Hi Mike. Cheers for this. Hope you’re well. End of last year? Accelerator and idling biggest problems. 3 carburettors involved (original/Paul’s off his bus/and a refurb off ebay). All not allowing idle tick over. Kept reading about fuel air mixes and warm air up riser problems. It was colder end of last year so thought that might have been a problem. She was also running rich. Had heavy carbon soot over every spark plug. Bought lots of new replacement stuff. A cheap sealed fuel pump, not used because I went for a Pierberg fuel pump so could dismantle further down the line if any more problems arose, push rod and flange, leads and spark plugs, vacuum unit, fuel filter, ignition coil, idle air cut off valve. All replaced the old stuff. Have an old oil bath air filter so replaced top tubing to carburettor due to it being split. Wasn’t sure if anything in the oil bath filter machinations was old and worn. But didn’t check. Did check all tubings for splits or wear. So really, it was a combination of lots of changes. Took the bus to Paul’s house beginning of May and left it there for a few weeks so he could fine tune. Massive social distancing applied! He lives 20 minutes walk from my hospital, so ideal. I have this complex. Probably a false one. But.. I don’t think anyone likes to be near a nurse at the moment. Mind you. I’ve been washing hands and arms and showering at end of shifts so much over the last months my skin always shines brightly! Anyways. Horrible jerky/cutting out ride at lower speed and lower gears getting it there. Same as before. Ran ok at higher speed. He put the original carburettor (the one inherent when I bought her) back on after stripping and refurbing. Said there was no debris in the eBay carb chambers. But he said the original had the ‘edge’. Nicer all round. All 3 were Solex. No cheap alternative. Did say new vacuum wasn’t pulling the distributor plate round far enough. Didn’t reach maximum turn. So that was fixed. Then she was tuned up. Checked if the pulley was out with the 5% consideration you get on different distributors. But that was all ok. Now the engine runs beautifully. Doesn’t miss a beat. So unsure what was wrong really. Too many changes. I kept all the old stuff in a box inside the bus. He did say the old push rod that came off was a slightly different size than for an angled pump one. I have an alternator so have the angled fuel pump needing a different length. I’m useless with engine tuning and timing. My Dad tried to teach me way back when. But I haven’t got that technical brain.
It’ll be great when we can all get back out there. Thanks for the reply. Fingers crossed you can get out and about later this year.