Hello,
Driving yesterday I found the van started to splutter and surge, first at around 55mph, but progressively worse so that it started to struggle a bit moving off. Worst of all was constant part throttle. Occasionally it would clear altogether.
If you pumped the accelerator it would overcome the issue, suggesting to me it's a bit lean, and the pumping overcomes this temporarily.
So thoughts are:
Air leak (can't find one)
Fuel filter (new tank and filter fired by PO)
Fuel pump not keeping up (new brickworks one on it)
Little filter in the carb inlet (clean as a whistle)
In case its ignition related
Timing well off (to check still, but dizzy hasn't moved)
Ignition model (brand new one fitted)
Plugs/leads etc (new set fitted)
So now I'm thinking its one of the many little vacuum pipes round the carb, so will check them next
Any other cunning ideas??