Engine - Sags/Hesitation/Rough Idle
87olds7SUBJECT: POOR COLD DRIVEABILITY, ENGINE DOES NOT STAY RUNNING ON INITIAL COLD START, OR INTERMITTENTLY WILL NOT STAY RUNNING ON DECEL
SOME 1986 AND 1987 CALAIS AND SOME
MODELS/YEARS: 1986 DELTA 88's EQUIPPED WITH 3.0L MFI
ENGINES (VIN CODE L)
NUMBER: 87-T-40A
DATE: October 23, 1987
SECTION: 6E
This bulletin supersedes Dealer Technical Bulletin 87-T-40 which should be discarded.
Some 1986 and 1987 Calais and some 1986 Delta 88's equipped with a 3.0L MFI engine (VIN Code L) may experience one or more of the following conditions:
^ Poor cold driveability (tip-in sags, hesitations, rough idle).
^ Will not stay running on the initial start when the engine is cold (with proper fuel pressure and no leak down).
^ Engine intermittently will not stay running on decel or during parking lot maneuvers, under closed throttle conditions.
If any of these conditions are experienced on a vehicle when the basic engine, controls, and systems are performing properly, and the vehicles cannot be repaired by using currently published service and diagnostic procedures, it may be necessary to install a new service PROM.
These PROM's are currently available through General Motors Service Parts Operation (GMSPO) under the following part numbers:
Axle Sales Code Scanner PROM I.D.
Model I. D. Located On If This PROM Service
Application Axle Deck Lid Decal Is Installed Part No.
1987 Calais 2.53 F16 1294 16081263
1987 Calais 2.84 F17 1304 16081268
1986 Calais All N/A 8590 1228590
1986 Delta 88 All N/A 8589 16088725