Cost for valve adjustment for 94 saturn SL2 - 1994 Saturn Sl

https://www.google.com/search?q=2002+saturn+sl2+idle+air+control+valve+location

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that means your rings, valves, or head gasket are going bad beyond the normal aging of all the cylinders. the number 3 was the first to go on my 91 DOHC too. the car is nearly 20, and that stuff happens with age and use. I would look around for a low mileage DOHC Saturn engine from a 94 SC2 or SL2. the engine is so old that to fix it you will have to rebuild it which will cost far more than the 500 dollars the whole car is worth. the same engine was in them from 92-94, possibly even a 95. make darn sure you find a DOHC engine and not the SOHC, they look almost the same but they are not interchangeable unless you change the transmission, the exhaust, all the wheels, and the speedometer.

possible that the shifting lever to the trans needs adjustment. could be putting car in reverse and not park. try in nutrel to start. i spelled that wrong time to sleep lol.

do tune up and clean throttle body see if that helps

Your valve body and possibly input shaft nut need to be replaced. The valve body's booster valve is worn down and won't create pressure. Before it went completely out it slammed on the input shaft nut and loosened it.

You need to replace the valve body and retorque the input shaft nut. The transmission is not junk. The above needs to be replaced and change the filter and fluid and do it every 20K miles.

Yes, with another transmission...they have a problem with the valve body going bad. Go with a junk yard trany. Just make sure that it has low mileage. $700 is a ball park figure...$700 for labor.

I would check the fuses and turn signal relay.
Then if the relay and fuses are good. The turn signal switch should be replaced.

Valve slash and clearance adjustments should only be performed by certified mechanics and is not a job for the garage or novice hands on type.
If you still decide to proceed, I suggest you get your hands on a maintenance manual which will list the procedure step by step, including proper torque values.

I do believe that that any SL series motor is interchangeable.
I just swapped an engine cradle from a 94 SL II with a cradle from a 2001 SL II.

Yes all cars have a switch that shuts off fuel in the event of a crash or roll-over, check your owners manual for more information, it is called an inertia switch, crash switch, or fuel shut off switch.