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1997 Ford Escort O-2 sensors

Tiny
TONYGOSSMAN
  • MEMBER
  • 1997 FORD ESCORT
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
Where are the oxygen sensors located on this model vehicle? If all goes smooth how long should it take?
Thank you
Saturday, March 22nd, 2008 AT 8:00 PM

11 Replies

Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
First of all why are you changing them? They are located in the exhaust system and are fairly easy to replace with a 7/8 wrench
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Saturday, March 22nd, 2008 AT 8:02 PM
Tiny
TONYGOSSMAN
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  • 7 POSTS
I had the timing changed, the serpentine belt replaced the water pump replaced, the idle intake valve, new plugs and wires, and the car still stalls out at every stop, and idles whenever it wants to. So I was told to replace the sensors, and of course there are 2 of them, but I don't know where. Thank you :cry:
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+1
Saturday, March 22nd, 2008 AT 8:07 PM
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
I dont think thats your problem but the o2 sensors are located in the exhaust pipes right in front of the cat converter and right behind it.
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Saturday, March 22nd, 2008 AT 8:11 PM
Tiny
TONYGOSSMAN
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  • 7 POSTS
I really don't know at this point, I had them replaced 4 years ago, and was told they go out ever 60 thousand miles or so. Thank you kindly for your information. I appreciate it, and this web site, the donations are well deserved.
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Saturday, March 22nd, 2008 AT 8:14 PM
Tiny
TONYGOSSMAN
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  • 7 POSTS
Do you have any other suggestions? Again Thank you.
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Saturday, March 22nd, 2008 AT 8:17 PM
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
There are several things to check but it sounds like you have covered most of them. I dont think I have a smoking gun for you. Without seeing vehicle at this point I dont think I can add anything more. At this stage of the game is where I would want to drive the vehicle with my scan tool watching the data as it stalls. Ive been doing this a long time and sometimes ones like this can be tricky. Like for example I could tell in one minute if the o2 sensors were ok or not with my scanner. I just dont want to lead you down the wrong road.
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Saturday, March 22nd, 2008 AT 8:26 PM
Tiny
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  • 7 POSTS
Could it be the idle speed control valve, or possibly the egr valve, or the idle air control valve connector? These we haven't replaced yet. Again Thank you :P
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Saturday, March 22nd, 2008 AT 8:34 PM
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
I thought you said you replaced the idle air control valve in the previous post. Yes thats the first thing id change is the idle air control valve. Also disconnect egr valve and see if that helps(you dont have to replace it, just unplug it, it will do the same thing)
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Saturday, March 22nd, 2008 AT 8:36 PM
Tiny
TONYGOSSMAN
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The valve yes, the connector no.
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Saturday, March 22nd, 2008 AT 8:43 PM
Tiny
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THANK YOU THANK YOU THANK YOU. WE UNPLUGGED THE EGR VALVE AND OUR PROBLEM IS NO MORE. But what does this valve do. We bought a new one, but can we wait until next weekend to put it on or should we do it right away.
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Saturday, March 22nd, 2008 AT 9:35 PM
Tiny
MASTERTECHTIM
  • MECHANIC
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Replacing the valve may not solve your problem. You could have a bad solenoid which controls the vacuum to the valve. You can replace it at your leisure. You wont do any damage driving without it. Only replace the valve if it is actually sticking open. Awesome news, glad tohave assisted
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Sunday, March 23rd, 2008 AT 11:05 AM

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