Engine vacuum diagram for a 1984 Chevrolet Caprice Classic with a 305 V-8

One of these links should take you to a page containing a schematic showing the routing of the vacuum hoses. Need pictured vacuum diagram for 1983 oldsmobile 307, 5.0 - Fixya

Chevrolet Vacuum Line Diagrams / Chevrolet Blazer And Gmc Jimmy 1969 1982 Vacuum Diagrams Repair Guide Autozone : 305 v8 engine diagram best wiring library 1997 chevy 305 engine diagram vacuum line picsdiagram for 305 w qjet. (scoobydoomemes.blogspot.com)

EGR valve sticking or bad vacuum leak, might be a place to start. I presume the ECM, control module are functioning properly?

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Hey man the best thing i can think of would be to go and pickup the Repair Manual for your car it should have good info on the vacum setup.

You have foru engine sizes there, check the next diagrams...


1990 Chevrolet Caprice 4.3 liter V-6 VIN "Z"




1990 Chevrolet Caprice 5.0 liter V-8 (305)




1990 Chevrolet Caprice 5.0 liter V-8 (307)




1990 Chevrolet Caprice Classic 5.7 liter V-8 VIN "7"




Hope helps with this (remember rated this).

Here ya go! #1 on the cap is the solid white dot...and then it goes clock-wise, 2, then 3 and so on.

The vacuum schematic is printed on a white decal and is supposed to be affixed to the underside of your hood or on your core support(above your radiator).

the vacuum hose should be linked from intake manifold to thebrake booster on brakes as well as to the side of the gearbox onthe vacuum canister. should any one leak there will be a misfire or no vavuum for brakes.

Hope this is what you needed.