PVSLS400

hey all I am in a situation and cant go any further. to start off i have done tons of searching between here amd LOC. First off my 90 ls had a wine in the power steering pump nothing bad or annoying but then i lost power then it comes off and on depending on its mood so i do a flush and clean resivor screen and the pps solenoid screen, Next i meter the sensor and get 7.0 ohms of resistance then i hook the sensor directly to 12v for a few seconds and feel it click. seems to be fine so i put it all back together and it does the same thing great steering accept when you come off the highway to the off ramp and steering gets hard accelerate up and its fine again. So i put a new Pump on and wallah no wine steering is silky smooth for about 10 miles my customer that wants to buy car gets in and takes it for a spin and it acts up again but no wine or anything but no power so i dive it and i have complete failure no power at all so i flush system again thinking some air got in magicly or i just didnt get it all out on the test drive. i go to the tech manual next and it states to replace rack so today i get new rack and waist 4 hrs removing and installing new rack and i think to myself sweet tech manual says 6 hrs to replace so i am ahead of the game here add fluid dextron III i am sure there is no air, fluid is at proper level turn the wheel and nada nothing.I know pump is working because it shot out fluid out the return line in great pressure. Hopefully some one has had the same problems and can give me some advise! my last resort is to fork out 300 for a new solenoid but i just spent 150 on pump and 440 on rack which is not the problem Help Help Help Help Thanks

DoubleWhoosh

could be stuff floating around in the lines. This is common unfortunately.

You are technically supposed to change the lines along with the rack so that there is no chance of anything contaminating the system.

Could try flushing it again but that's no guarantee. Sometimes it will go away for seemingly forever, sometimes keeps coming back nonstop. Just gotta make sure there is no crap in the lines.

PVSLS400

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