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Posted: Thu Aug 28, 2014 2:56 pm
by DaveEFI
You've checked the obvious things like the air filter?
Should be 1-2% CO.
Posted: Thu Aug 28, 2014 3:03 pm
by The Saint
It has a K&N cylinder filter which was cleaned and re-oiled less than 500 miles ago.
What else can I check ?
Posted: Thu Aug 28, 2014 8:49 pm
by ChrisJC
Is there not an adjustment for CO? I forget.
Chris.
Posted: Sat Aug 30, 2014 10:39 pm
by SimpleSimon
There should be a CO/mixture screw on the air mass meter if its a pre-cat engine
I am assuming its a pre-cat EFI RV8
Posted: Sun Aug 31, 2014 7:55 pm
by The Saint
It's a '91 3.9 RV8 Range rover classic. It has no cats but has a full stainless exhaust system. I'm assuming the cats haven't been removed with the exhaust change.
Posted: Sun Aug 31, 2014 8:45 pm
by stevieturbo
There may be some way of adjusting mixture, all the CO is saying is that it is a little richer than maybe liked for MOT purposes.
But still perfectly legal and not a problem
Posted: Sun Aug 31, 2014 9:54 pm
by SimpleSimon
The Saint wrote:It's a '91 3.9 RV8 Range rover classic. It has no cats but has a full stainless exhaust system. I'm assuming the cats haven't been removed with the exhaust change.
That being the case it as a small recessed screw/potentiometer on the Air Flow Meter in a recess on the exit side, you can see its housing right of this pic
