Engine - Stall/Sag or Hesitation After Cold Start
87chevy02Number: 87-108
Section: 6E
Date: APRIL 1987
Subject: STALL, SAG OR HESITATION AFTER COLD START
Model and Year: 1986-87 CAMARO WITH 2.8L (V.I.N. CODE S) P.F.I.
ENGINE AND 4-SPEED AUTOMATIC TRANSMISSION
TO: ALL CHEVROLET DEALERS
Some 1986-87 Camaros with 2.8L P.F.I. engines and 4-speed automatic transmissions may experience one or more of the following conditions at 40 degrees (F) to 70 degrees (F) ambient temperatures:
^ Stall after cold start.
^ RPM sag or stall when shifting from neutral to drive immediately after cold start.
^ Cold driveaway hesitation.
To service this condition inspect for the following and repair as necessary.
1. Loose or leaking air duct between mass airflow (MAF) sensor and throttle body.
2. Low minimum idle speed. (Specification is 550 plus or minus 50 RPM in drive, automatic transmission.)
3. Openings in the EGR transfer tube.
If the condition persists, check PROM I.D. with scan tool. If the PROM I.D. is not one of the following numbers, replace the PROM with one of the service PROMS listed in the following chart.
Scan tool reading of PROM I.D.: 8419, 8420, 9891, 9901,
9911, 9921
SERVICE PROM APPLICATION
AIR SERVICE
MODEL EMISSIONS CONDITIONING PROM P/N
1986 Camaro Federal Yes 16080006
No 1228419
California Yes 16080011
1987 Camaro Federal Yes/No 16080006
California Yes/No 16080011
NOTICE: The above PROMS are for Camaros with 2.8L port fuel injected engines with 4-speed automatic transmissions.
Use applicable labor time and labor operation numbers.