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  #1  
Old 08-06-2016, 08:56 PM
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Default MOT fail...CO reading

Took HiHo for a MOT today after being wrapped up in the garage since Sept. I had changed the plugs ( 06's) a few days before.

Had a catastrophic fail on the CO reading at 11%

Haven't changed anything since last year and it went through at 3% ( or there abouts ) standard non cat figure.

They suggested O2 sensor, so I got home, had a look, and there isn't one?? Is that even possible?
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Old 08-06-2016, 09:35 PM
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Is there not a 02 sensor on the exhaust headers at the up pipe flange on the early scoobs ?
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Old 08-06-2016, 09:37 PM
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If it's a real early one it may be in the header. The wire comes up the left side of the cam belt cover with a connector near the corner of the cover.
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Old 08-06-2016, 09:53 PM
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Quote:
Originally Posted by Scott.T View Post
If it's a real early one it may be in the header. The wire comes up the left side of the cam belt cover with a connector near the corner of the cover.
Cheers Scott, yep 3 wire one in the headers.

Soooo...If this was faulty, wouldn't it throw a cel?
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Old 08-06-2016, 10:02 PM
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Quote:
Originally Posted by Mortster View Post
Cheers Scott, yep 3 wire one in the headers.

Soooo...If this was faulty, wouldn't it throw a cel?
Only if you do a diagnostic test
If it's dead it probably running about 12AFR instead of 14.7.
They run better disconnected as it won't be getting a duff signal.
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Old 09-06-2016, 12:41 PM
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Just a thought have you dumped and put in new fuel?
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Old 09-06-2016, 02:04 PM
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Quote:
Originally Posted by BlueBugEye; were 226926
Just a thought have you dumped and put in new fuel?
I did think of that this morning, and that when changing the plugs I could have unplugged the lamda. I'll give it a good going over Saturday.
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Old 09-06-2016, 03:07 PM
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Mine ran like crap on year old fuel even with closed loop lambda.
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Old 14-06-2016, 11:03 PM
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Popped in a new Lamdba today and the idle speed has gone by 150 ish rpm and it get to normal operating temp quicker? Is that normal?
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Old 16-06-2016, 01:26 PM
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Well, the Lambda dis the trick, reading dropped down to 1.3%.
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Old 16-06-2016, 01:30 PM
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Result.....
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