Engine - No Start When Parked On Incline
Bulletin 87-6E-12Date Mar. '87
Ref. No. 87-086-6E
Corp. Ref. No. 736303
SUBJECT: ENGINE MAY NOT START WHEN CAR IS PARKED ON INCLINE
MODELS AFFECTED: 1985-87 CENTURYS WITH 3.8L PFI ENGINES (VIN CODE 3)
1987 CENTURYS WITH THE 2.8L MPFI ENGINE (VIN CODE W)
Some 1985-87 Centurys equipped with either 2.8L MPFI or 3.8L MPFI or SFI V-6 engines, may exhibit a no-start condition when parked in a nose down altitude of greater than 15 degrees with less than a quarter tank of fuel.
This condition may be caused by air/fuel vapor ingestion through the vapor rejection port of the fuel pump resulting in fuel starvation.
Vehicles exhibiting this condition may be repaired by installation of an in-tank fuel pump that incorporates usage of a vapor rejection port with an umbrella check valve.
Service kits which include pumps with this feature, are noted below by applicable model year and are available from GMSPO.
MODEL YEAR PART NUMBER
1985-86 25115689
1987 Coupes/Sedans 25115465
(Wagons are not involved)
WARRANTY INFORMATION
Labor Operation Number: T5138
Labor Time: 0.9 Hours
Trouble Code: 92