[alfa] Simon's Rich-running Spider

[adoherty@xxxxxxxxxxxxx]

Simon wrote:

From: Simon Body <body@domain.elided>
 Subject: [alfa] Motronic Spider failed emissions

 Greetings

 My 1991 Spider with Motronic fuel injection failed its emissions testing
 for the second time yesterday.
 Both times it has had:
     Hydrocarbons ~4x the limit
     NOx ~3x the limit
     CO ~25% over the limit.
 Between the two tests, the O2 sensor, filter and plugs were replaced and a
 bottle of fuel injector cleaner run through it  It was a hot engine with >
 20 minutes of good running before the tests. There was no improvement after
 replacing the stuff, in fact everything got about 30% worse !!   I
 interpret the results as the system running rich, but what can be done
 about it?
 Help.
------------------------------

Simon, you might check the cold-start valve. It could possibly be dribbling
fuel
into the plenum. Long-shot, but something to check.


--
Adam S. Doherty
Howard Hughes Medical Institute
University of Pennsylvania--School of Medicine
360 CRB
415 Curie Blvd
Philadelphia, PA  19104   USA

Phone: 215-898-7806
Fax: 215-898-8780
Email: adoherty@domain.elided
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