Firebird V8-305 5.0L (1982)
Evaporative Emission Control Canister: Customer Interest
Engine - Hesitation on Light Acceleration
Number:
86-6 (Gasoline)-74 Date: 6/87
Subject:
DRIVEABILITY - WARM HESITATION
1982-86 PASSENGER LG4 5.0L (ENGINE CODE H)
1984-86 PASSENGER L69 5.0L (ENGINE CODE G)
Some vehicles with the above engines may experience a hesitation on a light acceleration. This hesitation is normally seen after an extended idle or a
short hot soak in higher ambient temperatures. This condition could be caused by excessive fuel vapor entering the engine through the canister purge
system. To determine if the hesitation is from the purge system the following test should be performed:
1.
Vehicle should be at normal operating temperature.
2.
On 1982-85 models plug canister purge at Y connector in crankcase vent line. On 1986 models plug canister purge at carburetor.
3.
Test Drive Vehicle;
A.
Hesitation still present, look for other reasons for hesitation (accelerator pump, timing, etc.).
B.
Hesitation no longer present, install fuel vapor canister control kit, P/N 10077501 per instruction in kit.
4.
Reconnect purge system.
Warranty Information:
Labor Operation:
T1200
Labor Time :
.5 Hours
