Re: [AMC-List] Failed HC emission test

["Jim Blair" <carnuck@xxxxxxxxxxx>]

Did you do an oil change just prior to the test? That makes a huge 
difference by itself. Aside from that, a new air filter and Autolite plugs 
usually work. What condition is the cat? Do you fill the gas tank as far as 
you can? (rookie mistake. It floods the charcoal cannister and overloads the 
HCs. I had to unplug my cannister temporarily because my son did that on my 
'83 Eagle wagon)
   Still running stock coil? The TFI upgrade helps a lot but even just a 
'70s Mopar ignition coil (which requires removal of the stupid horseshoe 
connector that can cause a miss) cuts missing down a lot. Aside from that, 
checking float level and adjusting the metering rods will help a lot (I love 
being able to adjust the rods externally) I usually de-carburize the engine 
before I do the oil change too.
  If you have blowby, temporarily re-route it to a cannister. Many higher 
mileage 4.0L engines need to do this as well to squeak by the test.


From: Marty Bricker <mbrickerusn@xxxxxxxxx>
Subject: [AMC-List] Failed HC emission test
To: AMC List <amc-list@xxxxxxxxxxxx>
Message-ID: <128179.61943.qm@xxxxxxxxxxxxxxxxxxxxxxx>
Content-Type: text/plain; charset=iso-8859-1

The emission control computer on my 83 SX/4 has failed
so I performed a 'Nutter' bypass so it would start.  I
recently failed the HC emisson test.  Any suggestions
on how to lower my HC emissions.  Thanks.

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