1994 Dodge Ram 94 Dodge Ram 1500 5.2 v-8 no ABS

Tiny
JGCF57
  • MEMBER
  • 1994 DODGE RAM
Brakes problem
1994 Dodge Ram V8 Two Wheel Drive Automatic

The brake is soft and will travel 75% to the floor. It is impossible to lock up the wheels on dry pavement. I have a new master cylinder and plenty of brake material on the shoes and pads. There are no fluid leaks. Bleeding the brakes was routine except the right rear wheel cyl. Would spit a tiny amount of air followed by a steady stream of fluid every time I opened the valve.
This is the same vehicle with the tach diagnosis problem I asked earlier.
Thanks for your help.
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Thursday, April 10th, 2008 AT 2:29 PM

6 Replies

Tiny
JACK42
  • MEMBER
You will need to start by figuring out where the air is getting into the brakes. Since it is only one wheel cyl doing it, I would guess it to be th ecylinder. Once th esystem has no air in it you can figure out the est. Are we talking about Rear ABS only? IF so it sounds like the "dump valve" is bypassing.
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Thursday, April 10th, 2008 AT 2:52 PM
Tiny
JGCF57
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The truck does not have ABS. The reservoir is full of fluid. There are no leaks, everything is dry. I think an air leak would be easy to find by pressing the brake hard and looking for fluid. The air amount is so tiny and followed by a long steady stream of fluid I just don't get it.
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Thursday, April 10th, 2008 AT 3:10 PM
Tiny
JACK42
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You say it only does it on one rear wheel? Could be drawing the air in when the cylinder returns after you let off the brake
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Friday, April 11th, 2008 AT 9:17 AM
Tiny
JGCF57
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I find the truck has RWAL as standard equipment. I pulled the gas tank to confirm the brake lines are clean and dry from the master to the wheel cylinders. I have so far replaced the master cyl. And the RR wheel cyl. To no effect. I had pressure and gravity bled the system. I stopped getting air from the new wheel cyl. And tried bleeding the combination valve lines and the RWAL valve lines with no effect. Then for fun, I bled the LR wheel cyl. And now started getting some air. When my neighbor pumps the pedal, I open the bleeder valve (LR) and get 1/2 inch of air followed by 11 inches of fluid in a plastic tube. Every time he pumps and I open the valve, I get 1/2 inch of air followed by 11 inches of fluid. All the valve lines are tight and dry and there are no dash warning lights.
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Wednesday, April 16th, 2008 AT 4:02 PM
Tiny
JACK42
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Stop pumping the pedal. Try opening the bleeder, then have your neighbor slowly push the pedal down and hold it there. Then close the bleeder and have him slowly let the pedal come back up, no rapid pumping
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Wednesday, April 16th, 2008 AT 5:01 PM
Tiny
JGCF57
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You say push and I say pump but we are talking about the same thing. You were right earlier about drawing air in upon release of the pedal. Someone told me to wrap teflon tape on the bleeder valve threads and this worked. It is the only explanation for air right at the bleeder every time I opened the valve. Although I do tighten the valve before my neighbor releases the pedal. Tight enough so no fluid exits on his next push/pump. So now I have no apparent air in the system and while the pedal feels pretty good, the brakes still have no power. I thought I purchased a bad master cyl. But the third one does no better. I read a Dodge '94 TSB on bleeding ABS systems. It was really strange! Since I have RWAL I hope none of that applies to me. There must be some trick to this. I am now back to square one. Thanks for your help.
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Saturday, April 19th, 2008 AT 10:58 AM

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