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Old 11-02-2013, 07:59   #1 (permalink)
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2002 Windstar Jolting when driving

Yesterday my Windstar shut off when I was making a left turn into a driveway. Started right back up and hasn't done it since. However as I was driving into work this morning the van jolted about 4 or 5 times like it was dropping out of gear or momentarily shutting off. Every now and then it will idle a bit rough at a stop sign or red light but if you rev it up it stops and drives normally. This is the first time it has ever shut off or jolted when driving. The drive to work is about 55 KM. Anyone have any ideas. The van is a V6 3.8L with about 240000KM on it.
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Old 11-02-2013, 08:36   #2 (permalink)
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Re: 2002 Windstar Jolting when driving

See what codes are in the system.
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Old 11-03-2013, 08:41   #3 (permalink)
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Re: 2002 Windstar Jolting when driving

Do what Bert says, and consider this: when was the last time the fuel filter was changed?
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Old 11-04-2013, 06:44   #4 (permalink)
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Re: 2002 Windstar Jolting when driving

Checked the codes this morning. They are 171 and 174. These codes have been there for about a year now. The van has run fine all this time and never shut off. The fuel filter did come to mind and I will change it out the first chance I get. My other thought was an electrical issue. Possible? If so where do you start. I should mention that when the van jolts there is no dimming of dash lights and no lights come on in the cluster indicating it has shut off momentarily. I drove the van about 50KM on way yesterday and it jolted twice, on the return trip it didnt do it at all. this morning it did it 3 times on the way to work. So hard to diagnose something so inconsistant.
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Old 11-04-2013, 09:01   #5 (permalink)
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Re: 2002 Windstar Jolting when driving

This might help ,

2000 Ford Windstar (Codes 171 and 174)
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Old 11-06-2013, 07:00   #6 (permalink)
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Re: 2002 Windstar Jolting when driving

Replaced the fuel filter last night and thought I had the problem solved. However once the van cooled down and I went back out the problem returned for about the first 5 minutes of drive time and then didnt happen again. This was also the case when I left for work this morning. I started the van and allowed it to warm up for about 5 minutes and it idled fine. In the first 5 minutes of drive time it jolted two or three times and never did it again after that. My drive to work usually takes about 45 minutes or more depending on traffic. None of the drive is highway and I encounter multiple red lights along the way. Van idles at the lights without a problem and accelerates no problem. Im at a loss now, the fuel filter was badly plugged and the problem seemed like a fuel delivery issue.
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Old 11-07-2013, 18:19   #7 (permalink)
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Re: 2002 Windstar Jolting when driving

Can you get fuel rail pressure? Vacuum will help, too.
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Old 12-24-2013, 13:41   #8 (permalink)
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Don't forget the coil pack

I'd like to add to the P0171/P0174 issue. I too got these codes, along with P0303. Rough running under acceleration, but not at idle. Did all the isolator bolt gaskets, cleaned MAF, checked EGR, checked plugs, looked for vacuum leaks. Nothing helped until I removed the coil for inspection. Others have said cracks develop in the epoxy on the underside of the coil, but I found cracks had appeared at the base of the coil towers. I initially just cleaned the coil thoroughly and the engine now runs perfectly. Obviously this will need to be replaced, but just wanted to add my experience.

Thanks to all on this sight for the help.

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Old 12-24-2013, 19:06   #9 (permalink)
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Re: 2002 Windstar Jolting when driving

Thanks for the input. Merry Christmas!
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