CPI - Fuel Leak May Cause Driveability Problems

Number: 93-99-6C

Section: 6C

Date: FEB. 1993

Corporate Bulletin No.: 266306

ASE No.: A1, A8

Subject:
CENTER PORT FUEL INJECTION (CPI) LINE CLIPS INFORMATION

Model and Year:
1992-93 S/T AND M/L TRUCKS WITH 4.3L ENGINE (RPO 135)

Improper installation of the fuel line clips which hold the fuel inlet and outlet tubes to the Central Port Fuel Injection (CPI) unit may result in an internal CPI fuel leak. A fuel leak may cause driveability problems or in extreme cases, hydrolock.

Proper Removal and Installation of Fuel Line Clips

Removal:





Using needle nose pliers, firmly grasp the fuel fitting clip as shown in Figure 1 and pull the clip straight back from the fuel meter body. It may be necessary to lift the opposite side of the clip with a screwdriver. Discard the clip.

Installation:
Always use a new clip and O-rings (P/N 17112702). Using your fingers as shown in Figure 2, slide the clip over the fuel meter body making sure that the clip properly engages the slots in the fuel inlet and outlet tubes and that the clip is properly positioned over the fuel meter body on both the top and bottom sides. The clip will be properly positioned when the flanges on the fuel meter body protrude from the clip and the clip snaps in place.

IMPORTANT:
Do not install the clip from the bottom-up position, the clip will not properly retain the fuel lines. Install the clip from the top-down position as shown in Figure 2. Secondly, it is important to note that the fuel lines MUST be in the correct inlet/outlet openings (The lines will fit either opening). Lastly, the fuel lines MUST be correctly seated into the TBI body to allow for proper installation of the clips.

Parts Information:
Part Number - 17112702 Description - Seal Kit

Parts are currently available from GMSPO.