Date:         Sat, 31 Mar 2007 20:49:39 -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:  <BAY125-DAV224123A29BFFE860544FCA0620@phx.gbl>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Succinctly put, Dennis.

I believe the filter is the real culprit here. It is a clear plastic round
filter and it looks cruddy. THe tank is about 2 years old - one good thing
the PO did. I did run the pick up dry a few months ago so maybe whatever is
in the tank finally plugged the filter.

cheers,

morod


On 3/31/07, Dennis <d23haynes57@hotmail.com> wrote:
>
> Big metal fuel filter after the pump.
> Fuel pressure in spec at idle, regulator is working.
> No pressure under load, restricted filter, defective pump, or tank is
> loaded with crud. I would suspect the tank. If the filter is clogged, also
> sign of a bad tank.
>
> Dennis
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> mordo
> Sent: Saturday, March 31, 2007 6:00 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Surging between 1700 and 3000 rpm
>
> Yes, o2 sensor has no effect, connected or not. Checked distributor - it
> looks good. I put a new eye on the ground for good measure.
>
> I measured fuel pressure at the T both with and without vacuum connected.
> Both are at spec. However, under load, both with and without vacuum
> connected, the pressure drops precipitously to almost ZERO.
>
> So, FPR, fuel pump or restricted filter? I will start with the inexpensive
> and easy filter because I am already suspicious of this one.
>
> Would the FPR malfunction both with and without vacuum connected?
>
> Also, I know this has been debated but what's the consensus? Filter before
> AND after the pump or just before the pump?
>
> ciao,
>
> mordo
>
> ---------- Forwarded message ----------
> From: Benny boy <huotb@videotron.ca>
> Date: Mar 31, 2007 1:54 PM
> Subject: Re: Surging between 1700 and 3000 rpm
> To: VANAGON@gerry.vanagon.com, Mark Mordhorst <helmut.blong@gmail.com>
>
> It can be any following items:
> -AFM
> -Fuel regulator, pump, tank
> -Temp sender (the blue one mostly)
> -Distributor (yea, i'm having a lot of trouble with those lately, check
> inside, remove dust cap, check wires/hall sender), check the cap, inside,
> the center pin should spring OUT, easily, check also the ground on the
> same
> harness (top of left head)that goes to the distrubutor, check the plug
> aslo.
>
> OS could do that but you said it's ok?
>
> Ben
>
>
> --
> mordo
> 1990 Carat
>
>


--
mordo
1990 Carat