Fuel - Cleaning Injection Nozzles
85cadillac02Bulletin No. T 85-63 File in Group 6C
Number 97
Corp. Ref. No. 8035771
Date March '85
SUBJECT: DIESEL ENGINES WITH PLUGGED NOZZLES
MODELS AFFECTED: 1980-1983 DEVILLES, FLEETWOOD BROUGHAMS, ELDORADOS, AND SEVILLES
Diesel injection poppet type nozzles on some 1980-1983 models may become plugged with carbon to the point where performance may be altered (e.g., a rough idle, smoke, reduced performance, loss of fuel economy, etc.).
Poppet nozzles used on 1984-1985 models are of semi-guided design, and are not affected by this bulletin.
The plugging may be repaired by adding 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 plugging was responsible for an altered performance condition, this procedure should correct it. If the condition is not corrected, additional quantities of transmission fluid will not correct condition and further diagnosis should be performed. Refer to the Diesel Engine Diagnosis Section of the appropriate Service Information Manual.