1655 is an evap purge code ,evap solenoid is under the hood,plastic lines
with a green test cap in the line.
SOURCE: 1997 pontiac grand prix gtp power steering
I had this exact car and I had all the same problems your talking about, The pump although I can't tell you for sure is on the left side of the engine as your looking at it. If it is whining it is because it is low on fluid, also when topping it off fill it to the full mark while it is running. If it is foamy turn the steering wheel all the way left and all the right a few time to help get rid of the air. You may have to let it sit a while to let the bubble escape, check and do this again, it could be a bad pump also. The overheating problem I had with mine was a bad temp sensor for the computer. It has two temp guages and the computer uses on to activate the fan as needed. I also had another problem with mine, on the front of the intake is a small plastic elbow for a heater hose and this goes bad. Had to replace mine. Wasn't hard, and the part was cheap. Hope this helps you!
SOURCE: 1997 grand prix gtp starter location
at rear bottom of engine, u must change it from the bottom. Make sure the battery is disconnected before u start work.
SOURCE: 1998 pontiac grand prix gt service engine soon
P1133 HO2S Insufficient Switching Sensor 1
THIS IS THE O2 SENSOR CLOSEST TO THE ENGINE AND BEFORE THE CONVERTER.
AN EXHAUST LEAK OR A BAD SENSOR COULD BE THE PROBLEM.
CHECK THE O2 SENSOR WIRING FOR DAMAGE, CORROSION, ETC.
SOURCE: 1997 pontiac grand prix GTP that will die while im driving
I would start by replacing the Crank sensor and the cam sensor.
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