possibly pump time
Sounds like the pressure valve in the pump may be sticking when the clearances tighten up due to heat.
You might try some cleaner fluid (for P/S from parts store) in there for a week and see if it helps.
If not, then don't just leave it in there, because if left too long, it will destroy the rack seals.
You may need a reman p/s pump. Carquest is between $135 & $235 (my cost & full list price)
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Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing.
TEMS, and some nice MODS. Sold to a friend 10/08/08.
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