Quote:
Originally Posted by NKYJEEPSTER
what kind of spark plugs are in it?? Is it a 6cylinder? Certain brands of spark plugs can make the wrangler 4.0 run very bad. Sounds dumb but it happened to friends jeep, took it to the dealer and they changed out his plugs and put the right ones in.
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I'm the friend... I had Platnium plugs in mine and it would backfire, spit, sputter unless you really got into it. Pedal on the floor it would run like a champ. I exhausted everything I knew and took it to the dealer... Thought oh boy here we go when they told me use the cheapest plugs you can find. Total bill was under 100.