Does it do it regardless of the engine temp?
Does your Idle Stabilizer Valve work?
Did you check the timing?

Pat

From:   Steven Johnson <sjohnso2000@GMAIL.COM>
To:     vanagon@GERRY.VANAGON.COM
Date:   10/16/2015 01:54 PM
Subject:        Hesitation while driving (manual)
Sent by:        Vanagon Mailing List <vanagon@gerry.vanagon.com>

Hi All,

The patient: 1990 Vanagon Camper
Stock 2.1 engine
Manual transmission

The symptoms:

   Hesitates just after shifting while accelerating.  Hesitates when
changing pressure up on the accelerator.   Release and it stops
hesitating.

It idles fine.   Revs fine with no load.

So I'm not sure what's going on here.
Fuel pump?
Fuel filter?
Ignition: just changed the plugs/cap/rotor.

I'm thinking it's time to change the spark plug wires too.

I just don't want to spend too much on guesswork.

Thanks for any and all suggestions.

Steven

91 Westy