Tick Over

[Jeffro]

When an engine is ticking over and it sounds like the buses from years ago i.e. BRMMM.....BRMMM.....BRMMM.....BRMMM.....What is the problem and what is the technical term ? I know the answer but can`t think of it

 

Jeff

[iamORION]

Something to do with the exhaust system perhaps?

[JackRegan]

Is the term you looking for called "Hunting" when the engine speeds up and slows down when at tick over.

[Jeffro]

I think your right Jack, Thank You very much

[Kev_UK]

Yes, it's called "hunting" (At first I was going to say is it a diesel engine.. but the buses made a Carumm carumm carumm sound). Hunting is usualy due to the timing being out (too advanced or retarded).. or the fuel mixture / air screw being out.