spdrcr

I have a 1996 grand cherokee with a 4.0. Yesterday I changed the plugs and air filter. Now when i start it cold i have a slight miss, after a couple minutes of driving or idle it clears up and runs great. Any ideas??

tiwvr1

what plugs did u put in, and did u change wires?

spdrcr

ac double platinum, gap .035 I didnt change wires it has oem wires.

tiwvr1

Hate to tell u this, but change the plugs out to copper core, for some reason these jeeps do not like platium, and change the wires. You could just try the wires for now, but I have heard of the plat causing a miss.

spdrcr

WOW, i was skeptical about the platinum plugs being the issue, I changed them to copper core and no more miss.

Thanks for the help

nukinfuts29

Welcome to the forum!

A lot of us learned this lesson the same way you did. Glad it is all fixed up