Question about Jeep Grand Cherokee

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My 98 jeep grand cheokee runs rough all of a sudden and misses at all rpm ranges p0304 comes up i just replaced the wires and rotor and cap and coil about a month ago plugs are older but e3

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I don't know about a 1998, but i do know that E3 plugs
will not work at all in newer vehicles.

I have to ask. Why would you even try them?
I never believe any advertising or find it necessary
to use anything other than what a car maker recommends.
If you do your asking for trouble.

I would check for vacuum leaks & forget that one cylinder
misfire. If you had COP Coils then you replace that one
but you don't

Loose the plugs

Posted on May 24, 2011

  • Anonymous May 24, 2011

    EGR Valve ?

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