I took the car out of the storage for a little fun on sunday, Found a quiet back street and proceeded to smoke my way down the street. Alot of fun untill I tried to slow the car down and found I had NO power assist on the brakes. It started to come back after a few seconds , and I damn near put myself through the wingshield because I was pushing the daylights out of the brake pedal. Very wierd expierence, that I would rather not go through again. Anyone ever expierenced this before, and have any suggestions on a possible problem? Thanks, Mark
Look at the check valve where the hose goes into the booster. If it goes bad the booster will not hold vacuum. Then there is the possibility that the booster itself is leaking.
Thanks, I'll look there first. Should mention the booster is a new Delco ( we all know Delco parts NEVER fail) Either way good advise :TU: Mark
Check for a loose or disconnected hose at the trans vacuum modulater. I had one come off there due to a leak at the trans dipstick tube. Depending on how old they are and if you run them, the rubber carb vacuum bib plugs deteriorate and the ends pop off creating a vacuum leak. A couple of in-the-car trouble shooting gauges I like to run are: A vacuum gauge, it will tell you a lot of things once you learn how to translate it. Major vacuum leaks usually show up as a zero or very low figure on the gauge. The other gauge, a fuel pressure gauge. (Be sure to run a fuel pressure isolater in the line.) Mfg. recommend using mineral oil in the line from isolater to gauge, but I find ATF works fine. I believe S-W makes an electric fuel pressure gauge and that would negate the requirement to run a pressure isolater.
Check hose from manifold to booster as well as fitting in manifold for cracks. You might have cracked a hose or something when romping on it (motor flexing). :3gears: Also check carb,manifold and head gaskets by spraying them with WD40 or other and note if engine speed changes. Bill
