replies Archived Message
Posted by Paul Rose on June 30, 2006, 10:28 pm, in reply to "Re: Ford Focus 1.6 Zetec 2002 - CAT Poor efficiency"
Hi Shaun, the rear sensor shouldn't be switching at all. The cat really needs 2 things to work efficiently
1. To be hot
2. for the correct mixture going in to the cat. Number 1 is pretty easy to establish
Number 2 can be established by looking at the lambda reading (providing you are sure there are no leaks in the exhaust) the lambda reading is not measured it is calculated from the gas readings and gives you a good idea if the emissions going in to the cat are correct. As a rule of thumb use the MOT BET specs 0.97 - 1.03 If the lambda is correct and the cat is hot it should work. If the rear lambda sensor is switching then like you said the cat isn't working. Hope this helps Paul
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| Message Thread:
- Ford Focus 1.6 Zetec 2002 - CAT Poor efficiency - Sean Connelly June 30, 2006, 3:20 pm
- replies - Peter Warman June 30, 2006, 5:08 pm
- replies - Tom Yates June 30, 2006, 5:47 pm
- replies - Sean Mc Gettigan June 30, 2006, 6:08 pm
- replies - mikeg June 30, 2006, 6:16 pm
- replies - Michael Whitworth June 30, 2006, 7:09 pm
- replies - Paul Rose June 30, 2006, 10:28 pm
- replies - Dave Hill June 30, 2006, 10:39 pm
- replies - Eddie Zyla June 30, 2006, 11:02 pm
- replies - Paul Rose June 30, 2006, 11:34 pm
- replies - Nigel Bennett June 30, 2006, 10:33 pm
- replies - mike g July 1, 2006, 9:23 am
- replies - Peter Warman July 1, 2006, 3:29 pm
- replies - Michael Whitworth July 1, 2006, 3:48 pm
- replies - Sean Mc Gettigan July 1, 2006, 4:15 pm
- replies - Alan Kane July 1, 2006, 5:13 pm
- replies - william July 1, 2006, 6:18 pm
- replies - william July 1, 2006, 6:22 pm
- replies - Shaun Dale July 20, 2006, 11:54 am
- replies - Sean Connelly July 4, 2006, 9:00 am
- replies - Sean Connelly July 18, 2006, 9:15 am
- replies - Nigel Bennett July 18, 2006, 7:52 pm
- replies - kevin busbridge July 18, 2006, 9:28 pm
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