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Mercury Villager 99 Catalytic Converter

Tiny
JONANGEL
  • MEMBER
  • 1999 MERCURY VILLAGER
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 140 MILES
My van has been stalling when it heats up. I have changed everything the diagnostic test tells me by its code and they still come out. The engine turns on nice and smooth. When it warms up, it stalls driving at 30mph. I have changed the spark plugs, cable, rotor, distributor, air filter etc and it still stalls like its choking. Even without driving, only when it warms up it starts choking. My last thought would be the catalytic converter. I checked under and found 2 of them. Why does it have 2 of them? Can I eliminate one and just place one? Is it 2 because of CA state emission law? I live in the sate of MD. Thanks- J.B
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Friday, January 21st, 2011 AT 6:17 PM

7 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Two CATS required one for each engine bank. What is code in P0xxx format
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Friday, January 21st, 2011 AT 6:24 PM
Tiny
JONANGEL
  • MEMBER
  • 4 POSTS
P0325, Knock Sensor(I changed the Knock Sensor)P0325p/d, P0443, EVAP Canister Purge Volume Control Valve Citcuit fault(CA), P0443p/d and P0125p/d. When it warms up the P0125 goes. Thanks
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Friday, January 21st, 2011 AT 7:33 PM
Tiny
DOCFIXIT
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Does engine temp reach normal operating range? If yes need OHM meter to test ECT and IAT see diagram measure across terminals at 68 deg read 2500 ohms on both and at 194deg read 200 ohms.
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Friday, January 21st, 2011 AT 8:41 PM
Tiny
JONANGEL
  • MEMBER
  • 4 POSTS
Ok, Sounds like a plan. I will buy an ohn meter today and test it. Question, when you as does engine temp reach operating range, is that where it marks C********H like in the middle or in betwen the middle and cold? Also, when measuring it on 68 deg and 194 deg how do I know its under that deg to test it with the ohm meter? Thanks.
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Saturday, January 22nd, 2011 AT 8:00 PM
Tiny
DOCFIXIT
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  • 18,828 POSTS
All your looking for isHIGH OHMS cold lowering as it warms
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Monday, January 24th, 2011 AT 2:55 PM
Tiny
JONANGEL
  • MEMBER
  • 4 POSTS
OK, first I pulled of the harness for the ECT sensor and the radiator fan went on going fast. I placed the harness back on the ECT sensor and the fan still kept going fast. I remembered I had boought long ago an ECT sensor but never installed. It. I insatlled it without checking the ohms, dont know if I did right. But, after installing the new ECT I had, the check engine light went with no reading codes at all. I checked the reading again with no check engine light on and it would come out P0443. The exhaust still sounded like it was choking. Should I still check the ohms even if I placed another ECT sensor? The p0443, Evaporative Emission Control System Purge Control Valve Circuit Malfunction might be the problem? What should I do? Thanks!
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Tuesday, January 25th, 2011 AT 9:52 PM
Tiny
DOCFIXIT
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Find purge canister on right side engine. Unplug termonal on Pin 5 key on measuer voltage 10, or higher. Next key off measure ohms from pin 38 to ground. See diagram
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Thursday, January 27th, 2011 AT 6:11 PM

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