TM 10-3930-669-34 6.  ENGINE RUNS ROUGH OR MISFIRES (CONT). KNOWN INFO Injection pump OK. POSSIBLE PROBLEMS Injection pump timing incorrect. Low engine compression. Cylinder head(s) or gasket(s) faulty. Camshaft faulty. TEST OPTIONS Injection pump timing check. REASON FOR QUESTION If injection pump timing is faulty, engine will run rough or misfire. Adjust injection (Para 4-4).  Go to Step 6 of this Fault WARNING Read WARNING on Page 2-55 2-54

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