I had a similar issue. Auto trans. I'd try to cross an intersection, step
on the throttle and BOG! BLAH!

Just replaced  my thermostat... It was stuck open. Haven't had the boggy
/too rich problem since then. Going on a week of solid driving now. 2,000
miles

Ralph at VC mentioned a stuck thermostat open will make the ecu  think van
isnt warmed up and will make engine run rich

Only wish I had opted for the 82* stat vs the 87*

Abel Longoria

On Dec 5, 2016 4:18 PM, "John Goubeaux" <john@ucsb.edu> wrote:

> Hi Guys,
>
> 90 2.2 gowesty engine
>
> I've experienced an intermittent running rich / loading up condition
> condition. When I say intermittent, I've seen it say 4 times in the last
> 2 months.
>
> It's always been on the warmup cycle after startup where the car starts
> fine, idles OK but begins to stumble and run rich on accelerating at
> some point soon afterward.
> It eventually goes away after the engine runs a while and warms up. The
> last time it happened, yesterday morning the car stalled and would not
> start.
> I left it off and re-tried after 10-15 minutes and it started right up
> and the issue went away.
>
> Because this condition has been infrequent, I've not put much thought
> into it BUT am now considering the " Temp II "  coolant temp sensor to
> be the potential problem source.
>
> Am I correct in assuming that this is the likely root of the issue,
> maybe sending the ECU some out of bounds values ?
>
> Should I replace it altogether, or clean the contacts and maybe add some
> dielectric grease ?
>
> Thanks for any input.
>
> -john
>