Are you testing on fresh oil and making sure the car is good and hot
from a road drive? Made a difference for me.
I have also heard from an emission station guy not to use the platinum
plugs if your car didn't come with them... Don't know about that one.
On Mon, 06 May 2002 18:00:33 -0400, Mike Janacek wrote:
>Car specs: '79B with rebuilt non-biased HS4's. No cat (obviously).
>
>Last week: Car failed on CO percentage (5.06 percent). My CO meter showed only
>2 percent at idle although state does a rolling road test. Airpump frozen. HC
>and NOX readings were very low. State allows 3.56 percent CO max.
>
>This week: After consulting various MG related archives, it appears that an
>airpump would lower the CO. Installed new rebuilt airpump after roto-rooting
>the air-rail and head ports. Check valve OK. Timing good and carbs leaned out
>about as much as I dare. Valve clearances set up normal.
>Failed on CO again (actually a little higher) and again HC and NOX were low.
>
>OK, what are my options, if any, other than going back to the ZS (yep, I still
>have it all, but REALLY don't want to change back!)?
--
Andrew Lundgren
lundgren@byu.net
http://www.Lundgren.us
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