Cold Engine

Fig. 18 Pressure Relief Point On The Pressure Gauge:

NOTE: This can only be done on a cold engine.
1. Open tap of the testing apparatus.
2. Disconnect the electrical connector from the control pressure regulator.
3. Place the fuel supply circuit under pressure using the tachymetric relay by-pass harness.
4. Make sure that the cold engine control pressure ranges fall within the curve shown in Fig. 18.
CAUTION: The control pressure regulator incorporates a barometric capsule (altitude corrector). Take this into account when reading the test pressures.
5. If the pressure tested is incorrect, retest with a new control pressure regulator.