blknblubkrdude

iTrader: (16)

I recently reinstalled all the brake calipers into my EVO after getting them powdercoated.

I used my Motive Power Bleeder and got all the components full, but the pedal was still mushy.

I had my trusty assistant (GF) run the brake pedal while I bled. I noticed a lot more air came out this way.

I did have the engine running (as the Service Manual reccomends) both times, and went through 3 quarts of fluid.

The pedal is better, but not up to spec. I believe air is trapped in the ABS module

Does anyone know of a way to cycle the brake system without the use of a Mitsu scan-tool, or evoscan?

Thanks!

JDMS60R

iTrader: (9)

Thats weird I just changed out my abs module, and just bleed it normal. No key on or cycling or scan tool, everything is rock solid. Maybe I just got lucky, I know that doesn't help you any, but its possible to do.

blknblubkrdude

iTrader: (16)

I know it is possible, as when I worked for Cadillac/GM I did it several times. There was only 1 occasion I needed to use the Tech 2 to run the abs pump.

I guess I'll just go ahead and buy the Tactrix, that way I can get rid of my EGR / Rear O2.

Thanks!

grahamab

iTrader: (10)

you might want to look into whether or not you can cycle the ABS using Evoscan. I wasn't sure that it worked, but I might be wrong.

blknblubkrdude

iTrader: (16)

When searching, I only found one thread that related to mine:

https://www.evolutionm.net/forums/ev...s-evoscan.html

It seems like evoscan will not do that function.

blknblubkrdude

iTrader: (16)

Well I bled and bled some more. The brakes movement is still way out of spec (.8 inches) I am driving it now for the first time in hopes to get the bubbles freed up.

blknblubkrdude

iTrader: (16)

Cycled almost 2 gallons of fluid through them after putting about 100 miles on the system trying to break some bubbles loose.

Any help?

Thanks

rawkus

iTrader: (16)

I have the tool to cycle ABS while bleeding brakes and... well... it doesn't really help as the fluid stops flowing when the ABS is cycled. I too use the Motive Bleeder and have also bled the old fashion way. One thing I have done is use both the Motive and old fashion way at the same time and that has worked. Make sure you don't have crazy pad taper or a stuck piston as that can affect the pedal feel. Good luck!

Dan

blknblubkrdude

iTrader: (16)

My calipers have all new seals/boots, and the pads are new EBC reds.

I spent another couple hours this morning bleeding, and went through about 3 quarts more of fluid.

I finally got the pedal within spec (<.8" freeplay")

I was so stoked I could not believe it.

I put all the wheels back on, pull the car out of the garage, and about two pedal strokes later I get some mush. WTF?

It is definitely out of spec now, but it's liveable.

Some other day, lol.

andrewzaragoza

iTrader: (6)

if its getting mushy again you may want to check all your brake lines for leaks.

milford

iTrader: (18)

are you bleeding both valves on each caliper?

blknblubkrdude

iTrader: (16)

That's the first thing I checked. It's good to go.
That's what I thought, but the way it happened wasn't as if there were a leak.

10-4! I have worked on and bled a variety of brake systems as a GM/Cadillac specific tech, and never had any problems bleeding like this.

There has to be air trapped somewhere, because I bled for hours until not a single molecule of air would come out.

I think I may invest in a reverse bleeding pump, and give that a shot.


Thanks!

rawkus

iTrader: (16)

The other little thing I did that helped, was bleed the outside of the caliper, then inside and then do the outside again and every once in a while we saw a little bubble doing that.

Dan

barneyb

I'd like to know how they wet the brake systems these cars with ABS at the factory. I had another car that I bled and bled and got it pretty good but then when I opened a line at the proportioning valve, I found the valve dry. There has got to be something we are missing.

blknblubkrdude

iTrader: (16)

I agree. I put the EVO back on jackstands and bled the s'not out of them again just using the Motive bleeder.

I got a decent amount of air out of them, but nothing significant.

The pedal play is still out of spec @ 1.3" of play.

I have no idea where the air is trapped.

I really wish I had a way to cycle the abs when the system is pressurized during bleeding.