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Hello, I’m new here but wanted to take the first step toward posting. As you can see in the title I have a 1991 Grand Prix. I just finished getting my DIY exhaust mocked up and ready to weld and I will try to post pictures of it soon as well as other things. I have all new KYB struts and just ordered the rest of the parts I need to build rear coil overs, with the intention of lowering the car a lot. Will start a thread on that soon. Glad to be here.

Pretty sure every one of these cars use this

yes indeed...

It's a misconception that one or all need to *go to* Birchmount Spring here near to me in Toronto to get a replacement steel leaf spring for their car. Any spring shop can fab up a replacement multi leaf arrangement, the shop just needs to know what spring rate you want, how many leaves you require (the fewer the better ..more than 1 leaf), the total length of the leaves, the ride height you're looking for. What you see below is what is under my car...the shop I approached arched the 2 leaves to the right height I wanted, seeing as this is a transverse spring each leaf on each side has to be tweeked to ensure that each side of the car's ride height is identical.

*It basically adjust the steering feel when going thru a parking lot and then tightens up when on the highway or Interstate*. almost......lol, not quite.... the sensor is there to 1. disengage the a/c .... 2. send a signal to the ecm to raise the engine rpm when the vehicle speed is so slow that the engine rpm is to low to adequately assist the needed power steering pressure. When the pressure in the system drops to a pre determined pressure that switch opens, the ecm *sees* that & raises the engine rpm to increase the pump rpm & power steering pressure. The sensor is referred to as Idle Speed Power Steering Pressure Switch