bus hard to start

[n5blr]

when our bus is cold the engine will start no problem with the starter only turning over for a short period of time before the engine runs, but when I run it for 20 mile or so and stop the engine e.g. stopping for fuel. I find that the engine takes longer to start and you must pump the throttle to get the engine to start. Has anyone come across this before? there are a few things that might be the problem but before I start changing out lots of different parts I thought I would ask the question here.

 

[yoda]

Check all the basic engine tune and ensure the choke is fully off. Just sounds like hot start problem these engine suffer with,heat soak.I have always found a bit of throttle when cranking the engine from hot and it starts no problem.I think there was a mod for hot start problems, but cannot think what is was at the moment.

 

[Shoddy]

Mine does the same.....the manual actually says keep foot flat to floor on accelerator when starting it hot. I tried it the other day after a 20 mile run and it did actually start faster. Maybe worth trying it out.

 

[n5blr]

Thanks guys, running twin carbs on the engine. I find if I pump the throttle pedal it will eventually start, never really had that problem with my beetle, I thought maybe the fuel was evaporating in the carb bowls or possibly a problem with the battery, but it starts no probs when cold, first kick of the starter.

many thanks for the replys

 

[ozziedog]

I run twin carbs on mine as well, twin 34`s. Mine starts the same hot or cold. Might be worth just double checking your valve clearances because the gaps do close up a little when the engine warms up and that`s part of the design, but if they is just a tad too tight on the clearances when cold,, hey presto when they get warm then the valves ain`t quite closing totally. Some peeps set the clearances a little tighter thinking they are doing a better job and they is being more pernickety, but it don`t quite work like that. Next time you go for a spin, have a listen to how quick you think the motor is turning over when you start at cold, then listen to how fast it turns over when starting it hot, does it `sound` just a little quicker ???? Does it sound like it`s almost starting when it`s hot but not quite catching ??

Ozziedog,,,,,,,,,,,, Good fun these busses int they :lol: :lol:

 

[gvee]

Have a search on this forum for a "hot start relay"

 

[Bod]

Have a search on this forum for a "hot start relay"

We fitted one of these, and Bod starts first time every time - a massive difference!!!