not firing to the plug

1993 FORD RANGER
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RANROX1015
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I have a 1993 Ranger xlt 4 cylnder 2.3. It is not firing to the plug. I have replaced the computer, ignition coil, control module, crankshaft sensor pcm power relay, fuel pump shutoff switch, what else could it be.

What else can cause this?

Great site btw
May 26, 2012 at 1:51 PM
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