Date: Sun, 7 Nov 2010 11:35:56 -0800
Reply-To: Jake de Villiers <crescentbeachguitar@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Jake de Villiers <crescentbeachguitar@GMAIL.COM>
Subject: Re: horrible cold start idle, running rich
In-Reply-To: <AANLkTineiMBCYjH3ZxyfTrRw=oe+sfS-biha_Epd1G=_@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
You might also want to blow through the return line back to the tank and
listen for bubbles. If that was blocked you'd have similar symptoms and
real trouble...
On Sun, Nov 7, 2010 at 11:24 AM, mordo <helmut.blong@gmail.com> wrote:
> Thanks, Jake. I have always been suspicious of the regulator. I have
> actually just come inside from an effort to test fuel pressure. Harbor
> Freight tools fail me again - the test gauge was simply slowing down the
> fuel flow through it rather than measuring it.
>
> A failing FPR may also explain the small leak of fuel near the FPR I spied
> yesterday. I tighten clamps at the T that seemed to stop it. But, it may
> well have been that the overpressure condition was forcing it past otherwise
> tight connections.
>
> cheers,
>
>
>
>
> On Sun, Nov 7, 2010 at 1:48 PM, Jake de Villiers <
> crescentbeachguitar@gmail.com> wrote:
>
>> It sounds as though your fuel pressure regulator has failed.
>>
>> When the internal diaphragm goes, the injectors see full pump pressure (~
>> 70 PSI) instead of the ~35 PSI they need. You can hook up a gauge at the
>> test port provided or just go ahead and replace it - they aren't expensive.
>>
>> Good luck!
>>
>>
>> On Sun, Nov 7, 2010 at 10:00 AM, mordo <helmut.blong@gmail.com> wrote:
>>
>>> Greetings, Volks.
>>>
>>> I find myself relying on La Vana Blanca as my daily driver for a bit
>>> while
>>> the company car is in shop awaiting repairs. The cooler weather seems to
>>> have brought on a new fuel system problem in the van. There is so much
>>> written about idle, fuel mix, temp II sensor, etc. that I find it
>>> difficult
>>> to parse pertinent info. Will appreciate any clarity that can be offered.
>>>
>>> The engine starts readily from stone cold (in the mid 30sF here at night)
>>>
>>> but the idle is very rough. Almost feels like only 3 cylinders are
>>> firing.
>>> After 3 minutes of trying to nurse this idle smooth, the van will drive
>>> but
>>> only with severely diminished power and lots of smoke from a way too rich
>>> mixture.
>>>
>>> If during this initial cold start, I disconnect temp II sensor the idle
>>> smooths at about 1000-1200 rpm. However, I cannot accelerate and drive
>>> with
>>> temp II disconnected - the engine bogs down and sputters badly.
>>>
>>> After about five minutes of nursing the throttle and chugging along, the
>>> engine will suddenly smooth out and drive reasonably well though somewhat
>>> under-powered. But it is certainly firing on all cylinders. Not nearly
>>> the
>>> pick-up and power as normal. It will idle at stop and generally behaves
>>> alright.
>>>
>>> Fuel economy is miserable - about 75 miles to the half tank at the
>>> moment.
>>> Fuel smell is strong; the engine is surely running rich.
>>>
>>> Temp II sensor is about 6 months old. Plugs are about 3 months old. Fuel
>>> pump and filter, likewise 3 months old.
>>>
>>> This seems like a faulty temp II sensor based on a lot of what I read but
>>>
>>> also suspect the TPS.
>>>
>>> Cheers,
>>>
>>> --
>>> mordo
>>> 1990 Carat
>>>
>>
>>
>>
>> --
>> Jake
>>
>> 1984 Vanagon GL 1.9 WBX 'The Grey Van'
>> 1986 Westy Weekender/2.5 SOHC Suby 'Dixie'
>>
>> Crescent Beach, BC
>>
>> www.thebassspa.com
>> www.crescentbeachguitar.com
>> http://subyjake.googlepages.com/mydixiedarlin%27
>>
>>
>
>
> --
> mordo
> 1990 Carat
>
--
Jake
1984 Vanagon GL 1.9 WBX 'The Grey Van'
1986 Westy Weekender/2.5 SOHC Suby 'Dixie'
Crescent Beach, BC
www.thebassspa.com
www.crescentbeachguitar.com
http://subyjake.googlepages.com/mydixiedarlin%27
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