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Question:

I have a problem with a 1978 Chevy Corvettes brake system. I cant figure out why it wont stop?

I have a 1978 Chevy Corvette, I replaced the master cylinder, booster, calipers, brake pads, and rotors, and bleed the system 20 times, has new fluid, and each caliper is getting good fluid flow, and absolutly no leaks. The brake pedal feels good but it doesnt want to stop, stand on the brake pedal and doesnt lock up. There is no air in the system. Does anyone have any ideas on what else it can be? The only other thing I can think of is the Brake Booster I bought is bad. It was a re-man unit from the auto parts store.

Answer:

Official GM brake booster test is very simple. Start car, let idle for about 3 minutes without touching the brakes. Turn vehicle off again without touching brakes. Wait approximately 45 minutes, apply brakes in vehicle without starting. Should have 2-3 fully assisted brake applies before the pedal starts to firm up. If not, booster or check valve is bad. You've ensured the vacuum line, check valve, and any vacuum reservoirs potentially used are all operating correctly? Does your brake light work correctly?
May 28, 2018
When you replaced the booster did you make sure that the small push rod on the back was adjusted same as where itwas when you removed old one where it fits to the brake pedal there is a small adjustment bolt there ,and disc brakes have a different length rod to drum brakes.When you purchase new booster they come with both size rods.
May 28, 2018
achieveable complications are starter solenoid, starter relay, or ignition change, perchance a software computer chip and a lot less probably the before reported transmission or brake interlocks. it truly is the problem: it can not be clinically determined if the vehicle is taking off because the circuit is for sure operating then. it may purely be clinically determined even as the circuit isn't operating because then the meters can hit upon a spoil contained in the circuit. about the purely thanks to get this clinically determined is to have your motor vehicle towed to a mechanic even as it takes position next time and under no circumstances attempt to restart it. certain it truly is an severe priced soreness contained in the butt yet so is replacing factors blindly. My journey is this may happen further and extra many times and finally go away you stranded, perchance in a detrimental position. connect Allstate Motor club ($a million for the first 3 months) and performance it towed even as it takes position back, allstate grants you loose towing as a lot as $250 worth! undesirable issue, good success!
May 28, 2018

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