BroncoII4x4.com

So of course the dumbass Haynes manual A) doesn't tell you how to change them and B) doesn't tell what to use and C) doesn't tell you what the gap should be.

I'm about to order some and I notice they are gapped at .44 and .40

What is the best spark plug to purchase and at what gap?

The Bosch platinum spark plug has good reviews and is gapped at .44
The Denso platinum TT spark plug has good reviews and is gapped at .40

Both are listed as "guaranteed fit for the 90 Bronco II"

Ok so the OWNER'S MANUAL suggests Motorcraft OE plugs with a .44 gap

Is it worth it to "upgrade" the plugs?

ok goin with the Bosch plugs since they are gapped at .44

I know you can adjust the gap - but I don't want to mess with anything.

picked up the spark plugs - they are gapped at around .30

changed the plugs and wires today.

Didn't change the gap on the plugs.

Used the ACCEL blue spark plug wires. Man you have to put those things together WTF lol, like literally put the metal connector in the rubber elbow then slide wire in - lol crazy...kicked me and my friend's ass for a while till we figured it out. Woulda been nice if directions were in the box.

Thanks for the help