Mercury Villager 99 Catalytic Converter

1999 MERCURY VILLAGER
140 MILES • 6 CYL • FWD • AUTOMATIC
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JONANGEL
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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
Jan 21, 2011 at 6:17 PM
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DOCFIXIT
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Two CATS required one for each engine bank. What is code in P0xxx format
Jan 21, 2011 at 6:24 PM
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JONANGEL
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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
Jan 21, 2011 at 7:33 PM
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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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Jan 21, 2011 at 8:41 PM
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JONANGEL
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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.
Jan 22, 2011 at 8:00 PM
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DOCFIXIT
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all your looking for isHIGH OHMS cold lowering as it warms
Jan 24, 2011 at 2:55 PM
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JONANGEL
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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!
Jan 25, 2011 at 9:52 PM
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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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Jan 27, 2011 at 6:11 PM