Date: Sun, 26 Aug 2012 16:16:15 -0500
Reply-To: George Laubach <skiplaubach@COMCAST.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: George Laubach <skiplaubach@COMCAST.NET>
Subject: Re: Poor Hot Start Discovery - midway through solution
In-Reply-To: <503A873D.5050904@turbovans.com>
Content-Type: text/plain; charset=us-ascii
Clarification time:
1. I (OP) do not pump the accelerator or even touch it when I start the engine. I was simply (attempting) to describe an experience of starting the engine when the engine turns over and over (and doesn't start) in a hot start situation. In fact, as the engine turns over and over, I depress (not pump) the accelerator. I conclude (based on Scott's narrative) that by doing so I am introducing more air, not (as I wrongly hypothesized) that I was inhibiting fuel injector spray.
2. I'll check the charcoal filter valve. I've not ventured into that realm yet. BTW, my fuel injectors were cleaned and tested 3,500 miles (4months) ago by the Michigan guy (sorry).
3. I still have not read a crystal clear explanation of what the Temp II sensor does. I mean, what does the varying ohm signal from the Temp II sensor "cause and affect"? For example, coolant hot, ohm signal low, this measure travels to the ECU via the connector, resulting in a signal pathway to what(s)? And then what(s)? And for why(s)? That sort of thing. Please. Thanks.
Skip
Sent from my iPad
On Aug 26, 2012, at 3:29 PM, Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM> wrote:
> pumping the gas pedal prior to starting has no affect.
> other than psychological perhaps.
>
>
> On 8/26/2012 12:40 PM, neil n wrote:
>> Since the PO has experienced some degree of success by "stepping on the
>> accelerator", my thought was toward a failed charcoal filter purge valve.
>> My reasoning being that if that valve has failed open and is allowing fuel
>> vapours to pool in the intake, say when van parked while shopping, opening
>> the throttle body valve would indeed lean out the mix and help the the
>> engine to start.
>>
>> Not saying the temp II sensor or wiring isn't at fault. But. That charcoal
>> filter valve is easy to check.
>>
>> Caveat: I am also neither a mechanic or engineer. ;)
>>
>> Neil.
>>
>> On Sun, Aug 26, 2012 at 11:27 AM, Dave Mcneely <mcneely4@cox.net> wrote:
>>
>> I doubt that pumping the accelerator helped your vanagon to start, but
>>> rather that something coincidental with the action made the difference.
>>>
>>> But what do I know? I'm certainly no engineer or mechanic either. mcneely
>>>
>>> ---- Skip <skiplaubach@COMCAST.NET> wrote:
>>>
>>
>>>> I also thought that by stepping on the accelerator, that would inhibit
>>> the amount of fuel being pushed into the fuel injectors, thereby reducing
>>> the impact of "flooding". This action (by me) actually helped in cases
>>> where the van would not start when the engine was hot. Though the engine
>>> would turn over alot, if I depressed the accelerator that engine would
>>> finally begin running.
>>
>> --
>> Neil n
>>
>> 65 kb image Myford Ready For Assembly http://tinyurl.com/64sx4rp
>>
>> '88 Slate Blue Westy to be named.
>>
>> '81 VanaJetta 2.0 "Jaco" http://tubaneil.googlepages.com/
>>
>> Vanagon VAG Gas I4/VR Swap Google Group:
>>
>> http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines
>>
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