Post subject: 2001 Windstar with P0401 and unable to reach 4000 rpm
Posted: Mon Jul 27, 2009 5:28 am
Joined: Mon Jul 27, 2009 5:02 am Posts: 1
My wife drives an automatic 2001 Windstar Sport with 85,000 km. We've encountered the dreaded P0401 code and from my research here and elsewhere it appears I need to check the EGR with a vacuum test, inspect EGR valve and conntecting hoses, and a possiblr voltage test of the DPFE to troubleshoot. Before I do so (as I am a novice) does the following info change or support the DPFE/EGR path...
- No real change in performance is noticed. - After clearing the code my wife was able to take the highway 20 minutes to work with no problem. On returning home the code reappeared. - the vehicle has no issues up hill or with acceleration. - Unable to reach 4000 RPM in neutral as the vehicle appears to be "choking'/sputtering. - only ever had fully synthetic oil in it (mostly Mobil 5W30) - regular maintenance on schedule for first 7 years (under extended warranty) with our local Ford dealership - last 2 oil changes not done on schedule (the first a few weeks late, the most recent 2 months late - Just done a few days ago) - regular unleaded fuel has been used the last several years (prior to that premium unleaded was used most of the time)
Thanks for any further info!
1984 Topaz GL 1994 Escort (still on the road, like new) 1994 Ranger XLT - passed on to my older brother 1999 Escort ZX2 - totaled/write off 2001 Windstar Sport - Good service, low km as above 2006 F150 - was supposed to be a Mazda 3!
Post subject: Re: 2001 Windstar with P0401 and unable to reach 4000 rpm
Posted: Mon Jul 27, 2009 9:05 am
Joined: Tue Jun 17, 2008 7:06 pm Posts: 714 Location: Atlanta GA
On this model 99% of the time the problem is the DPFE and or the EGR passages in the intake are clogged. It is best to do both, and the DPFE should come from ford the aftermarkets are no good. The not reving up in neutral over 4,000 sounds like the rev limiter kicking in so you do not over rev and blow the motor.
Post subject: Re: 2001 Windstar with P0401 and unable to reach 4000 rpm
Posted: Mon Jul 27, 2009 7:59 pm
Joined: Sat Oct 20, 2007 6:50 pm Posts: 46
he's right, it's the rev limiter, furthermore, you should not be attempting to rev it that high in neutral, ever. Go to Ford, buy a dpfe, put it on, problem solved. If the runner port passages were plugged it would misfire on 1 cylinder or more when the egr system was enabled.
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