QUICK question: What part # champion plugs?

T

truckeejeeper

NAXJA Forum User

Location

Northern California

• Sep 22, 2016

• #1

Looking for new plugs for the 1991 4.0HO, Stock. I've read champs are the best, but there are many different kinds that fit the Jeep. Which ones???

Champs RC12LYC (412)
Champs RC12PEC5 (3034)
Champs 3412
Champs RN14YC (405)

???

 

S

Sidewinder CC

NAXJA Forum User

Location

Canton, Michigan

• Sep 23, 2016

• #2

Spark plug application chart and tech tip from Chrysler.

.

 

T

truckeejeeper

NAXJA Forum User

Location

Northern California

• Sep 25, 2016

• #3

Awesome reply thx! FYI - I put the RC12LYC (412)'s in my 1991 4.0 5sp. My god what a difference she is purring like a kitten. Smoothed out all the hesitation/rough idle/acceleration. Highly recommended.

 

Saudade

NAXJA Member

NAXJA Member

Location

SoCal

• Sep 25, 2016

• #4

What was in there before? What did they look like?