Accelerating on its own, P0171 P0174 jumping tach meter, accelerates when steering turned

5

Asked by Feb 11, 2016 at 11:44 PM about the 2001 Ford Windstar LX

Question type: Maintenance & Repair

2001 Ford Windstar, 206K
Has always been a great car, but the last month or so, it has went crazy. It
accelerates on its own, jumps forward at lights & stop signs and I have to
keep brake pressed so it doesn't take off on me...It also is jumping from
500-1K on the tach and sounds like it is going to stall (when its not revving
up to 3K) so, I end up giving it some gas at times to keep from stalling and
holding brake at same time so it doesn't take off.

When I turn the steering wheel while setting idle, the car revs up to 2-2.5K.

I have replaced the spark plugs, Cleaned the EGR Valve, replaced the
throttle sensor, replaced the fuel filter, replaced the Idle control valve,
CLEANED the MAF, changed the air filter...still with no luck and scared to
keep spending money on a 2001 Windstar that is basically not worth much,
but I can't afford a new car, so I have almost no choice but keep nickeling
and diming me :(  Any suggestions would be greatly appreciated. ( I have
also looked for Vacuum leaks, and cant seem to find any, but going to
recheck that and also read about replacing the PCV Valve hose) Anything
that I am possibly missing as to why my car accelerates on its own? I shift it
in gear and it literally takes off! Also I have a motor mount that needs to be
replaced also. And my brakes also keep going out...they just completely go!
Brake goes to the floor and ZERO brakes, I keep adding fluid, and it keeps
disappearing! Every 4-5 days, I have to add 1/2 bottle of brake fluid. Its not
leaking (I park on cement) and I have checked around all the tires, no
leaks.. I have read that fluid is possibly backing up in the brake booster? I'm
a single mom of 2 little ones that feels incredibly unsafe, but like I said, it's
my only means of transportation. Any help would be appreciated.

3 Answers

269,995

P0171 and P0174 are classic codes for a vacuum leak. Which means unmetered air after the MAF is being detected by the system. Check all your rubber hoses around the intake and PCV. You can spray some carb cleaner around those areas while the engine is running and if the idle goes up, there is your leak. Also a leaky gasket on the upper manifold can do the same thing. You can have your mechanic perform a "smoke test" to pinpoint the leak if you can't find it on your own.

20,790

Sounds like you have a bad brake booster check valve also a bad master cylinder.

Hey Rami I have a 2002 Ford Windstar and the same thing is happening to me change the idle control valve , and the throttle sensor a hose and the fuel pump from the tank just took it back to the mechanic that said it was the pump. The van has been a great car 12 years☹️

Your Answer

Windstar

Looking for a Used Windstar in your area?

CarGurus has 529 nationwide Windstar listings starting at $3,995.

ZIP:

Ford Windstar Experts

  • #1
    JohnBarJB
    Reputation
    590
  • #2
    T_S_T
    Reputation
    470
  • #3
    Tom Demyan
    Reputation
    420
View All

Related Models For Sale

Used Honda Odyssey
380 Great Deals out of 29,492 listings starting at $1,642
Used Ford F-150
3,338 Great Deals out of 225,653 listings starting at $1,250
Used Chrysler Town & Country
301 Great Deals out of 13,396 listings starting at $1,999
Used Toyota Sienna
442 Great Deals out of 19,696 listings starting at $1,995
Used Ford Escape
1,332 Great Deals out of 98,643 listings starting at $1,000
Used Ford Mustang
450 Great Deals out of 42,576 listings starting at $1,488
Used Ford Focus
694 Great Deals out of 64,737 listings starting at $999
Used Ford Explorer
1,198 Great Deals out of 64,657 listings starting at $1,499
Used Ford Taurus
217 Great Deals out of 15,330 listings starting at $1,295
Used Ford Expedition
455 Great Deals out of 17,715 listings starting at $1,000
Used Dodge Caravan
528 listings starting at $2,295
Used Dodge Grand Caravan
371 Great Deals out of 33,859 listings starting at $1,499
Used Chevrolet Tahoe
903 Great Deals out of 39,853 listings starting at $1,990

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.