Cutlass Ciera FWD V6-260 4.3L DSL (1982)
Fuel Injector: All Technical Service Bulletins
Diesel Engines - Rough Idle, Smoke, Reduced Performance
SUBJECT
DIESEL ENGINES WITH PLUGGED NOZZLES
NUMBER: 83-T-26
DATE:
March 11, 1985
MODELS/YEARS
1980-83 MODELS EQUIPPED WITH 4.3L
SECTION: 6C
V-6 OR 5.7L V-8 DIESEL ENGINES
Diesel injection poppet type nozzles on some 1980-83 models may become plugged with carbon to the point where performance may be affected. This
may show up as a rough idle, smoke, reduced performance, loss of fuel economy, etc. Poppet nozzles used on 1984-85 models are of a semiguided
design and have not shown a tendency to plug.
The plugging condition can be greatly reduced if not eliminated with the addition of DEXRON (R) II automatic transmission fluid to the diesel fuel. Add
two quarts of DEXRON (R) II automatic transmission fluid to the fuel tank, then fill with diesel fuel.
Advise the customer to drive the vehicle until the fuel level is less than 1/4 tank before adding additional diesel fuel. Do not add additional transmission
fluid. If carbon accumulation was responsible for the driveability condition, this procedure should correct it. If the condition is not corrected, additional
quantities of transmission fluid will not correct the condition. Refer to the "Diesel Injection Nozzle Testing" procedure and/or the "Diesel Engine
Diagnosis" section in the appropriate chassis service manual.
