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

286,465

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.

21,730

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

10

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☹️

1 people found this helpful.

Your Answer

Windstar

Looking for a Used Windstar in your area?

CarGurus has 361 nationwide Windstar listings and the tools to find you a great deal.

ZIP:

Ford Windstar Experts

  • #1
    JohnBarJB
    Reputation
    610
  • #2
    T_S_T
    Reputation
    470
  • #3
    Tom Demyan
    Reputation
    440
View All

Related Models For Sale

Used Honda Odyssey
300 Great Deals out of 36,584 listings starting at $1,400
Used Toyota Sienna
215 Great Deals out of 20,577 listings starting at $799
Used Chrysler Town & Country
193 Great Deals out of 12,872 listings starting at $899
Used Dodge Caravan
427 listings
Used Dodge Grand Caravan
215 Great Deals out of 29,615 listings starting at $1,200
Used Ford F-150
2,344 Great Deals out of 215,477 listings starting at $1,300
Used Ford Ranger
116 Great Deals out of 4,571 listings starting at $1,895
Used Chevrolet Silverado 1500
1,781 Great Deals out of 149,286 listings starting at $1,495
Used Toyota Camry
761 Great Deals out of 70,900 listings starting at $1,200
Used Ford Expedition
427 Great Deals out of 20,900 listings starting at $1,000
Used Chevrolet Astro
200 listings starting at $1,688
Used Honda Accord
424 Great Deals out of 101,059 listings starting at $1,200
Used Chevrolet Express Cargo
72 Great Deals out of 7,062 listings starting at $1,995

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.