[T2] Briefly unresponsive engine - HELP please !!!

[al sinclair]

there's no rev change at all. It's like a slightly "more open" sucking
sound (which I might be imagining) where I think maybe the throttle
flap-valve opens but no extra fuel goes in (entirely guessing here)

If it's the airflow meter flap, which seems possible/likely, is there a
recommended way to free it? Or does the meter have to be replaced?
thanks!


On Tue, Dec 18, 2018 at 5:00 PM Sami Dakhlia <sami.dakhlia at gmail.com> wrote:

> Hi,
> I'm not sure what you mean when you say that the sound of your engine
> changes. Does it rev? If so, I'd guess it's an issue with the automatic
> transmission. If it does not rev, then I would guess the flap in the
> air-flow-meter is sticky.
> Sami
>
> On Mon, Dec 17, 2018 at 12:47 PM al sinclair <alvanagon at gmail.com> wrote:
>
>> Please help suggest a cause of a new problem in 1981 aircooled Westie,
>> automatic not stick shift.
>>
>> Occasionally there's no response from the engine when pushing the
>> accelerator pedal to accelerate from stationary. The pedal moves normally,
>> and the sound of the engine changes so I think the throttle opens, but
>> there's no change from idle, no increase of power for at least several
>> seconds. Then the engine behaves totally normally. I've tried pumping the
>> pedal when this happens but it makes no difference.
>>
>> The engine was rebuilt a couple of years back (lovely job by Greg Tuttle,
>> installed by Fred's Garage, runs like a dream) maybe 10,000 miles ago.
>> It's
>> had oil changes but little else since then.
>>
>> Any ideas how to identify the cause will be much appreciated. The problem
>> isn't reproducible on demand, it only happens now and then - and can be
>> scary if I'm pulling out across the road.
>>
>> (Above was posted to the vanagon list, where Ned Savoie suggested asking
>> here.
>> These ideas came from Larry Alofs there though I haven't followed up as
>> I've been unwell:
>>
>> >If an air cooled has a switch on the throttle, I would check that it is
>> working.
>> >Also check that the movable vane in the airflow meter is not sticking.
>>
>> )
>>
>> Yesterday the same happened again but for several minutes instead of
>> briefly (well, still brief but it felt like hours sitting in a stoplight's
>> left turn lane!) So now it's become a MUST FIX ASAP, but tricky as it's
>> still only occasional
>>
>> thanks
>> Alan
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>
>