Question about 1997 Ford Expedition

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I think the catylitic converter is cloged and when i use the 4x4 it sounds like the trans fer case is sliping ive change the o2 censor already

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  • Ford Master
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Slacken exhaust from manifold and try it like that and see what happens

Posted on Mar 26, 2011

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On a Jaguar 2001 S Type I have a code 420 and 430 which indicates low efficiency threshold on the catalytic converter. What can I do to increase the efficiency?


You would have to replace the catylitic converter(s) if efficiency is low. In some cases the rear o2 sensors become lazy and can set these codes. You can replace these sensors and see if the codes will go away. In most cases, when converter replacement is required, these sensors are recommended. I would change the rear o2 sensor(s) and hope for the best. Converters are very expensive

May 01, 2015 | 2001 Jaguar S-Type

1 Answer

What place is the bank 1 censor 3 on a s10 98 located


  • Bank 1 is referring to the side of the motor with cylinder 1, usually the driver side. And it would be the 3rd sensor back. Its probably not dual exhaust so its just referring to the rear o2 sensor located after the catylitic converter. Hope this helps.

Sep 03, 2014 | Cars & Trucks

1 Answer

How do i figure out my problen


thats what it sounds like but the shaking may be one of your motor mounts check your o2 sensors too

Aug 13, 2012 | Jeep Cars & Trucks

1 Answer

Where are all three o2 censors in a 1999 s10 blazer. 4 door V6 engine and 4x4


The upstream O2 sensors will be before the catalytic converter just down from where the exhaust pipe(s) attache to the exhaust manifold. The downstream O2 will be right after the catalytic converter. Once you crawl under the vehicle they will be pretty obvious where they are in the exhaust pipe.

Oct 23, 2010 | 1999 Chevrolet Blazer

2 Answers

Have an 03 silverado needs new o2 censor where are the sensors located? somebody told me there are 7 sensors is this right?


O2 CENSOR IS LOCATED ON THE EXHAUST MANIFOLD. THAY HARD TO REACH AND HARD TO GET OFF SOMETIMES. I HAVE A PRO CHANGE MINE. AND YOU SHOULD PROBABLY HAVE THEM CHECK/CHANGE THE CATYLIC CONVERTER, SINCE IT IS PROBABLY WHY YOU NEED AN O2 CENSOR

Feb 23, 2010 | 2001 Pontiac Aztek

1 Answer

Out of no where the car started to sounded like it was choking at a steady pace. The check engine light came on diagnosing misfire in multiple/random cylinders. After a short drive, the catylitic converter...


Its rich. You need to measure fuel pressure, and find out why its so rich. This will need to be fixed before you replace the converter. Its time to get a repair shop involved.

Jan 17, 2010 | 2004 Oldsmobile Alero

1 Answer

1999 ford ranger 4x4 wont engage


ck frt drive shaft out of trans-fer case is turning if it is ck both hubs on outside of axles auto locking hubs have alot of problems

May 30, 2009 | 1999 Ford Ranger SuperCab

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