Hi All. A friend's jeep isn't starting so well, so I suggested she change the plugs, wires, cap, and rotor. However it seems that there is a coil on each plug. Does anyone know what the equivalent operation on the 4.7 is? The Haynes manual is less than complete for the WJ. Also, are there any special tools(besides a spark plug socket) for doing this?
Thanks in advance.
Will
William Pughe did pass the time by typing:
Nothing you need to do, the parts that wear don't exist on that model. Only thing you could replace are the spark plugs.
Poor starting is more likely fuel related than spark. Need to check the fuel rail pressure, should be about 32psi with the engine at idle and remain there for about 1/2 hour after turning the ignition off.
More like 50 psi.
Doh! failure to parse the year. They bumped it up a tad didn't they.
LOL, I figured you weren't exactly paying attention there. It definitely wouldn't be happy with 32 psi. :-)
L.W. (ßill) Hughes III did pass the time by typing:
Interesting. At the tank rather than the rail. Wonder why.
Most are IN the tank on Jeeps now. Have been since about '95. I believe it's to keep from heating the fuel and sending it back to the tank. Less vapor to try to contain.
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