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Congrats on getting them done. This slight pull you mention is a classic sign of either a slightly sticking front caliper, or unmatched/sticking front pads, or both. The front pads can quite easily jam in the caliper. So I would look at that first.
Greg
All the calipers and pads are brand new, at all four corners. I suppose the pad could have jammed, but that seems unlikely as it's all new, and likewise I doubt a piston is stuck (that was the problem that led into all this).
Originally Posted by orangeblossom
Hi Hydro
A Blocked Valve in the ABS is usually the result of either not renewing Brake Fluid on a regular Basis.
Or Levering the Brake Pads back into the Calipers, when for instance replacing the Brake Pads, without having the Bleed Nipple open (This is the Kiss of Death on an XJS)
As this sends Brake Fluid the wrong way up the System, where the Microscopic hole in a Valve (or Valves) can get Blocked up with a Microscopic piece of 'Crud'
Hence the Sharp Pull from one side to the other.
Or it could be a Broken Wire in the ABS Valve Block which can produce exactly the same result.
Or a malfunctioning Wheel Speed Sensor.
In reference to the valve block, sadly we didn't refresh the fluid as we'd thought the PO had done so since the rest of the car's fluids were kept up on. That is what led to the sticking front caliper, that led to the overheated fluid, which led to the loss of the brakes (and subsequent replacement of everything). We did have to lever the pads back in when trying to limp the car home, but that was after we'd bled it, so the fluid should at least have been brand new, if it went backwards. They also all bled just fine weeks later (not that that means anything, I know flow =/= pressure).
On the plus, the ABS is functional, I tested it after all the work as part of the process. That leads me to believe the problem is not electrical. Also, common sense tells me that if it was physically blocked in the valve port, the pull would be constant, right? The car brakes perfectly straight after the momentary pull. It seems more like there's a delay in the pressure to that wheel... Which I guess does sound ABS related. Ugh, here I was thinking I got away without touching that snake pit.