Spark plug/gap recommendations

[Mustang5L5]

What about a ‘95 5.0?

0.052-0.054”

 

[weendoggy]

Never done/had weed, but anti-sieze is fine if you use it right. Some like to slop it on like a sloppy joe burger, then use an impact gun to tighten. Guess where it goes? Yep, the some's good, more's better doesn't work well with it. I ususally wear out the brush before a bottle so I keep extra cap/brushes around to replace them. Good stuff! The next person who takes the bolt/nut off will thank you, and it might even be you!

 

[Daryl]

I rummaged through the trash can just in time before trash day and fished out one of the old plugs that I replaced. It’s gapped at .042 and the engine was running great. So, I will pull out the new plugs (which I gapped @ .054 and regap to .042, pop them back in and see how she runs!

 

[Mustang5L5]

Why go smaller? If it’s running well at 0.054” without misfire, why not leave it?

With an N/a combo you ideally want to expose more of the spark flame to the air/fuel mix.

 

[ttocs]

I guess the question is can you tell the difference between the two?

 

[Daryl]

That’s the problem: it’s running like crap with the new plugs @ .054, whereas the old ones were gapped @ .042

 

[Daryl]

I guess the question is can you tell the difference between the two?

Night & day

 

[ttocs]

there ya go.

 

[Mustang5L5]

That’s the problem: it’s running like crap with the new plugs @ .054, whereas the old ones were gapped @ .042

Interesting.

Just a thought that it might be worth going over your ignition system just in case. You don’t happen to have an aftermarket coil by any chance?

 

[Daryl]

Yes, a Screamin’ Demon