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Re: bomb replacement

If the bomb is bad, you'll only get a few pedal pushes with the engine off
before the pedal goes hard.  You should get at least 20 with a good bomb.
If it flunks that test, replace the bomb, then check your other symptoms.

BTW, I don't see how a bad bomb can allow the pedal to descend to the
floor.  The bomb is assisting boost only, which is why the pedal becomes
very hard in the test I describe.  At that point, the pedal feel is what
you should get even if the bomb is failing with the engine running.

>does anyone know a reliable method of determining if a brake pedal that
>gradually descends to the floor indicates a bad master cylinder or a
>bomb that has lost its nitrogen charge?  I would also like to know if
>anyone out there knows the cheapest source of replacement bombs, I'm
>sure they are available rebuilt somewhere.  I hate to spend $400 at the
>Jeremy Walters
>San Ramon, CA

Richard Funnell,
San Jose, California
'83 urQ
'87 560 SL