Thanks, is your situation intermittent, and only during the warmup cycle
? Just curious, as it looks like several things can cause this
situation, including apparently bad grounds and AFM issues. And there is
of course the known "vanagon syndrome" which is AFM related and can
happen at any time as far as I know.

-john

On 12/7/16 8:39 AM, Patrick Spragge wrote:
> John,
>
> I have a very similar problem as the the one you describe. One thing that I notice is that when the 'stumble' occurs, if I floor or nearly floor the accelerator, it accelerates normally. Also, I replaced the Temp II sensor which made no difference.
>
> Patrick Spragge
>
>> On Dec 6, 2016, at 10:00 AM, John Goubeaux <john@UCSB.EDU> wrote:
>>
>> Yes, that connector IS on and tight and is a pretty tight fitting one
>> but maybe it is worn?   The  AFM was recently replaced with a rebuilt
>> one too.
>>
>> The fact that the issue has always gone away after the engine warms up,
>> eg warm up cycle, seems to point to coolant sensor or it's circuit I
>> believe.
>>
>> -john
>>
>>
>>> On 12/6/16 9:53 AM, Dan N wrote:
>>> /"stumble and run rich on accelerating at some point soon afterward"/
>>>
>>> this symptom is very similar to when I forgot to put the connector
>>> back on the AFM...
>>>
>>> could that connector be worn and not giving a tight connection?