Water in the gas tank?   Just did that... the expansion tank rubber
grommets on my 84 were useless, and those expansion tanks are perfectly
positioned in the wheel wells to collect water on their flat tops, with
tubes to take that collected water back into the main tank.
    I surmised that as long as you're moving and the engine is running, the
water in the gas is all mixed up and doesn't hurt the running but when you
shut down for a while, the water that was in solution with the gas settles
out, then when you start again, you get mostly water to run the motor..
  I don't know if mine "seemed" to "show" rich symptoms, but bad gas and
rich are similar in manifested symptoms...

On Dec 7, 2016 8:51 AM, "John Goubeaux" <john@ucsb.edu> wrote:

> In my case I've already replaced both the AFM and TB with rebuilt ones
> and had them adjusted, so I'm gonna rule them out BUT know they can add
> to bad running issues.
>
> -john
>
>
> On 12/7/16 8:46 AM, Dan N wrote:
>
>> also...it could be a worn throttle body or a faulty throttle body switch
>>
>