Excessive brake pedal travel

Do you have rear drum brakes?

Raybestos Advanced Technology Pads & Rotors on all 4 wheels

Were the calipers checked for binding? Seized caliper slider bolts would often result in low brake pedal and so would a failing master cylinder.
Is the ABS system working correctly?

I have seen bad brake booster check valves cause low brake pedals.

Its going back to the dealer tomorrow morning. The Master Cylinder is new but I don't believe the calipers were checked nor was the ABS system. I had to brake hard today for a deer crossing in front of me and it felt like the ABS never kicked in as my foot practically went to the floor.

Is your abs light always on while your driving?

ABS light is not lit at all

Then the abs should be working if the light is out and you have abs on your car.

It has the ABS system. Was reading elsewhere that it may be caused by a leaking wheel bearing also but I have no signs of any leaks and the Master Cyl is full.

Also a sticking caliper pin internal leaking etc.

Thanks for all your help....Will post the results if the dealer can locate the problem. It just seemed odd to me that after changing rotors and pads all around that the car would develop a stopping problem. This was just preventive maintenance and the car didn't actually need pads or rotors at this time. The car actually stopped better before.

I have seen some of the aftermarket brake pads cause extra brake pedal travel.Do you have the old brake pads?

No, I had no reason to keep the old pads and I assume my tech threw them out by now....That's an odd one but I did have Raybestos on the front, replaced at about 70,000 miles without a problem and the rear's were a no name brand thrown on by a shop I really didn't care for.

Were the old pads worn evenly or sloped?

I think evenly but the front rotors were definitely warped.

What you need to do now is to check if the slider bolts are seized. Quite often when there are insufficient lubricants on them, they tend to stck when new pads are installed. One more thing to check would be the handbrake cables.

I have seen many cases of wrong adjustment whereby the rear brakes would not self adjust and this would also result in low brake pedal.

If they live where they salt the roads then the ebrake cables seize caliper pins etc.

OK...Thanks for all the replies guys! I just returned from my local Honda dealer. Their recommendation afer bleeding the brake lines was for me to go back to my local mechanic that installed a new Master Cyl or let them, the dealer, install a "Honda" Master Cylinder. My local mechanis installed a brand new "Wagner" Master Cylinder last week after receiving a bad one from the warehouse initially.
At this point, I think I need a local pro to REALLY check things out!

New parts failing are not news and that is a logical explanation and since they have inspected the problem, we believe the diagnosis should be correct.

I would go with the dealers diagnosis.

That seems to be the theory from 2 other local mechanics as well. Nothing but the OEM Master Cylinder works correctly.

Coming from the dealer they should know what needs to be oem.Sometimes only oem parts work.

So the dealer was wrong....A Honda OEM master cylinder made little difference in the feel of the brake pedal. I replaced the rubber brake lines which helped a little and had the brakes bled 4 times. The latest local diagnosis says I should use Centric OE brake pads up front and that may alleviate the problem. Really? The new ones that went in less than 500 miles ago were Raybestos Quiet Stop....Is a different manufacturers pad really going to make any difference?

Brake pad quality would affect the braking performance but not the low brake pedal. If it is llow pedal travle that is causing the problem, I would again suggest checking the brake caliper slider bolts and caliper pistons for seizure.

The front brakes would be more likely to cause poor braking efficiency.

You could also take it somewhere that has the gauge to test caliper clamp force and fluid Pressure to the calipers etc.