Engine - Poor Idle Stability/Tip-In Hesitation

88chevy05

Number: 87-278-6E

Section: 6E
Date: MARCH, 1988
Subject: ENGINE DRIVEABILITY (IDLE STABILITY, TIP-IN HESITATION)


Model and Year: 1987 CORVETTE EQUIPPED

WITH MANUAL TRANSMISSION
TO: ALL CHEVROLET DEALERS


New service PROMS, referred to as MEMCALS in the shop manual, have been released for 1987 Corvettes equipped with manual transmissions.

These PROMs will address comments of poor idle stability with a cold engine and tip-in hesitation during warmup.

If normal engine diagnostics are unsuccessful in repairing one or both of the above conditions, the PROM should be replaced with the appropriate PROM from the table below:

Vehicle Model Transmission Service PROM P/N

Corvette Coupe MK2 16074756

Corvette Coupe MH5 16074762

Corvette Convertible MK2 16074805

Corvette Convertible MH5 16074800

Calloway/Export MK2 16074820

Use applicable Labor Time and Operation Number.