not sure what happen but i did took my caliper out to install extended studs and now my SRS light is on and my brake pedal sinks when vehicle is driving but its firm when idle..weird..any ideas?

 

Is the Abs light on or the brake light ?
Could have unplugged the Abs and left it off .

 

not the brake light...SRS light..i thought it might been the crash sensor which i unplugged to do some body work but its not that..checked brake lines and no leaks, no where is bulging up..abs sensor plug in tight

 

It sounds like it may have been the crash sensors. If you unplug those and plug them back in without first unplugging the battery , the SRS light comes one.

 

Try and unplug the battery and leave it off for a little while . I know when a friend of mine messed wit his car TC Abs and Srs lights turned on but after he reset the car it was fine .

 

i already tried that. im not even sure why the brake pedal is sinking.. reset about 3 times and still there

 

That doesn't work on our cars. SRS has a battery backup.

 

when i brake on highways..vehicle stops but brakes sinks and i hear very slight high piece brake noise like something is loose when braking..there is only two bolts to take off to remove front brake assembly and they are tight so not sure what the noise is..man now i feel like i shouldve left it

 

The electrical gremlins caused the SRS light to come up on my car. Fixed everything up and no matter what I did the only thing that worked for me was to have the code cleared from a body shop on a Snap on computer. That cost me 50-60 vs. the dealer who wanted 100-120 to reset it.

I knew it was due to the harness corrosion. Not sure if EVOSCAN has ability to clear or read SRS codes yet but cleared I got it then and been fine ever since

 

im going to bring it to my buddies shop tomorrow and use his scantool...another thing is i havent drove the evo in 2 month... honestly im not too worried about srs light being on but the brake sinking on highway...i took the whole brake assembly and double checked everything and reinstalled everything...hopefully be back to normal tomorrow when i have a chance to drive it

 

i dont know about your brakes but if you unplug ANY of your srs components without first unplugging the battery you will pull a srs light and have to get it erased by the dealer.

 

what do you mean "took the caliper out"? if you completely removed the caliper and didnt bleed the system it will cause a spongy and sinking pedal.

 

^
he right, if "did took my caliper out" means you unhooked your brake line then its time to bleed out the air you just let in.

 

sorry for the confusion..i didn't disconnect no brake lines or sensors..i unbolt the caliper, remove pads and rotor to check for problems..i even used hanger to make sure i dont kink the line

 

sounds like you didnt do anything wrong.. you should try and bleed all 4 calipers anyway and see if the problem goes away