1978 Pontiac Bonneville needs more brake vacuum?

Asked by Norri171 Jun 05, 2014 at 08:24 PM about the 1978 Pontiac Bonneville

Question type: Maintenance & Repair

Okay. So I'm fixing up this 78
Bonneville and the thing is, it's been
sitting because of a problem no one
wanted to fix about 10 years back.
My uncle switched engines and
dropped a 400 hp 6.6 L engine in it.
The problem is...the brake booster
doesnt have enough vacuum in it to
stop the car...it has about 6 lbs and I
need somewhere above 11 lbs...how
can i increase vacuum? Thanks!

1 Answer

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