cxxm

I found this on my 1984 TA. It was inside the passenger fender next to the battery. It plugs into the harness (green and black wires).

The sticker on it says:
Delco Prod USA
5049038
114 85

The parts guy from the dealership found a picture of it in one of their 86-87 books, but no explanation what it does or is for. He said the motor part number is 22063240 and plastic is 3090327. His guess was that it was some kind of emission part that either blows or sucks air out of the engine compartment.

I hooked it straight up to 12V and turns about the same speed as the first setting on the blow motor the heater. Just blows out a little stream of air.

Any ideas or does anyone else have this on their car?

cxxm

Update...I ran into a retired mechanic the other day. He told me he had seen this fan once before, but it was not inside the fender. He said it was bolted inside the engine compartment on passenger side not to far from the battery. He believed it was installed by the dealers and not the factory. He said a hose attaches to the fan spout and runs to the front of the carburetor to help cool things down to prevent vapor lock. Sound like a reasonable explanation.

redneckjoe

thats what it is.

five7kid

iTrader: (14)

My '86 SC LG4 donor car had one. It had a thermal switch in the heater hose outlet on the water pump. It was only powered when the ignition switch was off.

As I understand it, it was part of a dealer-installed kit if a customer complained of hard starting when hot. Its intent was to blow cool air on the carb fuel bowl when the car was turned off hot.

Technically, it isn't preventing "vapor lock", but "fuel bowl boil-off". Vapor lock is the fuel in the supply line boiling, and preventing liquid fuel from getting to the fuel pump. All 3rd gens had a return line system to help keep the fuel in the supply line cooler, but the real "vapor lock kit" was an electric in-tank pump (also used on most L69's) - with an electric pump immersed in fuel and pressurizing the fuel supply line, the fuel in the line couldn't boil. In conjunction with the return system, the fuel kept cooler.

My donor car didn't appear to have the in-tank electric pump, although I wasn't smart enough to look for it before I had the hulk hauled off. I did use the entire dash and engine compartment wiring system from the donor car, and there was no fuel pump relay.

cxxm

Thanks for the information. I have that sensor on heater hose outlet, but the two prongs that stick out of it are broken off, so its just kind of there. Any idea what the part number is for it? Wondered for years why it is there. I think I have a plugin floating around on top of the engine looking for its home. Now I know.

Have you ever seen any instructions or schematics about it. Just wondered how they wired it up. Might have to trace the wires.

Lastly, I have no intank fuel pump on my L69, but it will start right up on hot starts as long as you only crack the throttle.

HARD START,SURGE/HESITATION HOT FUEL HANDLING PROCEDURE #86-650-101 - (Mar 17, 1986)
VEHICLES AFFECTED: 1983-85 'F' Car With L69 Engines (Engine Code G) and 1983 - Early '86 'F' Cars With LG4 Engines (Engine Code H)

Customer comments of vehicle surge, hesitation, and/or stumbles after the vehicle has reached operating temperature, then parked and restarted, (Hot Soak) may be received. This condition is caused by a large temperature difference between the carburetor fuel bowl and the fuel delivered from the fuel tank. This condition can be eliminated by the installation of an auxiliary blower fan, which reduces the temperature of the fuel bowl during a hot soak. The fan is designed to operate at an engine coolant temperature of 106 DEG C (220 DEG F) and stay operational until the coolant reaches 90 DEG C (195 DEG F). This will maintain a fuel bowl temperature of approximately 74 DEG C (165 DEG F).

Listed below are Hot Fuel Handling service kit part numbers:

P/N Usage --- ----- 14094394 Chevrolet 'F' Cars

14094395 Pontiac 'F' Cars

NOTICE TO DEALER: In each kit there is a one page flyer explaining the blower kit operation. Please insure that the customer receives this flyer.

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