1996 Saab 900 SE is stalling and shuts off when I start to come to a stop. Engine light came on with an !. Couple times it would start and just die. had to hit the gas to keep it going. sometimes this worked and other times it didn't. There looks to be corrosion at the bottom of the battery. Terminal posts are clean and on tight. Any suggestions?

https://www.dtcdecode.com/Saab/P1513 https://www.autocodes.com/p1552.html your p1552 is possibly causing the other code if keep driving the high output can cause other components to fry and or can cause stalling/no start

Have the altenator checked out. when you turn these on it puts an extra load on the altenator. Could be loosing voltage or amperage, And the ECM could be shutting you down because of this drop.

1996 SAAB 900 SE Brakelight Failure SID info
- stalls in reverse etc.

The problem lies with the grounding point in the left rear body cavity on the floor, see the diagram.
Rust eventually destorys the ground and the car will not run in reverse nor do the backup lignts or the rear hatch defroster work amongst other things
Re-attach the grounding wire to an existing welded stud on the side body panel and the problem is solved.

It appears to me to be more of a loose or damaged battery or ground connection, either on the battery, the starter, or a power wire somewhere. Next time you have dim lights, get under the hood and wiggle wires around, to see if you can get them to brighten up. When you do hit the right wire, you'll find the problem.

This is probably a CPS sensor.

If it is a turbo, check the Turbo BypassValve. Also check all vacuum hoses, after 100 Kmiles replace them all.

driving up hii driveway the cr stopped it won't start

sounds like the timeing belt is bad.

problem lies in the low idle switch - sorry this is a dealer issue

dirt in tank and float is loose in tank - was it removed in past- sounds like tank has been replaced