Quantcast ERRATIC IDLE SPEED.

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TM 9-2815-226-34-1
Table 2-1. TROUBLESHOOTING PROCEDURES (Cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
15.
ERRATIC IDLE SPEED.
Step 1.
Check for leaks in supply (suction) fuel lines to pump.
Tighten all line connectors.
Step 2.
Check for binding or hanging-up throttle input linkage.
Lubricate or repair as necessary (LO 9-2320-281-12 and TM 9-2320-281-20).
Step 3.
Check for blown or leaking head gasket(s).
a. Retorque head bolts (table 3-3).
b. Replace defective gasket(s) (para 3-6 and 3-94).
Step 4.
Check for defective or miscalibrated fuel pump (excessive throttle leakage).
Test and calibrate pump (para 3-84).
16.
ENGINE DIES.
Step 1.
Check for defective fuel pump shutoff valve.
Perform steps 2a thru 2f of MALFUNCTION 2 to determine status of shutoff valve.
Step 2.
Check for leaks in supply (suction) lines to fuel pump.
Tighten all line connectors.
Step 3.
Check for fuel blockage in engine fuel lines.
Purge all lines.
Step 4.
Check for external fuel leaks.
Repair as necessary.
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