Howdie check the fuel filter in the side of the carb when was the fuel pump changed?do you have external fuel filter on the side?check those things.
SOURCE: 1993 gm 454 engine fan belt assembly
Go to www.autozone.com and click on repair info and enter in car info and then click on repair manuals and a manual for your vehicle will come up and it should be listed in that manual. Sometimes the diagram is on the hood of the vehichle rather than on the engine compartment but you probably already looked there... Hope this helps
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SOURCE: ignition timing specs for a 1986 Chevy 454?
Automatic I presume. 8 degrees BTDC @ warm & 700 RPM.
distributor vacuum off & plugged. In drive, & accessories off.
Don't forget parking brake on.
SOURCE: I have 1986 winnebago 454 chev it isn't getting
The mechanic should check the fuel lines or gas hose from the tank going to the carburetor and from carburetor going to the engine. and also check on the first or primary filter ,the secondary filter, the spray nozzle assembly and the carburetor . if there is a dirt it should be cleaned if there is a spare parts that is worn out it should be replace and if there is a corroded parts then clean it also .After it then also check if there is a loose connection of the hose then reconnect the connection of the fuel lines or gas hose should be tighten that it will not spill gas.But still don't forget to check the screws or the bleeder screws of the carburetor check if there is a dirt and if there is a worn out screw's or bleeder screws .if there is then clean it with a clean gas if there is a worn out replace it. the throttle should also be check if it is been stock there fore you have to repair it if worn out already then replace it.If the carburetor is dirty gas can't pass to the engine normally or some times no gas is going to the engine.That is why you should clean it or replace the worn out parts . But then you have also to check the gas that you are using to your car. If the gas is diluted or dirty then it can be the cause of the problem. Change the gas and buy or get a clean gas that is not diluted or dirty because sometimes dirty gas or fuel can give malfunctioning to the carburetor assembly.
SOURCE: do you have the belt diagram for a 1986 454
I can't find anything on a motorhome application, but here is Dayco's chart for the serpentine belt on a 84-90 Surburban with a 454 engine.
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