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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Brake Vacuum - engine stalling

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Old Jan 16, 2008 | 05:50 AM
  #1  
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Brake Vacuum - engine stalling

My 83 f100 has been off the road for a couple of years and I have just got it re-registered and rebuilt the 600 vac secondaries, put in new points \ condenser etc. It seems to be running ok but is a bit rough in the higher revs. The brake pedal feels spoungy and dosent retract and the brake booster appears to give a hiss every now and then. The rear brakes have just been replaced (shoes and cylinders) but now the rear tyre appears to be locking on sporatically. (I am sure that the wheel cylinders are adjusted correctly). There is no fluid missing from the Master Cylinder. Also when you are driving and apply the brakes firmly the engine stalls. I think it is a leaking Brake booster \ diaphram. I am aware that if there is a vacuum leak in the brakes then the motor will loose vacuum and can cause it to stall.

Has anyone had this problem? I have had a quick check of the hoses etc.

Cheers


MF13
 
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Old Jan 16, 2008 | 05:53 AM
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Sounds like the booster is shot. The rear brakes locking up sounds like the proportioning valve. I also have to ask about the points and condensor????? Ford stopped using those in 1975.
 
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Old Jan 16, 2008 | 11:20 AM
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Yep...I have a bad booster too. Makin' it run like crap, too.
 
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Old Jan 16, 2008 | 12:17 PM
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Mebbe our poster likes points better.

Sounds like a bad brake booster. ALSO, the master cylinder is not that difficult or expensive to replace while the booster is out.
 
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