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Are you using a clear hose attached at the wheel caliper bleeding fittings into a jar of brake fluid? Do you get equal flow out of all four calipers?
The ABS modulator as well as the master cylinder can be the issue, both have to be fully bled. Some articles that may be helpful: https://www.knowyourparts.com/techni...-installation/ https://www.brakeandfrontend.com/bleeding-abs-systems/ George |
Here are the service manual pages for reference:
https://cimg6.ibsrv.net/gimg/blazerf...785ccbfa24.jpg https://cimg8.ibsrv.net/gimg/blazerf...27bd8b42db.jpg https://cimg9.ibsrv.net/gimg/blazerf...eb227eff46.jpg https://cimg0.ibsrv.net/gimg/blazerf...77619ab9ff.jpg https://cimg1.ibsrv.net/gimg/blazerf...d9222a23cb.jpg https://cimg2.ibsrv.net/gimg/blazerf...aefc1c2fa8.jpg George |
Before attempting the automated bleed, all air MUST be bench bled from the master cylinder AND the steel flex lines going to the EBCM. The adage of "junk in, junk out" applies here. The automated bleed operates all of the solenoids in the EBCM. It draws fluid from the master cylinder, (and steel flex lines), and forces it into the steel lines exiting the EBCM. Each caliper must be bled to remove the air after doing the automated bleed. The automated bleed may need to be done several times. In the post above, refer to page 5-207, steps 10 through 13. One thing that is not clear in step 10, is that during the automated bleed, you must maintain constant pressure on the brake pedal. Once the scan tool confirms that the bleed is complete, then you can release brake pedal pressure.
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Thanks. Yes, I've been using a clear hose into a jar to see what is happening. And yes, equal flow out of all four calipers (which tells me it isn't the proportioning valve).
I've put a couple miles on it, and, while it stops, the pedal feel just isn't where I'd like it to be. Thanks for the service manual pages. I'm gonna put it back up on jacks and make sure I follow them. |
Originally Posted by Captain Hook
(Post 734458)
Before attempting the automated bleed, all air MUST be bench bled from the master cylinder AND the steel flex lines going to the EBCM. The adage of "junk in, junk out" applies here. The automated bleed operates all of the solenoids in the EBCM. It draws fluid from the master cylinder, (and steel flex lines), and forces it into the steel lines exiting the EBCM. Each caliper must be bled to remove the air after doing the automated bleed. The automated bleed may need to be done several times. In the post above, refer to page 5-207, steps 10 through 13. One thing that is not clear in step 10, is that during the automated bleed, you must maintain constant pressure on the brake pedal. Once the scan tool confirms that the bleed is complete, then you can release brake pedal pressure.
Once I get this brake thing finalized, gotta fix an oil leak, then take care of a slight hesitation, and she should be good to go. |
Sounds like your on the right track, you'll get there.
George |
The procedure for my Ford pickup calls for bleeding of the brakes, bleeding of the ABS and another bleeding of the brakes. I can't figure any way for the ABS system to purge the air out of the system, just out of itself and into the brake lines. Then it's a pretty long ride to those rear brake bleeders.
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