Well to make a long story short, back in December I got my calipers powder coated (and yes I did get brand new seals, the person who powder coated them, rebuilt my calipers). Got my calipers re-installed begining of this month and the brake pedal doesn't feel the same. I've been to busy with birthdays, holidays and work and I really haven't had much time to mess with my car. I have blead the brake 4 times now (everytime I bleed them, its seems to be getting, a little better). I've even blead the brake master cylinder.

My brake pedal isn't as responsive as before. Sometimes I have to pump it twice before my brakes grab right away. My brake pedal DOESN'T sink to floor. This issue happens intermitantly. Any ideas...?

Brake Master Cylinder, Brake Booster, Calipers Seals..?

Thanks
Pablo

 

What are you using to bleed brakes? And how did you bleed them?

 

I've had a similar situation since I rebuilt the front calipers last spring (by rebuild I mean new dust boots). I've bled plenty of times but it's never gotten resolved (I've bled them plenty of times before the rebuild with good results, so I know I'm bleeding correctly). At this point I'm considering bleeding the MBC as well.

 

I've blead them manually, I haven't used any vacuum pumps.

I've started bleeding them using 1 pump and 3 pumps and hold.! I've always started outside nipple then inner.

First 3 times i've started- Right Rear, Left Rear, Right Front, Left Front, Clutch Line
4th time- Right Rear, Left Rear, Left Front, Right Front, Clutch Line

At this point i'm pretty stumped, lucky the car brakes OK, but not just like it use to..! I don't want to start replacing parts for no reason, I really want to get to the bottom on the issue. My master techs at work have taken a look at my car and don't see anything VISUALLY wrong...?

 

so you haven't gotten to the bottom of your issue either.?

 

There's air somewhere in your lines that's compressing. Try bleeding in this order: passenger rear, driver front, driver rear, passenger front. That's the proper order for an evo with abs.

 

I'll try this order tomorrow.! I've seen so many different blead sequences online.! Any specific method I should use to blead them.?

 

Yea, haven't figured it out yet.

If I do a mini-pump of the pedal before braking the pedal feels excellent, nice and firm. Is that the same for you?

 

yup same symtom.!

 

Get a friend who you trust to step on your brake pedal and have him (or her) pump, pump, pump and hold the pedal. While your pedal opperator is maintaining preasure on the pedal crack open the bleeder screw. Allow fluid to escape, but be sure to close the bleeder screw before the pedal being pressed by your assistant reaches the end of it's range of travel.

This isn't a comprehensive how to, but I hope it helps. There are some really good write-ups on this in the how to section. Your braking system isn't one you want to leave half done.

 

I've done this exact thing at work the past 2 times with one of my master tech, with me pumping the brake pedal. Pump, pump, pump and hold, i'll try this new sequence

 

Yes you CAN NOT go wrong with this technique, at least when it comes to brakes. I have seen before where this technique has beaten even special made automatic bleeding systems.

Hopefully you will get your problems resolved. You can also try loosing the lines at your ABS pump and let them sit overnight. When you wake up in the morning you can tighten them up and then top it off, followed by another round of bleeding. That would definetely get all of the air out!

-Vincent

 

it appears that this sequence worked, i'll let everyone know by monday, how it feels after the weekend is over.