Hi, did a motor rebuild as #1 cyl was toast. replaced plugs, leads, dist cap, rotor and cleaned fuel tank. changed fuel filter twice. problem is, when van is driven over 20kms distance, it starts to stutter.revs drop down. compression is ok. fuel is ok. new battery, charge sys is a bit low but not enough to make a difference (13.9 v).
any thoughts?

Cars & Trucks - Volkswagen - Camper - 1986 Volkswagen Wagon Camper