Caddilac ignition locked

Sounds like you need a new ignition

Make sure your steering wheel isn't locked. Sometimes a key won't turn until you jiggle the wheel while trying to turn the key.

Nope the tumblers in the ignition cylender are worn and bent causing the key to be stuck. Ask any locksmith and they will agree
replace it with new lock cylinder

Try turning the steering wheel to the left and the right while trying to turn the key , you may have set the steering lock after installing the wrong key , you may have to turn it kind of hard each way untill the the key turns once it starts you shouldn't have any problems after that.

you dont have the car all the way in park!...or try pulling it to neutral and see if it will start

Hello foxrider.
Chances are when the wrong key was put in it may have damaged the lock tumblers.
The lock cylinders on these cars are enough of a problem using proper keys.Not very well made to begin with.
You could try a very light oil such as WD40 to lubricate the tumblers in case 1 may be stuck up into the barrel of the cylinder and gently run the key in and out several times.
Jiggling the key inside the cylinder will sometimes loosen them up too.
If you do get it working it may be a good idea to replace the cylider and key soon as it may fail you again.
I hope you succeed in getting it to turn, otherwise it may be a job for a locksmith.
Good luck with it.

KL

If your key turns to the start position and won't start but will if clutched and you can't turn the key all the way back to get it out, then you need to have your floor shifter cable adjusted. The cable may even needs to be replaced. If your key looks good and not worn or you have tried a new key, you have a tumbler in the lock assembly sticking. You may try a very small amout of dry graphite to see if that will loosen the tumbler otherwise you will need someone see if new tumblers will fix the ignition lock or if you need a new ignition lock assembly. I would think it is most likely the cable though.

this could be the ignition clyinder but try these tips first wiggle the shifter alittle bit and try it. if this works just keep doing it. and if it dont work try to move the steering whell side to side wile trying to turn the key

It sounds like you bent a tumbler pin.
You might want to try spraying WD40 into it, and trying the key (multiple times)
Otherwise you might just be stuck having to replace the lock assembly.

You might want to try calling a locksmith to see if they can do anything for you.