My 2000 Ford Windstar is stalling at stops and when in reverse. Putting it in neutral at stops helps, but it seems to be getting worse and now I have to put it in neutral and give it gas to keep it running. I have put a ton of money into this van in the last year, including $1100 to a professional who couldn't fix the problem. He cleaned the fuel system, replaced the PCV, spark plugs, serpentine belt, 02 sensor, and fuel filter. In the last 2 weeks my husband and I have cleaned the MAF sensor, replaced the IAC, cleaned hoses, and are generally just stumped. We had an auto parts store hook it up to the computer and it spit out P0171, P0174, P0401, and P0443. I googled this and found something connecting P0171, P0174 and P0401 to the DPFE Sensor. We replaced that today and I thought everything was ok, because it drove perfectly for quite a while, but then we decided to let it run in park for a bit to see if it would stay running, and when I got back in to drive it around the block again it would barely stay running if my foot was on the brake. We are now completely stumped. I would greatly appreciate any ideas. Thanks!

SOURCE: 2002 chevrolet monte carlo

My car was doing the same thing. It would stall out while idling or even turning a corner. I ended up replacing a few sensors but the problem was the fuel injector pressure regulator. The check engine light never came on. It was leaking fuel through the vacuum side of the diaphragm. Disconnect the vacuum hose from the pressure regulator and if there are any traces of gasoline it needs to be replaced.

SOURCE: 2002 Ford Escape (V6) P0401 P0402 nightmare

Sounds like you have a vacuum leak, a problem with the wiring, or a bad PCM. Check wiring for pinched, chafed, pierced, or broken wires. Make sure vacuum supply is good, and not collapsing when the vehicle is running. Beyond that, a trip to the dealer may be in order.

SOURCE: I have a 2002 Ford

The "IAC" is not a sensor. IAC stands for Idle Air Control - it is an electric solenoid. These are not supposed to be "cleaned". If someone cleaned it, that is most likely your problem. You will most likely have to replace the IAC and get the engine to idle correctly so it will not stall at stops. This is a common problem for Ford 3.0L engines even if the IAC has not been cleaned.

SOURCE: 02 ford windstar p0174,p0174,p0301runs great buts idles rough.put on new plugs wires and plugs, pvc air filter,fuel filter.runs great after you give it gas but idles rough and sometimes dies, now code

did you replace to top intake gasket you removed when you replaced the back spark plugs ,and do you torque it down right

SOURCE: 1999 ford windstar 3.8L engines runs rough with code p0453

are there any codes