problem one.. do you have a genuine mann oil filter? don't use a fram
... run 20w 50 oil in temperatures above 60 degrees.. always...
that should fix your problem.. if not.. you have a worn out engine or
oil pump...
problem two... oxygen sensor or temp 2 sensor.. but i would say oxygen
sensor..
problem three.... new thermostat seems in order..
hope this helps...
jesse
89 carat

On Apr 15, 2004, at 7:37 PM, Matt Slater wrote:

> So let me give you a quick history of my "new" 89 Vanagon GL.  So far
> I've
> replaced the heads, water pump, the pipe that connects the pump to
> thermostat, temp relay in the radiator, temp sender, and finally the
> distributor.
>
> Now here's my new problems.
> 1)  On a drive from Flagstaff to Moab the oil pressure light and
> buzzer come
> on once the engine is heated up quite a bit, it only happens when
> going up a
> hill and the RPMs drop below about 2600 or when slowing down when
> approaching a town and again the RPMs drop down.  As soon as the RPMs
> go
> back up (downshifting) the buzzer and light go back out.
>
> 2)  The idle is all crazy.  When I start the engine it does better but
> after
> warming up it really starts to jump around a lot until it dies.  Also,
> when
> I come to a stop and push the cluth down the van cuts out also.
> Everytime
> it does this it just fires right back up but the idle is still all
> crazy.
>
> 3)  The van seems to be running a bit hot before the fan turns on.
> I've
> seen it go up to about 7/8 of the way up before the fan comes on.  Now
> I
> thought that replacing the relay in the radiator and the temp sender
> would
> alleviate this (of course they were both bad anyways so they had to be
> replaced).  Coolant isn't leaking anywhere.  I'm just getting kind of
> tired
> of driving through the desert with my heat on full blast.
>
> Any suggestions on what may be the problem or if this thing is safe to
> drive
> back to Flagstaff (about 300 miles) would be greatly appreciated.
>
> Matt