my 2000 4cyl ideals rough
my neighbor hooked up the computer and it said number 4 cylinder misfired. we have changed the plugs, wires and lifter gasket. could it be the coil pack or something else.
It could be a bad injector. Either an open coil or the nozzle plugged. Remove the electrical connector and read the ohms across the coil - it should be around 12 ohms and steady. If it is a lot higher and rising, the coil is open. If you replace the injector, use a new O ring on the fuel rail unless you like doing the job twice.
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