EVAP - Slight Raw Fuel Odor At High Ambient Temperatures

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Bulletin No.: T-92-120
File in Group: 6
Number: 25
Corp. Ref. No.: 216305
Date: July, 1992


SUBJECT:
SLIGHT RAW FUEL ODOR AT HIGH AMBIENT
TEMPERATURES


MODELS AFFECTED:
1992 ELDORADOS AND SEVILLES


Some early production 1992 Eldorados and Sevilles may experience a slight raw fuel odor condition in the passenger compartment. This may occur under certain driving conditions such as hight ambient temperatures with stop-and-go traffic. The Evaporative Emission Control System (EECS) charcoal canister can become saturated with vapor at low speeds and begin to vent underhood vapor through the canister fresh air inlet. Vapors can then be drawn into the passenger compartment by the climate control system.

A vent hose was added to tbe charcoal canister fresh air inlet at VIN breakpoints 605393 (Eldorado) and 808007 (Seville). The vent hose is designed to route vapors away from the climate control system and can be installed on vehicles prior to the above breakpoint.

To correct this condition use the following procedure:





1. Remove dust cap from the charcoal canister fresh air inlet and discard. Refer to Figure 1.





2. Insert vent cap, P/N 8640496, into one end of hose using hose, P/N 9438315, cut to length (24.5" long). Refer to Figure 2.


3. Install open end of hose over the canister fresh air inlet and clamp with a hose clamp, P/N 15620999.

4. Route the hose in/out of fuse panel and attach free end of hose to hole on coolant fan support using clip, P/N 3866187, and screw, P/N 11514845. Refer to Figure 2. (NOTE: Vent cap should be positioned vertically.)

For warranty purposes use Labor Operation T6662 at .2 hour.