Could be a clogged fuel filter, too.

Karl

----- Original Message -----
From: "Marshall Ruskin" <mjruskin@home.com>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Sunday, April 22, 2001 11:12 AM
Subject: Re: Fuel Pump Performance Issues?

I am not a mechanic....

but I wonder if you have a problem with your fuel pressure regulator.

IMHO, it seems that could explain the loss of power at higher rpms, and
perhaps the goofy drivability.

Marshall Ruskin
84 Westy
  ----- Original Message -----
  From: Brian Doss
  To: vanagon@GERRY.VANAGON.COM
  Sent: Sunday, April 22, 2001 10:31 AM
  Subject: Fuel Pump Performance Issues?

  I have been experiencing minor performance woes for a while now with my
'88
  2.1 liter.  At first, a little cutting out, and I had been worried about
my
  idle being very erratic. So, I fixed and later replaced my AFM. Then, ECU,
O2
  Sensor, Temp Sensor. Bus runs pretty good, but it seems that at top end
RPMs
  there is a lack of power, And the idle still wavers a little. Last thing I
  tried was the fuel filter, but no improvement there.  A mechanic friend
  suggested replacing the fuel pump. So, I'm wondering, those of you who
have
  replaced your fuel pumps, did you have any performance problems like mine
  (caused by fuel pump), or is the fuel pump failure more of a "go, no go"
  catastrophic failure type of issue?

  Thanks,

  Brian Doss
  '88 Weekender, Queequeg