Rodj

Hi From Sydney Australia. I have a 84-85 F160 XLT Lariat HO 351 with the Holley 4 barrel carb. I just had it overhauled, looking for vacuum hookup diagram.
Or failing that, where does the vacuum hose on the accelerator kick down vacuum diaphragm connect to - manifold or Carb? Only diagrams I have found on net are for the EFI models. Any help appreciated. Especially a complete vacuum diagram.

Braggs

The vacuum diagram for your vehicle should be located on the radiator support bracket.

Rodj

Thanks for that, unfortunately whoever had it before had the radiator replaced and all the decals were removed. Main interest is to know where the Vacuum Operated Throttle modulator hose connects. I think it may be to bottom of Carb. However any idea of a source for the full vacuum hose connections on the 351 4 barrel Holley 4801C would be appreciated. Everything I have come across is for the EFI , not the carb model , ( Build date for mine was Nov 84.

Rodj

I fumbled around, and have gotten the truck running, but would like to know if there is anywhere I can get a good description of the entire vacuum system.

Braggs

The vacuum diagram differs for each vehicle. Here's the one for my 1986 351w HO. It might be close to yours (since similar engine setup/years) but it might be slightly different than yours.

PerryB

Kickdown goes to manifold vacuum.

Rodj

Thanks for the help. DO you know where on the manifold the Kickdown decal vacuum attaches? Clearly the Carb model has different connections to the EFI . What hose should be attached to the vacuum outlet on lower left front of carburetor? Motor seemed to race once hot.

Half ton

If your sticker for the vacuum diagram is faded or not readable then queery on line "Youyr year and so forth for vacuum diagram. I found mine that way.

Chris barnett

I have a 88 firebird that I put a motorcraft holley on and its idling way to fast. its on a 305. Is there a big difference in the vaccum lines on a ford or chevy?