Fuel System Pressure and Internal Leakage Test

Test Data:

Special Tools:

NOTE: In case of complaints about engine hesitation during full load operation, the fuel pump delivery quantity should be checked (see Fuel Pump Delivery Test).

Test Condition:
- The ignition system must be in good working order. The idle speed must be within specifications.

Test Page 1:

Fig. 1:

Fig. 2:

Test Page 2:

Test Page 3:

Connecting Pressure Gauge

Pressure gauge 1st version:

Connection 1 at fuel distributor lower chamber
Connection 2 at pressure gauge
Connection 3 at cold-start valve (fuel distributor upper chamber)

Pressure gauge 2nd version:

Connection A at fuel distributor lower chamber
Connection B at cold-start valve (fuel distributor upper chamber)

Fig. 3:

Fig. 4:

Test 4th Page:

Test Page 5:

Test Page 6:

Fig. 5: