944 Turbo L4-2479cc 2.5L SOHC Turbo (1988)
Rubber lined polyamide fuel lines can be recognized by loose (not crimped) or missing sleeves (Fig. 2 & 3). The sleeves are only used as a stop on the
connectors.
Repairing polyamide fuel lines or connectors is not possible.
Important:
Polyamide fuel lines may not be bent or clamped.
Consequently the return hose on the pressure regulator cannot be clamped to perform a fuel system pressure holding test. The revised test procedure is
below:
New Pressure Holding Test Procedure
Instructions for Building Fuel Pressure with Engine Not Running
4 Cylinder Cars:
Remove DME relay (G5) from relay socket of CEB and bridge terminals 87b and 30.
8 Cylinder Cars:
Remove fuel pump relay (xx) from relay socket of CEB and bridge terminals 87 and 30 to build up fuel pressure.
Specifications
924S, 944, 944S: 3.8 +/- 0.2 bar 944 Turbo and Turbo S: 2.5 +/- 0.2 bar
928 S4 from 1987 Model Year: 3.8 +/- 0.2 bar
Maximum pressure drop on a warm engine:
0.5 bar in 30 minutes.
