Re: Late ignition. Timing

Posted by Fish'n Jim On 2022/11/9 12:10:24

I thought about this yesterday but already had too many items for the available info, but a simple inspection of the tailpipe, for black and/or soot will tell if it's intake restricted, aka, running rich. That'll usually back into the plugs getting sooted, too. They get conductive and don't spark cleanly. Sometimes it'll burn off and sometime it stays, if too rich, needing attention, but that's usually more a lag or sluggishness than mid range acceleration/power issue. Could be just how the problem was described or who knows what was done or not done at the shop?
But this is why we used to do tune-ups, because they didn't run good forever in that period like they do now.