installed new front rotors and new pads on my honda. After bleeding the brake fluid, brake pedal will not hold pressure. No visible leakage on caliber or hoses. On starting engine brake pedal drops to the floor.
Your lines were probably not completely bled AND/OR you have a worn master cylinder. Does the brake pedal offer some resistance when you press it quickly? In other words, can you “pump” the brakes?
before you did the brakes what was the symptom? was the pedal spongy before?
did you work on the calipers? replace a brake line?
if not, then you have to go back and properly bleed them. when you bled them did you make sure you never ran the reservoir out of fluid? how did you bleed them? two people (one pumping, one cracking the bleeder?) or one person? bleeding bottle? more info may help decipher this.
reply to first question: no, brake were not spongy.
second answer: yes, I worked on the caliper and disconnected the brake lines.
my helper pumped the brakes and I cracked the bleeder with the bleedinng bottle.
thank you.
Yes, the pedal resists when the engine is off. When the engine is on, the brake pedal drops to the floor.
did you replace a caliper? if so are you sure the caliper is for that side if the vehicle. some cars you can put the left on the right and visa versa. the difference is the bleed screw will be on the bottom instead of the top where it needs to be!
here’s my method for bleeding brakes that are hard to bleed completely. It DOES take alot of brake fluid, but hey, it is like a brake flush for free! you can either only replenish the fluid in the reservoir as you deplete it, or just recycle the old fluid. I replace as i do it, so it is a free brake flush.
go to the auto parts store get about 15’ of clear plastic tube. they sell it by the foot.
get the size that will “just” squeeze over the bleeder screw. starting from the right rear, put the hose on, and run it all the way up to the brake fluid reservoir. just crack the bleeder, and pump slow even strokes until the fluid is clear no bubbles, then close the bleed screw. repeat with the left rear, the front right, then the front left last. you will notice alot of cruddy colored fluid at first this is the old dirty fluid in the lines. you can decide yourself if you want to totally recycle or change it until the fluid runs clear. your choice. BUT YOU MUST NEVER LET THE RESERVOIR RUN OUT which ever way you do it.