Hi,
I changed the brakes all round on my 2005 Range Rover Sport 4.2 SC RHD. All parts moving freely on the brakes, no binding. Recently purchased so don't have a good baseline on the brake feel.
After bleeding I get a solid pedal when engine is off but once the engine is running the pedal sinks slowly down to the floor. If I hit the brake like in an emergency the pedal goes hard and starts sinking slowly making it harder to stop. After some driving in the car park the pedal will become softer and have a lot of travel. Hitting the brakes at this point still causes it to go hard but normal braking pressure will allow it to brake and stop ok but I still get full travel.
I have no external fluid leaks, the pedal goes to the floor so in 20 pumps like this I would drain the fluid and this isn't happening the fluid doesn't change at all.
I manually bled the ABS module by following the directions of a technician on here of cracking the connectors on the top of the ABS module while someone held the pedal and re-tightening but that didnt help. Servo is new and holding vacuum. Thought it may be an internal master cylinder leak even though it wasn't doing it with the engine off so I have replaced that with a new one, fully bled, still the same.
I thought I should do a proper ABS bleed so got it on SDD and followed the ABS Bleed procedure where the system got me to open the bleed nipples on each wheel and pump the brakes while it did its thing. It told me to do them in the order
Rear Left. Took around 30 seconds and there was no ABS Pump or Solenoid activation. Fluid flowed whole time.
Front Left. Took around 30 seconds and there was no ABS Pump or Solenoid activation. Fluid flowed whole time.
Rear Right. Took a couple of minutes and had a lot of ABS Pump and Solenoid activation. Pedal went solid for some of this one, no fluid flow.
Front Right. Took a while and had a lot of ABS Pump and Solenoid activation. Fluid flowed whole time, sometimes slower than others.
I did this twice with the same results and Its still doing the same thing so my question is should the procedure pulse the solenoids and pump for each corner or does the above sound correct? Having replaced the servo and master cylinder I'm suspecting the ABS unit as I'm not losing fluid and its the only thing I can think would be allowing the M/C to do a full stroke at this point.
Cheers
Stot
I changed the brakes all round on my 2005 Range Rover Sport 4.2 SC RHD. All parts moving freely on the brakes, no binding. Recently purchased so don't have a good baseline on the brake feel.
After bleeding I get a solid pedal when engine is off but once the engine is running the pedal sinks slowly down to the floor. If I hit the brake like in an emergency the pedal goes hard and starts sinking slowly making it harder to stop. After some driving in the car park the pedal will become softer and have a lot of travel. Hitting the brakes at this point still causes it to go hard but normal braking pressure will allow it to brake and stop ok but I still get full travel.
I have no external fluid leaks, the pedal goes to the floor so in 20 pumps like this I would drain the fluid and this isn't happening the fluid doesn't change at all.
I manually bled the ABS module by following the directions of a technician on here of cracking the connectors on the top of the ABS module while someone held the pedal and re-tightening but that didnt help. Servo is new and holding vacuum. Thought it may be an internal master cylinder leak even though it wasn't doing it with the engine off so I have replaced that with a new one, fully bled, still the same.
I thought I should do a proper ABS bleed so got it on SDD and followed the ABS Bleed procedure where the system got me to open the bleed nipples on each wheel and pump the brakes while it did its thing. It told me to do them in the order
Rear Left. Took around 30 seconds and there was no ABS Pump or Solenoid activation. Fluid flowed whole time.
Front Left. Took around 30 seconds and there was no ABS Pump or Solenoid activation. Fluid flowed whole time.
Rear Right. Took a couple of minutes and had a lot of ABS Pump and Solenoid activation. Pedal went solid for some of this one, no fluid flow.
Front Right. Took a while and had a lot of ABS Pump and Solenoid activation. Fluid flowed whole time, sometimes slower than others.
I did this twice with the same results and Its still doing the same thing so my question is should the procedure pulse the solenoids and pump for each corner or does the above sound correct? Having replaced the servo and master cylinder I'm suspecting the ABS unit as I'm not losing fluid and its the only thing I can think would be allowing the M/C to do a full stroke at this point.
Cheers
Stot