Help! High idle and break pedal is stiff!

Vacuum leak.

The hard brake pedal is due to the high idle. You have reduced engine vacuum at high rpm's and lower or no vacuum assist in the brakes. You may need to reset your throttle position sensor or replace it altogether. If the tps is bad it will run at a high idle all the time.

I don't think I unconnected anything that I didn't put back, any idea which hose it would be?

The Jeep ran perfectly fine yesterday, Idk what I could've done to make the tps go bad..

JDeBlois said:

I don't think I unconnected anything that I didn't put back, any idea which hose it would be?

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I would start with the brake booster hose.

MJGALLINARO said:

If the tps is bad it will run at a high idle all the time.

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Factually incorrect.

As Tangofox said, go for the brake booster hose. Having either end of that hose disconnected will result in your exact symptom. This is the large diameter rubber hose that connects the power brake booster (on the driver's side firewall) to the intake manifold where it gets its vacuum which powers the booster.

TangoFox, Jerry Bransford, ya'll are geniuses. It must've come off when I was lifting the body. It runs like normal! THANK YOU.

Ya'll should get paid for this!