Caprice Wagon V8-350 5.7L (1994)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
Engine Controls - Steady State Surge 45 to 65 MPH
Group Ref.: 6E - Engine Fuel & Emission
Bulletin No.: 476515
Date: August, 1994
SUBJECT:
STEADY STATE SURGE 45 TO 55 MPH (NEW CALIBRATION)
MODELS:
1994 BUICK ROADMASTER
1994 CADILLAC FLEETWOOD
1994 CHEVROLET CAPRICE AND IMPALA SS WITH 5.7L ENGINE (VIN P - RPO LT1)
CONDITION:
Vehicles built from start of production through May 10, 1994 (see VIN breakpoints listed) may exhibit an engine surge condition between 45 and 55
MPH when ambient temperatures are at 30~F or colder under the following condition:
The engine is cool but in closed-loop operation. The condition disappears when the engine is fully warmed up.
CAUSE:
The calibration was not optimized for this specific engine operating condition.
CORRECTION:
New calibrations have been released to improve this condition.
PART INFORMATION:
New calibrations are available and listed on the April 1994 CD ROM (VO32.061) for these vehicles:
WARRANTY INFORMATION:
For vehicles repaired under warranty:
Labor Operation
Labor Time
J6355
Use published labor time.
