What Pelle said. Before changing the booster because it MAY be bad, isolate it. Either put a vacumn pump/gauge directly on the booster or plug it and see if it runs OK.
The swap is reasonably straight forward. You can disconnect the M/C from it without breaking the hydraulic lines. You need to make sure that when you reconnect the push rod on the brake pedal arm that you put it in the same hole.
Also its been several years, but when I replaced the booster I found that it was about the same price to buy a booster with M/C. Now I have a spare M/C.
On 10/12/05, Pelle Andersson <[EMAIL PROTECTED]> wrote:
Plug the vacuum hose that goes to the brake booster to see if it makes a
difference?
At sudden pwerful takeoffs the distributor might rotate a bit if you haven't
tighten
it enough and the felt gaskets sometimes used can get thinner over time
making it
possible for the dist to rotate.
Best Regards Pelle
>From: "John Nasta" < [EMAIL PROTECTED]>
>Reply-To: The Chevelle Mailing List <Chevelle-list@chevelles.net>
>To: "The Chevelle Mailing List" < Chevelle-list@chevelles.net>
>Subject: [Chevelle-list] suddenly running really bad
>Date: Tue, 11 Oct 2005 23:48:03 -0400
>
>On my way home today my engine suddenly started running really bad. In
>fact,
>the only way to keep it running is to leave the choke on so that it's on
>fast idle. Putting it into gear immediately sucks power away and with my
>foot on the brake on the brake it can stall, even at fast idle. My first
>guess is that it's a massive vacuum leak. Can a blown brake booster cause
>that? The booster & master cylinder are among the few things that I haven't
>changed, and I know the booster uses vacuum.
>
>It was getting dark as I got home so I just parked it for the night and
>will
>look at it tomorrow in the daylight. It was running great all day and this
>first became noticeable at a stop light about a mile from home. I had to
>keep popping it into neutral and revving the gas at lights to keep it
>running. At the light before that I had done a pretty strong takeoff to get
>ahead of another guy, but I doubt that that has anything to do with it. As
>I
>pulled up to the curb to park, it stalled out. The brake pedal feels really
>hard like it does when the engine dies and you no longer have the power
>assist. The pedal also seems to make a different squeak then I've ever
>heard
>before when I step on it. So, any chance it could have to do w/ a vacuum
>leak because of a ruptured booster diaphragm?
>
>Any advice is appreciated. The first thing I plan to do is check all the
>vacuum lines. This is a 1969 El Camino w/ a 1958 283 w/ HEI.
>
>Thanks,
>John Nasta
>
>
>
>
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Rick Schaefer
72 TPI El Camino
