'96 3.8L Misfire / Engine Sputters when Fan Turns On
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Ford WindstarIntroduced in the mid-1990s, the front-wheel-drive Ford Windstar minivan campaigned with an emphasis on, and reputation for, safety. And in the hotly contested family minivan market of the time, that was an especially solid piece of ground to be on. As long as buyers didn't need to haul adults in back on a regular basis, the Windstar served a family's needs just fine.
'96 3.8L Misfire / Engine Sputters when Fan Turns On
Hoping someone here can help me out with my '96 Windstar 3.8L.
It just started happening a couple days ago.
With the A/C on, when the car is idling, the engine will sputter and drop below 750rpms when the fan engages. Without the A/C on, the fan doesn't turn on so I don't have this problem.
I disconnected both fans and the problem goes away. With a volt meter, I was able to see when it was trying to engage the fans. No sputtering. Plug the fans back in and right before they start the engine shakes and sputters.
I also got a P0302 - cyl 2 misfire code. Checked the battery with a volt meter and it was dropping 1 volt every time the fan was engaging. Replaced the battery and fuel filter today and the problem still exists.
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1998 Ford Windstar GL 3.8L 253,100 miles
2005 Toyota Prius Package 6 1.5L 135,000 miles
2006 Toyota Sienna LE 3.3L 36,000 miles
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You may want to consider getting the alternator and voltage regulator checked. I think that some stores such as AutoZone and AdvancedAuto does this service for free.
Missfire in cyl #2? Check your coil pack, your wire to plug two for resistance. The gap of the plug.
Also check your grounds.
There is a post here that lists a number of grounds.
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'96 3.8L Misfire / Engine Sputters when Fan Turns On 
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