EXPERTEC TSB (1-83)

WARNING: This page is about the Forward Control 4.8 T, Automatic, 400/M40, which is a different variant/trim than selected.

Publication date: 1983-06-16
Reference number: 1-83

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

Reference Number(s): 1-83, Date of Issue: 06/16/83

DIESEL HARD START,EXCESS SMOKE - RESTRICTED FUEL SUPPLY

Model(s): All Models

Bulletin No.: Chevrolet 83-I-4, GMC 1-83

Date: 06/16/1983

SERVICE INFORMATION

POOR STARTING (GOOD CRANKING SPEED BUT LIMITED IGNITION) AND EXCESSIVE SMOKE AFTER START UP CAN BE THE RESULT OF A RESTRICTED FUEL SUPPLY. THIS CAN BE MISDIAGNOSED AS A GLOW PLUG SYSTEM CONDITION. THIS RESTRICTION MOST LIKELY WILL BE FROM A PLUGGED FUEL FILTER BUT CAN ALSO BE CAUSED BY A PINCHED OR KINKED FUEL LINE. AFTER THE ENGINE WARMS UP, IT GENERALLY WILL RUN SATISFACTORILY. IF THE RESTRICTION GETS PROGRESSIVELY WORSE, TOP SPEED AND PERFORMANCE WILL BE AFFECTED ALSO. EVEN THOUGH THE FILTERS MAY HAVE RELATIVELY FEW MILES, PURCHASE OF DIRTY FUEL CAN PLUG THE FILTERS IN A SHORT TIME. A CHECK OF THE FUEL LINES FOR RESTRICTIONS SHOULD ALSO BE MADE.