[MR2] Emissions Issues, was Re: Zack's mr2

[Benn]

And when I had my Mk I '86 with 125K done two years ago, I was within 1ppm 
of failure (on HC, as I recall).  I assumed the cat was failing, and for 
sure would have to replace it this time to get it to pass.  Last month, had 
it tested and passed, with HC about 2/3 of max allowable.  Go figure.  But, 
perhaps another clue--a recent fillup only got ~20mpg!  Hmm.  Injectors 
getting hinky?  Thoughts?
Benn

----- Original Message ----- 
From: "William Brandt" <wbrandt1 at sbcglobal.net>
To: "MR2 List" <mr2 at mr2.com>
Sent: Monday, February 28, 2011 9:33 AM
Subject: [MR2] Zack's mr2


> Usually if you know what gasses are over the limit you can tell what 
> component is bad. On my 86 it always been either the O2 sensor or the cat.
>
> And if the cat at the dealer is too expensive NAPA  has in the past sold a 
> direct bolt-in unit.
>
> Speaking of O2 sensors I have learned something about them.
>
> In both of my old cars the sensors have had a lot of miles on them - in 
> the case of the Mercedes - 200K miles and the MR2 - at least 100,000 
> miles.
>
> I noticed at night in the Mercedes the O2 light would come on just for an 
> instant at times so I put a new one in and mileage went up a mile per 
> gallon.
>
> I am thinking if they are old even if the warning light doesn't come ion 
> and stay on it is good to replace them.
>
> Bill
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