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#1
09-26-2006, 08:14 PM
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Brake Problem
I am going down interstate at 65 to 70 for 10 or 15 miles and when I take the exix ramp my brakes for almost to the floor.
I can drive it on down the road a ways and brakes come back and are as good as ever. Checked for leaks and found none and Brake fluid is a normal level. This has happen 2 times now. This is on the 1984 300d Last edited by Nissan_diesel; 09-26-2006 at 08:16 PM. Reason: add information 
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#2
09-26-2006, 09:48 PM
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Check the vacuum. if not enough vac then maybe a leak in your vac lines system around the brakesytem. Or your vacuum pump is failing.
check your brake vacuum booster also. do a search of archives for methods. good luck 
__________________
1979 300D 220 K miles 1995 C280 109 K miles 1992 Cadillac Eldorado Touring Coupe 57K miles SOLD ******************** 1979 240D 140Kmiles (bought for parents)  *SOLD.SAN FRANCISCO/(*San Diego) 1989 300SE 148 K miles *SOLD
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#3
09-26-2006, 10:02 PM
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also might be failing master cylinder. first stage may fail under heavy braking and then you just engage the second stage near the foorboard.
tom w
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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#4
10-08-2006, 01:32 AM
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Quote:
heh heh tom w
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual. [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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#5
10-08-2006, 01:36 PM
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How could I, you beat me to it!
__________________
2016 Corvette Stingray 2LT 1969 280SE 2023 Ram 1500 2007 Tiara 3200
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#6
09-26-2006, 10:05 PM
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Quote:
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#7
09-26-2006, 10:19 PM
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Sounds like a master cylinder. Don't wait or you will crash into something.
__________________
2016 Corvette Stingray 2LT 1969 280SE 2023 Ram 1500 2007 Tiara 3200 Last edited by Hatterasguy; 09-26-2006 at 10:50 PM.
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#8
09-26-2006, 10:30 PM
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I agree. Master cylinder.
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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#9
09-27-2006, 11:18 AM
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Not likely vacuum related. That would give a firm pedal that required a lot of effort to stop, rather than a pedal that goes down to the floor.
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#10
09-27-2006, 11:28 AM
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One old fashioned master cylinder test....
Is to press and hold the pedal, with some pretty good pressure.
If it slowly sinks any amount, no further questions, it's bad, replace it. If your brakes are acting up, and you don't have enough experience, get some help. Life is too short for bad brakes.
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#11
10-07-2006, 11:09 PM
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Quote:
Glad you got it fixed.
__________________
2016 Corvette Stingray 2LT 1969 280SE 2023 Ram 1500 2007 Tiara 3200
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#12
09-28-2006, 08:46 PM
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Update
Replaced Master cly. and checked front pads.
Pads were ok bleed front brakes to remove all old Brake fluid. Used Dot 4. Will get to back brakes tomorrow.
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#13
09-28-2006, 09:38 PM
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Quote:
__________________
2016 Corvette Stingray 2LT 1969 280SE 2023 Ram 1500 2007 Tiara 3200
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#14
10-07-2006, 09:13 PM
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Up Date Problem Fixed
Ok I checked all brake pads all were ok.
Replaced the master cyl. Changed the brake fluid. (Used Dot 4) Took car out on interstate and when it came time to stop I had good brakes so problem is fixed. Thanks for the help.
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