byoungblood

It isn't so much that it is snuffed out, but it fails to fire at all. Increased cylinder pressure requires a higher voltage to arc, as does a larger gap. So short of increasing the primary voltage or finding a hotter aftermarket coil (and good luck finding a good quality aftermarket COP) adjusting the gap to a point where the factory system can still function is the only option.

alpo

A much better description, thank you.

MadocHandyman

So, could this be a possible reason why some 5.0's are experiencing a shudder as well? Their gaps are off also?
Should we point it out or keep it to ourselves and let them figure it out? ;-)

57hippie

I wish I had ckeck my plugs sooner. Since I have change plug gap no more shudder or misfire when I hammer it.

Mr_Snips

Just did mine today. they ranged from .025 all the way up to .042...havent driven it since but it did seem to idle smoother. hopefully gas mileage improves.

CoreyMS

WOW WTF. Seem to idle smoother? I'd say so.

alpo

I can't believe the variations of something that is so easy to do correctly. Someone at Ford needs to have their *** kicked. When the weather cools down a little I'm going to check mine.

MadocHandyman

Wow!
So did you have any power loss issues and the 55 shudder?

MadocHandyman

You had asked in the 5* thread about gap with tuners. Most are running .030

alpo

Hedging my bets....

Is there any rationale behind .030? I like to run the gap as big as practical.