Date:         Wed, 7 Dec 2016 10:14:46 -0800
Reply-To:     Pat Spragge <spraggepat@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Pat Spragge <spraggepat@GMAIL.COM>
Subject:      Re: intermittent running rich issue
Comments: To: John Goubeaux <john@UCSB.EDU>
In-Reply-To:  <ed25207c-b525-4a35-fd4a-92d7c7c19a00@ucsb.edu>
Content-Type: text/plain; charset=us-ascii

John

My last post mentioned the thermostat...I replaced mine and there was no change. 
I am curious about the stalling and hard restart issue you mentioned as I have never experienced that. 
Mine starts easily every time; never stalls. Idle is consistently at 950rpm. If it stumbles I either "feather" or "floor" the accelerator and continue on my way. The stumble always occurs when I am stopped at a light or stop sign and begin to accelerate. This behavior starts about 30-60 secs after a cold start and ends once the temp needle starts to move. Or about 2-3 minutes after starting. 

Sent from my iPhone

> On Dec 7, 2016, at 10:02 AM, John Goubeaux <john@UCSB.EDU> wrote:
> 
> Now someone else mentioned the thermostat as a possibility. So at cold
> start the thermostat should be closed and slowly open as engine warms
> up, right?
> 
> IF it was stuck open while the car was still cold ( ie at startup) my
> assumption is cold coolant would be circulating back to the engine and
> not allow the engine to warm it before the thermostat opened as it
> usually does.  I'm not clear how this would cause an intermittent rich
> running overload and almost stalling condition but this is where my
> knowledge of of the fuel injection system is limited.
> 
> I also don't know how thermostats usually fail, when they do and do they
> stick open, or just not open all the way up as they should ?
> 
> 
>> On 12/7/16 9:35 AM, Dan N wrote:
>> I am wondering if the thermostat could be stuck open intermittently...