Just replaced intake gasket, rotor and cap. Now runs rough and have code 0108. on 1996 Chevrolet S10

Truck starts hard, idles rough, has no power and brake pedal is stiff. ????

Asked by for the 1996 Chevrolet S10
PLUG your brake booster vacuum hose back to the correct port . With a vacuum leak that large you should be able to hear it.Just a thought , call me an idiot if you don't have a vacuum leak related to the brake booster hose.
1 more answer
P0108=Map/Baro sensor high input
I would check to see if there are any vacuum leaks and the order of the spark plug wires.
This code can also be brought on when there is a short in the wiring to the sensor as well as a vacuum leak
Good luck