I also have a 1988 toyota pickup 4 cylinder 4x4.
And it sounds like I am having the same problem. I can pump it up and the brake holds but as soon as I release the peddle to the top the next pump goes to the floor. I have bleed All five bleeders in the proper sequence. How does the return from LSPV to the front brake get bleed? Does the bleeder (on the LSPV) do both lines. in and out? It is as though I have a huge pocket of air some where.... Please post any progress.
Thanks and Good luck Jack
Cody have you fixed your problem?