Checking "Cold" Control Pressure

CHECKING "COLD" CONTROL PRESSURE

This test can only be made on a cold engine. This test is absolutely essential for start or warmup problems.

1. Connect and bleed pressure gage.




2. Pull off 2-pole plugs at mixture control unit and warm-up regulator. and turn on ignition (fuel pumps run).




3. Set control valve at position 2.

4. Refer to diagrams below for nominal pressure according to outside temperature at the moment of testing.

1978-85 Models:

1986-89 Models:

5. Deviations mean a defect in the warm-up regulator. which must be replaced.