MOT fail High CO reading --- Help
14 October 2002, 06:31 PM
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HI
My MY93 Legacy (non turbo) failed the MOT again today but not on the lamda that it failed on last week
This time the CO reading is to high on all 3 tests - fast idle 1.74% second fast idle 1.27% and normal idle .66%. Any ideas how i can bring this down? I have replaced the lamda sensor and checked out the wireing to the ECU and cleanded the MAF sensor. No leaks in exaust or induction manifold that i can find. The HC reading is about 40 ppm
Please help I am running out of ideas
Dick.
My MY93 Legacy (non turbo) failed the MOT again today but not on the lamda that it failed on last week
This time the CO reading is to high on all 3 tests - fast idle 1.74% second fast idle 1.27% and normal idle .66%. Any ideas how i can bring this down? I have replaced the lamda sensor and checked out the wireing to the ECU and cleanded the MAF sensor. No leaks in exaust or induction manifold that i can find. The HC reading is about 40 ppmPlease help I am running out of ideas
Dick.
14 October 2002, 07:57 PM
#2
I presume that you got the cat hot before taking it for the MOT, early WRX's are prone to lazy cats, might be worth a high speed run before testing it again, or change the cat.
14 October 2002, 08:00 PM
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Yes the cat was hot, as Mrs took it for test the garage went out and spanked it.
I am thinking it may be the ECU but will get the cat tested. Anyone know a subaru wizard in or near worcestershire?
I am thinking it may be the ECU but will get the cat tested. Anyone know a subaru wizard in or near worcestershire?
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