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1978-79 Models

  1. Connect pressure gauge and valve assembly as in cold engine control pressure test. Start and run engine until it reaches normal operating temperature. Turn engine off and after 10-20 minute periods, record gauge readings. Pressures should be as specified in LEAK TEST GAUGE READINGS table.
  2. If pressure is not maintained after 20 minutes, check for defective "O" ring in pressure regulating valve of fuel distributor. Also check for leaks at fuel pump check valve, cold start valve, control pressure regulator, or accumulator.
LEAK TEST GAUGE READINGS

Application psi (kg/cm2 ) After 10 Min. psi (kg/cm2 ) After 20 Min.
924 24.7(1.7) 21.7(1.5)
928 24.6(1.7) 21.7(1.5)
911SC (1) (1)
930 Turbo 24.1(1.7) 21.3(1.4)
(1) Information not available from manufacturer