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'Too Rich' idle odor during morning warm-up in my 280GE

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ridgeman
Posts: 210

'Too Rich' idle odor during morning warm-up in my 280GE

Post#1 » Tue Sep 29, 2009 3:14 pm

This odor continues while the 'G' is idling at around 11 and 12 rpms.
Once the vehicle has been driven a bit, the idle goes down to the
7.5 - 8.5 range and I no longer get the 'rich' smell. Is there a
gas-air adjustment I should be doing to eliminate the problem or is
this something I should just live with?

User avatar
DesertStar
Posts: 1328

Re: 'Too Rich' idle odor during morning warm-up in my 280GE

Post#2 » Wed Sep 30, 2009 11:29 am

Common for most petrol motors to run a little rich at warmup. As you know it takes a bit to warmup and for idle to drop. Sounds like your idle values are where they are suppose to be. Here is a thread that talks about mixture adjustment, and a photo showing where to adjust.
http://pointedthree.com/disc/forums/sho ... ch#M136876
Mike
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idleadj.JPG

ridgeman
Posts: 210

Re: 'Too Rich' idle odor during morning warm-up in my 280GE

Post#3 » Thu Oct 01, 2009 2:42 pm

Thanks for all the input. I will get one of those Gunson's.

ridgeman
Posts: 210

Re: 'Too Rich' idle odor during morning warm-up in my 280GE

Post#4 » Thu Oct 01, 2009 4:08 pm

ridgeman wrote:Thanks for all the input. I will get one of those Gunson's.


Was able to locate a new 'Gunson' on Ebay U.K.. Delivered price to
me here in U.S. was $142.30 (USD). Also printed out the G-Tech
article on this site by Dave Gomes concerning 'Idle Mixture Adjustment'
using th 'Gunson'. Dave gives a detailed, beautifully photographed
presentation in step-by-step procedure. Did note that a 'Cat' will
adversely affect the adjustment but luckily my 1984 280GE is minus
the 'Cat'.

User avatar
DesertStar
Posts: 1328

Re: 'Too Rich' idle odor during morning warm-up in my 280GE

Post#5 » Thu Oct 01, 2009 6:00 pm

Yikes...I should have thought to mention that article here. I did notice today that the colder it is the more "rich" smell I get, as we are now getting into the cold season here.
Mike

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