1988 Ford Bronco Brake Booster

CAPTAINBADJAM

MEMBER
1988 FORD BRONCO
6 CYL
2WD
AUTOMATIC
13,000 MILES

Brakes locked up (Rear). After truck cooled down we were able to drive it (4) mile home. Inspection reveals the BRAKE VACUME BOOSTER was half full of gasoline. All the locals are scatching heads & saying "that ain't possible". Well the proof is in the garage.

Any ideas?

2 Replies

BILLYMAC

MECHANIC
2,204 POSTS

Hi yes it is possible if you have a leaky injector. Or bad orings on injectoreverytime you flood the eng a small amount of gas will be sucked in through man vac. Replace the booster replace inj orings flush brake system prob should go away billymac

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Friday, January 16th, 2009 AT 4:50 PM

CAPTAINBADJAM

MEMBER
2 POSTS

I pulled the fuel injector rail and all 6 injectors. There was no problem with the injectors, coils or "O" Rings. However I did find a ruptured diaphram on the fuel pressure regulator, (confirmed by use of a vacume pump). Can't explain why it ran so good but the entire vacume system was drawing gasoline from this one source. The booster was just the largest container in the system, so it showed up there. A lot of head ache and $200.00 +/- (parts) later the Ford lives. Thanks goes to everyone who scratched thier head. This was a unique problem, yet so simple. The moto here is, Every problem has an answer, some are just harder to find.
CBJ

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Saturday, January 17th, 2009 AT 7:49 PM