INFORMATION ON NORMAL 4.6L NORTHSTAR ENGINE. Cadillac Concours 1995

For 1990-2009 cars

# INFORMATION ON NORMAL 4.6L NORTHSTAR ENGINE

REVISION: 06/13/95

#### THIS BULLETIN IS BEING REVISED TO ADD THE OLDSMOBILE AURORA.

REVISION: 06/28/95

#### THIS BULLETIN IS BEING REVISED TO ADD THE 1996 MODEL YEAR.

REVISION: 08/14/95

THIS BULLETIN IS BEING REVISED TO CLARIFY F.I.S. ACRONYM IN SUBJECT AND TEXT. ----------------------------------------------------------------------

#### SUBJECT: INFORMATION ON NORMAL 4.6L NORTHSTAR AND 4.0L ENGINE CRANKING TIME/BUMP START/F.I.S. (FLUID INDUCTION SYSTEM/ INTAKE MANIFOLD) PRESSURE RELIEF NOISE

#### MODELS: 1995-96 CADILLAC CONCOURS, ELDORADO, SEVILLE WITH 4.6L NORTHSTAR ENGINE (VINS 9, Y - RPOS L37, LD8)

1995-96 OLDSMOBILE AURORA WITH 4.0L ENGINE (VIN C - RPO L47)

SOME OWNERS MAY COMMENT ON A POP NOISE DURING CRANKING BEFORE THE ENGINE STARTS. THE CUSTOMER SHOULD BE MADE AWARE THAT IF THE ENGINE DOESN'T START WHILE CRANKING AND THE KEY IS RELEASED (TURNED BACK FROM THE START POSITION/OR BUMP STARTED) WITHIN 2 SECONDS, PRESSURE RELIEF FROM THE F.I.S. (FLUID INDUCTION SYSTEM/INTAKE MANIFOLD) MAY OCCUR AND IS CONSIDERED NORMAL.

IF THE CRANKING TIME EXCEEDS TWO SECONDS AND THE ENGINE DOES NOT START, THIS EXTENDED CRANKING MAY BE CAUSED BY A FUEL SYSTEM LEAKDOWN CONDITION. REFER TO BULLETIN 476307 FOR ADDITIONAL INFORMATION AND DIAGNOSIS.

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GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

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