Date:         Tue, 3 Apr 2007 22:18:49 -0400
Reply-To:     mordo <helmut.blong@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         mordo <helmut.blong@GMAIL.COM>
Subject:      Re: Surging between 1700 and 3000 rpm
Comments: To: Dennis <d23haynes57@hotmail.com>
In-Reply-To:  <002a01c7765d$9af82be0$0201a8c0@MASTERPC>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

I did not know that about that kind of filter. I didn't run the number of
this Purolator filter but I know Purolator specs one for the 2.1 vanagon.

I don't think it's sealer that is the goo simply because i have the PO's
receipt for the tank replacement and it's about two years old. The tank
still has a clean, shiny finish on the outside. I suppose it could be
reconditioned.

With that regulator-like device on the output end it compels me to do an
output test to make sure I'm getting the appropriate flow even witha clean
filter.


On 4/3/07, Dennis <d23haynes57@hotmail.com> wrote:
>
> That fuel filter is designed for a carbureted application. Not designed
> for the flow of a recirculation FI system. That and the goo resulted in
> the element collapsing. That pump looks like maybe it belongs inside a
> fuel tank, not external. The goo is interesting. Maybe a fuel tank sealer.
>
>
> Dennis
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> mordo
> Sent: Tuesday, April 03, 2007 8:53 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Surging between 1700 and 3000 rpm
>
> I haven't corrected this problem yet due to a lack of appropriately sized
> fuel line at my FLAPS, but the photos at this link is certainly evidence
> of
> the problem being a restricted filter:
>
> http://picasaweb.google.com/mmordo
>
> Check out the sassy, cobbled-together fuel pump rig I'm running. The
> filter
> was before the pump. I beleive it is what the FLAPS calls out in as spec'd
> in the Purolator brand.
>
> What do we think the goo is? It looks waxy and very much like something
> you
> don't want in your fuel system.
>
> There appears to be some sort of pressure regulator on the outbound end.
> Is
> this typical of the OEM pump? I suspect not. I wonder what vehicle it's
> intended for?
>
>
> ---------- Forwarded message ----------
> From: mordo <helmut.blong@gmail.com>
> Date: Mar 31, 2007 12:15 PM
> Subject: Surging between 1700 and 3000 rpm
> To: vanagon@gerry.vanagon.com
>
>
> I'm bumping this post in hopes for some diagnostic help.
>
> I thinkn calling this condition "surging" was inaccurate on my part. It is
> actually just momentary loss of power.
>
> The condition presents with the engine warm, and the engine under load. I
> have tested fuel pressure at the T and it is at spec.
>
> I am thinking that the throttle valve switch is a possible culprit. My
> question now is what is "full throttle"? If the switch is defective or
> misadjusted, would the switch out of adjustment cause this momentary dying
> condition under full throttle?
>
> I've just checked continuity and adjustment of the TVS and it appears to
> function properly. Given where the throttle is when the the swithc closes
> for full throttle, I would guess that the TVS is not related to this power
> loss. The throttle valve is open to its stop when the switch closes.
>
> To recap:
>
>
>   - 2.1L wbx with Vanagon syndrome harness installed
>   - Idles fine
>   - Under load, at about 1500-1700 rpm, the egnine dies and then revs up
>   to about 3000 rpm. Dies, revs. Dies, revs.
>   - If I hold the throttle steady it does this very consistently
>
> I'm at a loss. Any ideas?
>
> Thanks,
>
> mordo
>
>
> ---------- Forwarded message ----------
> From: mordo <helmut.blong@gmail.com>
> Date: Mar 25, 2007 4:31 PM
> Subject: Surging between 1700 and 3000 rpm
> To: vanagon@gerry.vanagon.com
>
>
> I just went out for a drive, the third short trip of the day. The van ran
> fine the first two trips except on a fairly steep grade near my house. On
> this grade, the engine loses power and drops to about 1500 rpm. By
> feathering the throttle, I could get it to rev up again and get me home.
>
> This third trip, the engine consistenly surged between abot 1700 and 3000
> rpm at about 25-30 mph. This is an automatic 2.1L wbx. Feathering the
> throttle seemed to have little positive effect. Accelerate from a stop and
> rev up to about 3k rpm - it dies and drops to about 1700 rom and then it
> goes right back up to about 3000rpm. A moment later, it drops back to 1700
> rpm and so on.
>
> I would be willing to believe it is a clogged fuel filter but why would
> the
> surging be so consistent?
>
> The engine idles fine. The engine is warm, not full on hot.
>
> I checked the fuel pump wiring before this trip. A good wiggle on all
> connections did not produce any negative effects. The fuel filter is a
> clear
> plastic, round filter in frotn of the pump. It seems to have some strange
> muck at the bottom side of the filter.
>
> Any lucid insights, list?
>
> --
> mordo
> 1990 Carat
>
>
> --
> mordo
> 1990 Carat
>
> --
> mordo
> 1990 Carat
>



--
mordo
1990 Carat