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Engine Flat spot
Posted: Tue Aug 27, 2013 10:25 am
by martinformorris
Hi I seem to have a flat spot after I start my car. It start ok but when I press the accelerator there seems to be a flat spot. I have checked the valve clearances and they are ok, oil in the piston damper is ok as well. So what should I check next?
Thanks
Re: Engine Flat spot
Posted: Tue Aug 27, 2013 1:58 pm
by mike.perry
Check carb piston rises and falls smoothly onto bridge
Check mixture setting
Re: Engine Flat spot
Posted: Tue Aug 27, 2013 3:15 pm
by bmcecosse
Is the 'flat spot' only there when you start the car - with cold engine? Is it still there when the engine is fully warm? I suggest you check the vacuum advance - suck the pipe - do you see the baseplate in the dizzy moving back and forth as you suck/release?
Re: Engine Flat spot
Posted: Tue Aug 27, 2013 6:27 pm
by JOWETTJAVELIN
My money is on the choke either not being pulled out for long enough or it has fallen out of adjustment.
Re: Engine Flat spot
Posted: Tue Aug 27, 2013 10:11 pm
by liammonty
Check the points gap too - they might have closed up.