Date: Thu, 11 Sep 2014 17:56:55 -1000
Reply-To: "SDF ( aka ;jim lahey' - Scott )" <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: "SDF ( aka ;jim lahey' - Scott )" <scottdaniel@TURBOVANS.COM>
Organization: Cosmic Reminders
Subject: Re: Engine miss
In-Reply-To: <!&!AAAAAAAAAAAYAAAAAAAAAOt/xdRkfLlAqIF53JVUnbzCgAAAEAAAAAms3ps9iOxLl2/MOwfRUQYBAAAAAA==@dslextreme.com>
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Not sure which engine management you have ,
but if yours has an Air Flow Meter ..I would consider that compoenent.
( which I had once ....cut out at speed..turned out to be a dead spot on
the contacts in the AFM ).
if your system is really like a 92 Eurovan 2.5 5 cylinder those don't
have an Air Flow Meter or an Air Mass Meter either.
if this applies to the original poster's van ....one thing to check on
such a fuel system is the vacuum line going from engine to ECU ..there's
a MAP sensor in the ECU ...
anything wonky about that rubber line can cause running issues.
On 9/11/2014 5:42 PM, Dick Wong wrote:
> Tony,
>
> I have not changed the fuel filter yet. It is post pump. Pump sound pretty
> normal. No idea what's in the tank or how old it is.
>
> I don't think it is a filter obstruction, when I've had that issue, the
> engine will cut out and start coughing at the upper RPMs when the most fuel
> is needed.
>
> I do have a filter waiting under the rear seat, since I intended to change
> it after I had bought Blaze over a year ago.
>
> Thanks for your input.
>
> -Dick Wong-
> 78 Scirocco
> Original Owner
> 87 Vanagon Syncro 2.5 (Blaze)
> Third Owner
> 12 Golf TDI
> Original Co-Owner
>
>
>
> -----Original Message-----
> From: TCollins [mailto:tonycollin@gmail.com]
> Sent: Thursday, September 11, 2014 6:50 AM
> To: Dick Wong
> Cc: vanagon@GERRY.VANAGON.COM
> Subject: Re: Engine miss
>
> Dick,
>
> Have you changed your fuel filter recently? Is it post pump? Any cavitation
> sounds or whining from the pump? Is the tank newer, free of crud?
> When I have these issues I check for gunk slushing in the tank and creating
> an obstruction. These first happened to me a highway speeds. Much like you
> described. It was simpler as I have the square pre pump filter still. Every
> so often I have to blow bubbles into the tanks outlet hose to clear
> obstructions inside at the screen of the tank.
>
> Hth
> Tony
>
>> On Sep 11, 2014, at 12:53 AM, Dick Wong <sailingfc@DSLEXTREME.COM> wrote:
>>
>> Well here goes. Don't know if any of you have this engine
>> configuration, but since it's a Vanagon, I'm asking here first.
>>
>> Now that Blaze is back on the road, I get a miss/hiccup when moving
>> with no load on the engine. I've only noticed this in fourth gear and
>> have not tried it in any other gear yet.
>>
>> Typical situation: In fourth gear, level ground, steady speed. While
>> in this mode, the engine will suddenly lose power for several seconds,
>> then recover. It's not a sputter, it's a sudden loss. No dash lights
>> illuminate, tach is steady, no CEL. All this happens in the 1800 to
>> 2800 rpm range (approximately). I've never experienced this before.
>> When accelerating or decelerating through this rpm range, it never
>> happens, only when at a steady speed. At freeway speeds, 3500 - 4500 rpm,
> I don't see this issue.
>> Digifant (023906023), 2.5L, 5 cylinder, new Bosch plug wires, new
>> Bosch dist. cap, new Bosch rotor.
>>
>> Since this is basically a Eurovan setup, that's my next stop.
>>
>> Any ideas?
>>
>> Thanks.
>>
>> -Dick Wong-
>> 78 Scirocco
>> Original Owner
>> 87 Vanagon Syncro 2.5 (Blaze)
>> Third Owner
>> 12 Golf TDI
>> Original Co-Owner
> -----
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