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Can’t get rid of air - R/R brake - “ONLY???”

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JoeMc
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Posts: 3
Joined: Mon Apr 15, 2019 9:05 pm
Location: Levittown, PA
Vehicle: 2002 Mercury Sable LS

Can’t get rid of air - R/R brake - “ONLY???”

Post by JoeMc » Mon Apr 15, 2019 9:37 pm

Daughter’s car - 02, Sable, LS - rear drum, ABS & Traction Control. She lives in Seattle, WA, I live in Levittown, PA. We’re visiting this week heading home Easter Sunday. Need some help quick.

Finally, here’s what’s going on. Brake pedal real low. Bleeding the brakes (started at R/R, clear hose on bleeder) reservoir checked before starting it was at full, a ton of air came out, went 3 bleed cycles checked and filled reservoir. Repeated 5 - 6 times, all new fluid coming out by this point, but still air, I mean like an inch in the hose then fluid, then ton of air. I gave up on R/R and went to L/R, no air, repeated bleeding till new fluid appeared. I never let the reservoir get close to low. Moved on to the R/F, no air, repeated till clear fluid. On to L/F, same deal. Stepped back to R/R, ton of air, then fluid, then more air. I can’t seem to get rid of the air? I could feel and see the R/R brakes function as I was bleeding so seems they do function somewhat. The shoes have plenty of material and no apparent moisture on the wheel cylinders.

Checked all brake hoses at all wheels no cracks or other signs of fault, traced hard lines up to firewall, no leaks apparent and not rust anywhere. Same from firewall to M-cyl and as far as I could see towards the ABS module. Today, I removed the battery tray and air box to get a full look at the rest of the hard lines. There are no leaks or rust anywhere = all lines are very sound?

WTH is going on? There’s no ABS light on the dash, however, the brake light is on constant. I feel that the front brake circuit is working fine and based on the slight pull to the right when braking only the L/R brake is working, obviously with all the air in the R/R there’s no braking there...

My thoughts, as to where air “might be infiltrating”, are as follows (but still being a pressurized system I think I’d see evidence of fluid somewhere - wouldn’t I???):
1- ABS Module somehow sucking air for the R/R circuit = no moisture anywhere? Internal failure?
2- Rear hard lines, at transition below M-cyl, seem to have a union on both lines that appear to be factory - also dry.
3- M-cyl bad - “But”, wouldn’t there be air in both rear wheel cylinders???

(Last and hopefully the culprit)
4- R/R Wheel cylinder - somehow sucking air, but not leaking fluid???

This one is a stumper to me, I’ve been working on cars my entire life (a young 60 years old am I) with a stint restoring muscle and classic cars, I’ve always done everything on our cars/trucks and have yet to come about something this bizarre.

HELP!???
2002 Sable LS 3.0 OHC - Daughter's car
2011 Prius - Wife's car
1999 Ram 2500, Cummins, 525 RWHP/1000RWTQ - My toy


JoeMc
New Member
Posts: 3
Joined: Mon Apr 15, 2019 9:05 pm
Location: Levittown, PA
Vehicle: 2002 Mercury Sable LS

Re: Can’t get rid of air - R/R brake - “ONLY???”

Post by JoeMc » Wed Apr 17, 2019 10:42 am

Update: Looks like ABS Module is kaput. Son-in-law made the call to cease efforts. They're moving on to a new car. Most likely a Toyota Camry. Unfortunate, the Sable is loaded, leather, multi-disc CD, power sunroof etc. and only has 84,500 miles, newer Continental tires, and although the paint is scratched up from Daughter's college days the car otherwise is tip-top. It only books out at $1,881 - 3,320 KBB Private Party and NADA puts it at $1,850 Rough Trade, 2,400 Avg. Trade, 2,850 Clean Trade amd $4,400 Clean Retail. So considering we purchased at $3,250 with 41,000 miles back in 2014 I'd have to agree the son-in-law is making the right call, especially since the ABS part is not cheap and the labor to get it working correctly isn't either. Bub eye old girl! Sob.
2002 Sable LS 3.0 OHC - Daughter's car
2011 Prius - Wife's car
1999 Ram 2500, Cummins, 525 RWHP/1000RWTQ - My toy

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Re: Can’t get rid of air - R/R brake - “ONLY???”

Post by Webmaster » Wed Apr 17, 2019 11:50 am

Good choice! Unless it's a 2007-2008 Camry, otherwise :D
2000 Ford Taurus SEL (excellent car, sold to a friend)
1992 Mercury Sable GS (good car except for the tranny, sold)
Current: 03 F150 King Ranch SuperCrew
Other Fords owned: 02 F150 SuperCrew 4x4, 11 F150 EcoBoost, 07 Ranger, 01 F150 XLT, 98 F150 XLT, 96 Thunderbird LX, 95 Escort GT, 86 Mustang LX, 82 Mustang

JoeMc
New Member
Posts: 3
Joined: Mon Apr 15, 2019 9:05 pm
Location: Levittown, PA
Vehicle: 2002 Mercury Sable LS

Re: Can’t get rid of air - R/R brake - “ONLY???”

Post by JoeMc » Wed Apr 17, 2019 2:31 pm

Agreed, they'll go new as in 2019. Too bad we (in America) don't make real "affordable" American cars (aside from those foreign ones made in USA) that'll run like iron as the Toyota's do. Sad...
2002 Sable LS 3.0 OHC - Daughter's car
2011 Prius - Wife's car
1999 Ram 2500, Cummins, 525 RWHP/1000RWTQ - My toy

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