1994 Chev Suburban Hesitating - Engine

Question: I have a 454 engine that has a miss. The rpm gauge jumps up and down. I have replaced spark plugs, spark plug wires, fuel pump, fuel filter, distributor cap & rotor, did compression check, checked egr & pcv valve. The engine light does not come on. The engine just has a miss during idle and at cruising speed. It seems like it is an electrical problem but I don't know where to go from here?

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Technican: What was the compression, I assume good and uniform. Is this a constant miss? The first thing to check is for spark at all cylinders, preferably using a spark tester. The next thing to check is the fuel injectors. Disconnect the injector electrical connector one by one noting which cylinder(s) are unaffected. This will indicate which injectors are at fault. Remember, we need good spark and compression before we can isolate the fuel injector. Also play close attention to the wiring and injector connector- any problem here will obviously cause a dead cylinder.

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