Re: question about engine losing power

Posted by Owen_Dyneto On 2017/6/15 11:05:35

With no diagnostics done or reported, we're just throwing a handful of corn at the barn door. But if the problem is within the distributor it's far more likely to be the centrifugal advance and not the vacuum advance. And failures of the mechanical advance are very uncommon. Put your timing light on and just rev the engine from an idle up to some higher speed - if the timing changes I think you can look elsewhere for the problem. My inclination is that it's fuel related so the next diagnostic I'd do is fuel pump delivery (volume and pressure) and of course check any rubber sections of the fuel line, especially those on the suction side.

But before that, check the fuel filters as others have already suggested and don't forget that many mechanical pumps have a fine mesh brass screen above the fuel bowl, and likewise many carburetors have their needle and seat protected by a similar mesh screen at the fuel inlet.