10% CO at idle seems extremely high to me. There must be something out
of tune or worn here. Between 2-5% CO should be fairly easily attained
using a Colortune with properly build and maintained SU's . In the 50's
and 60's 5-10% CO was not regarded as excessive.
High CO values always coincide with high hydro-carbon emissions because
of partially unburned fuel. Another source of hydro-carbons is excessive
oil consumption because of worn piston(ring)s
Servicing the carbs and tuning them properly will result in meeting the
standards.
Kees Oudesluijs
NL
Op 26-7-2013 0:32, Atkinson, Robert schreef:
> The State of New Jersey has changed it's regulations so that cars older than
> 25 years are no longer eligible for "Collector Vehicle" status, a status which
> requires no emissions compliance but limits usage to no more than 3,000 miles
> per year (which is not a problem for me). As a result, the Motor Vehicle
> Commission has refused to renew my Collector inspection sticker for my 1966
> BJ8. My status choice now is: 1) "Antique" status, which has no emissions
> inspection but requires the infamous "QQQ" plates and theoretically limits
> usage to parades and club events, or 2) regular license plates and satisfying
> emissions standards.
>
> So, as soon as the DVM refused the renewal, I decided to see if my 1966 BJ8
> (with electronic ignition) could pass the emissions inspection (theoretically
> against some 1966 standard), fully expecting it to fail, which it did. My
> questions:
>
> 1. Is it at all possible that an Austin Healey can pass an emissions test in
> New Jersey?
>
> 2. The "failure" was in the "idle" test with the following results:
>
> * Hydrocarbons parts per million: tested 1476 versus standard of 1400
> (seems pretty close)
> * Carbon monoxide (CO) percent: tested at 10.15% versus standard of 8.5%
> (not sure if that is close)
>
> I'd appreciate some suggestions on how to reduce both "hydrocarbons" (which I
> presume is largely unburned fuel) and CO.
>
> My first (only) thoughts:
>
> * Increase idle speed
> * Adjust carbs to leanest possible mix
>
> Any other thoughts?
>
> It doesn't cost me anything to retake the emissions test (other than time), so
> I'd like to be able to go through inspection, make some screw driver
> adjustments in the inspection station parking lot and go through again and
> again until I "pass."
>
> Thanks
>
> Bob Atkinson
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--
Kees Oudesluijs
Dorpsstraat 183
2995XG Heerjansdam
T: 078-677 1233
E: coudesluijs@chello.nl
Technische commissie Jensen Healey en GT
Het Jensen Genootschap Holland
www.jensenholland.nl
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