how to diagnose a no brake problem

Asked by Jul 19, 2017 at 09:40 PM about the 1998 Pontiac Grand Am 4 Dr SE Sedan

Question type: Maintenance & Repair

back out of garage pedal went to floor no sign of brake fluid on floor, could not see any fluid in reservoir filled pumped pedal still no leeks on floor an still no brakes, pedal hard with engine off ,pedal still goes to floor,pedal very soft with engine at idle still no brakes an still no fluid on floor   

2 Answers

50,855

If you could not see any brake fluid in the reservoir, then it went somewhere and there is a leak. Perhaps check to see if it leaked out of the master cylinder into the brake booster?

1 of 1 people found this helpful.
69,555

Bob is correct. You have a leak. The hard pedal with the engine off is normal because there's no vacuum assist with the engine off. HTH. -Jim

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