1986 Ford e150 - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

Toadman69 · 06-12-2009, 08:20

Having a problem with my van I believe its a vacuum issue but not familiar with the vacuum system. So I would like ask you all if ya got any ideas.
Here is the problem its a 302fi engine and I got stalling, loss of brake power, and shifting problems I know there has got to be a central part where all the vacuum starts. Any Ideas ??? ty

**jwko** · 06-12-2009, 09:08

I would start at the intake manifold and trace from there. If it's that big of a leak where you would lose the power brakes, you ought to be able to easily hear it sucking.

The vacuum originates from the intake.

**360ci** · 06-14-2009, 07:32

There should be a vacuum line junction around the brake booster as well. As jwko mentioned, providing the engine/exhaust isn't too loud, you should be able to hear a 'hiss' sound from a broken line.

Toadman69 · 06-14-2009, 19:43

I dont really hear a hissing sound but there is a round unit with hoses and if I remove one the vehicle seems to run better could this round unit be my problem ? or is it pretty much safe and one of the hoses is not sucking...not sure first time I have ever messed with vacuum..

**360ci** · 06-15-2009, 15:54

Round unit - I believe you speak of the brake booster? I've never seen under the hood of an '86....

Toadman69 · 06-15-2009, 18:00

Not the Brake booster its a plastic round unit that has 5 vacuum lines attached to it one in back two upfront one on the left side and one underneath its like a master vacuum point.

**360ci** · 06-15-2009, 18:43

Perhaps upgrading to a Dyson might help, as it never loses suction? Had to say it! Perhaps someone else will chime in to give you a hand.

**jwko** · 06-15-2009, 21:44

Quote:

Perhaps upgrading to a Dyson might help, as it never loses suction?