Replaced the back brake pads on a 2000 saturn sl2 and not only does the car stall when coming to a stop but the brakes are hard to press in

check ur brake fluid level because you might have leaky rear wheel cylinders

that's a valve guide problem bring your car to a shop that who knows how to chance valve guide and also check the piston rings..that will help you solve burning oil

Could be plug catalytic con.

definately a vacuum problem, try changing your pvc valve its under $5.00 and easy

You could have air in the system.
The rear shoes may not be adjusted correctly.

Sounds like you may have a vacum line off the Brake booster or it may have just went out.

Front brakes on these cars are very simply.

1) Chock the back wheels and put the ebrake on
2) Loosen the front lug nuts (19MM)
3) Jack car up and place on jack stands, make sure car is secure
4) Remove front wheels.
5) Start on the drivers side and look at the top of the caliper
6) There is a bolt that the head is facing in towards the car it is 14MM
7) Loosen that bolt until it stops moving out, it is a slider pin and needs to be pulled out the rest of the way once the threads are no longer holding it in
8) Grab the top of the caliper (not the bracket the caliper bolts to the knuckle with) and pull towards the left till the caliper rotates down
9) Remove both pads by sliding them in towards each other and out of the clips that hold them
10) Take a C-Clamp and press the piston back in by putting one side of the c-clamp into the bore of the piston and the other side on the caliper outside and compress the piston till it bottoms out.
11) Remove c-clamp and the piston will stay where it is
12) Put new pads into the clips just the opposite you took them out.
13) Fold caliper back into bracket.
14) Lube the SMOOTH part of the slider pin you took out earlier with caliper grease. Get it nice and lubed, BUT NOT THE THREADS and reinsert the pin and push it in and then tighten it down, about 30-40 foot pounds is plenty. I think the manual calls for 32.

If you're replacing the rotors as well then instead of doing this first simply pull the entire caliper and bracket off by removing the two larger bolts on the inside of the bracket that attach it to the knuckle. Then hang the caliper and bracket assembly on the springs by tying it with wire so you do not put stress on the brake line.

Then do the passenger side.

When you put the wheels back on and get everything tight get in the car and continually pump the brakes to get them to contact the rotors again since they were bottomed out. The pedal should come back after 4 or 5 pumps of the pedal.

Bed in your brakes by doing a series (5 or so) stop from 50MPH to 5MPH and DO NOT STOP in between and then go on a drive to let them cool down and then come back home and park the car. Try not to hold the brake when you are stopped at all during this or else you won't properly bed in your pads and you'll have problems shortly.

yeah sounds like a bad alternator

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sounds like your breaks need to be bled.
if it still is kind of spoungy then the routers are bad.

check and see where he jacked the car up. he could have smashed the fuel lines