Guest znow white Posted May 28, 2008 Share Posted May 28, 2008 im running into a wierd issue on my 71 l28et zed im running the 15/16 master cylinder 4x4 calipers non vented front and the rear i have early 280zx rotors and calipers my issue is i bleed everything from master cylinder to each caliper using longest line first to shortest RR RL FR FL i even switch all the calipers because my bleeders were on the bottom and now all the bleeders are up top. I then adjusted the rod in the booster making it longer. I then put a check valve between manifold and booster switched it both ways still nothing. I know theres no air in the system when the car is off it feels good on the pedal. when the car is on it goes all the way down and no brake power at all ?! you guys think the proportioning valve must be gutted when switching to rear discs on the early 240z i dont think this is the issue now because its not a distribution problem and before upgrading the front and rear brakes i had a wierd issue like this?! Quote Link to comment Share on other sites More sharing options...
JMortensen Posted May 28, 2008 Share Posted May 28, 2008 Search "reaction disk". Quote Link to comment Share on other sites More sharing options...
Guest znow white Posted May 28, 2008 Share Posted May 28, 2008 ok spot on it looks like it is a reaction disk issue i searched and read and read. so can the disc / rubber thing be put back in place or i have to get a new booster? Quote Link to comment Share on other sites More sharing options...
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