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Ford WindstarIntroduced in the mid-1990s, the front-wheel-drive Ford Windstar minivan campaigned with an emphasis on, and reputation for, safety. And in the hotly contested family minivan market of the time, that was an especially solid piece of ground to be on. As long as buyers didn't need to haul adults in back on a regular basis, the Windstar served a family's needs just fine.
hmmm, my van has good days and bad days with the stalling issue. I've noticed that the days it stalls are the days it also has less power. (Weak idle has weak 'punch' when accelerating) The days it doesn't stall, it doesn't hesitate and it has better power throughout the power curve.
The O2 sensors are original, but I really don't feel like spending money... What are my chances that they still work right at 251,000 miles? How many sensors are there for O2 and how can I check the EGR system? What's the cheapest price on decent O2 sensors? My guess is motorcraft all the way?
You have 4 O2 sensors. One before and one after each of your two cats. THey are about $50- $60 EACH. There is a testing proceedure for them with a voltmeter, (not that I know what it is)
I just replaced one of mine, I bought a less expensive O2 sensor socket to remove it, because a better brand was not locally available. It started to round the corners of teh sensor. Fortunately I was able to get a 3/4 inch box wrench on it after I cut the wires and connector off. The connector would not fit through the 3/4 in box. So once I cut the wires I was committed to getting it out. FOrtunatley it worked for me. I would recommend that one purchase a better QUALITY O2 sensor socket if you can't get at it with a wrench. A regular deep socket will not reach even if you cut the wires off right at the sensor.
All of the following items will cause a HEGO code: O2 Sensor code
• Check engine oil for fuel contamination.
• Check fuel pressure.
• Check fuel systems ability to hold pressure for 60 seconds.
• Engines general condition.
• Fuel injectors (leaky, stuck, dirty).
• Secondary Air Injection (AIR) system.
• PCV / Hose stuck or blocked.
• Vacuum leaks.
• Fuel Injector O-Rings.
• CANP.
• MAP/MAF sensor.
• Ignition Coil Failure.
• Wiring harness general condition.
• Old HEGO sensors (should be replaced every 60,000 miles).
OK! I just verified by looking under my Windstar There are 4 O2 sensors on a Windstar Exhaust.
1 is really hidden.
LOL... I was going to go out and take a picture, only to discover that we can't post pics on this forum.
At any rate Should one pull codes this is an example of one that may be obtained.
Here are the codes I got. P0153 O2 sensor CKT Slow Response (Bank2 Sensor 1)
Bank1 is is the side of the engine that has cylinder number one. IT is the side between the engine and the firewall.
Bank2 is closer to the radiator.
Sensor 1 is before the cat (in the exhaust manifold), sensor2 is after the cat.
Of course, you can post pics....next time, save your pics on your computer in any of the accepted formats (gif, jpeg, etc.) then use attachment option (from the tool bar of message window; it's shaped like a paper clip) to upload 'em.
Quote:
Originally Posted by BroncoJoe19
LOL... I was going to go out and take a picture, only to discover that we can't post pics on this forum.
At any rate Should one pull codes this is an example of one that may be obtained.
Here are the codes I got. P0153 O2 sensor CKT Slow Response (Bank2 Sensor 1)
Bank1 is is the side of the engine that has cylinder number one. IT is the side between the engine and the firewall.
Bank2 is closer to the radiator.
Sensor 1 is before the cat (in the exhaust manifold), sensor2 is after the cat.
I was gonna say that I've seen at least 3 O2 sensors on that van. I will be taking the van to my buddy's race mechanic for some insight on the stalling issue... hopefully he can help figure it out.
I just don't want to spend $200 to find that my sensors were fine to begin with.
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1998 Ford Windstar GL 3.8L 253,100 miles
2005 Toyota Prius Package 6 1.5L 135,000 miles
2006 Toyota Sienna LE 3.3L 36,000 miles
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Of course, you can post pics....next time, save your pics on your computer in any of the accepted formats (gif, jpeg, etc.) then use attachment option (from the tool bar of message window; it's shaped like a paper clip) to upload 'em. 
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