Poor Engine Performance

07.1-85011 Poor Engine Performance Engines 617.95 Revised 10/85 1/85

Cause:
Low boost pressure at the boost pressure aneroid caused by soot-in the switch-over valve, boost pressure lines and hollow screws on intake manifold or boost pressure aneroid.

Remedy:
Check, clean or replace parts as required.

Always check boost pressure directly at boost pressure aneroid or at the boost pressure line just behind switch-over valve. If necessary, bypass switchover valve and repeat test.