LOW SPEED TIP-IN/STUMBLE EXCESS CANISTER VAPORS. Pontiac LeMans 1982

For 1990-2009 cars

# LOW SPEED TIP-IN/STUMBLE EXCESS CANISTER VAPORS

#### Subject: LOW SPEED TIP-IN STUMBLE - ALL 1982 FIREBIRDS WITH 5.OL V-8 (VIN CODE H)

When a condition of poor engine performance on light tip-in acceleration is encountered, it may be caused by excess canister vapors entering the induction system. The condition usually occurs at ambient temperatures above 90 F.

The condition can be improved with the installation of a vacuum delay valve (service part number 14020691) in the vacuum hose that runs from the carburetor (port "H") to the canister control valve (vacuum) port.

The following procedure (and sketches on the reverse side) show the correct installation. The existing hose attached to the carburetor at port "H" should be cut 2 1/2" +/- 1/8" from the canister control valve. Install the vacuum delay with the black end toward the carburetor. Remove or shorten remainder of hose, 2 1/2" +/- 1/2", and reconnect existing hose to carburetor.

#### WARRANTY INFORMATION

Labor Operation J6080 Time Allowance .2 Hours

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