerating. AutoZone's reader couldn't establish communications with my ECM. Tried two different Autozones... same problem.. Rotor, cap and plugs were replaced 12,000 miles ago.. The intermittent symptoms are driving me crazy! Once, I tapped on the Mass airflow sensor... Fixed it for about 4 days... What am I missing??
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2000 Mercury Villager Question: Rough Idle
Answer #1dandd July 02, 2009, 15:20Master
What is Villager doing wrong? You mentioned a lot of parts and problems with the data link but lets a start with your primary complaint. Oh, the code reader may not work because your cig lighter fuse may be burned out and this powers up many data link connectors. ( believe it or not) Let me know Happy 4th ( hopefully)
the cig lighter issue is the FUSE for the cig lighter that also powers up the Data link socket which allows you to read the codes with a code reader. Check the fuses, it may be called the courtesy fuse, cig fuse etc on the inside fuse panel. ( this fuse blows often when people recharge their cell phones or use the lighter or an I-pod)
As far as your Villager goes, it could be a sticking open EGR valve or a Vacuum leak, if, as you say, it runs fine at road speeds. Repair the code issue, because your Villager has OBD-II which is a very helpful Diagnostic system.
Replyshooby, July 02, 2009, 15:24Rookie
Thanks. It runs very rough at stops. (idling)... Like a few plugs are out ..... Plugs were replaced about 12K miles ago... Runs great when driving / accelerating.. Thanks for the info about the cig lighter... not sure about it but will check...
Visitor, May 07, 2010, 19:25
I know this is an old post, but hopefully it might help others that have had similar issues since. I had similar symptoms, thinking it was the fuel pump, water in the fuel, etc. Replace the fuel filter, cap, rotor, etc, Van was still bucking and had a rough idle, stalled, almost zero acceleration. Try cleaning in the crankshaft position sensor, located in the distributor, under a metal plate beneath the rotor. Spraying with a sensor safe cleaner. If it still persists, you need to replace the distributor. (For me, it was the distributor) Been running like a dream since. Hope this helps.
Answer #3zmassive January 02, 2012, 01:08Enthusiast
I have had this problem with the mass air flow sensor. I was actually able to take the old one apart and resolder some bad solder connections in the module and it worked fine after that. I don't recomend taking it apart yourself unless you know what you are doing.