Very interesting web-site, it does look like this guy "cracked the code" on how to totally bypass the system, and for $37 plus some skill soldering you really do fool the ECM (Engine Control Module) into thinking that the key with the right resistor is in the column. I checked the shop manual from my former '94 Olds Cutlass Supreme and the connections look right, fortunately I never had this problem mainly because it never lasted 7 years! If I were having this problem I would definitely give this a shot.

Have you tried a replacement key?

Problem happens with both my regular key and my spare key which has very little use. I have also tried cleaning the contacts with out any luck. Resistance measurements on both key inserts is a consistent 9.5k ohms. I am sure that this is not caused by bad contacts or resistors on my keys.

I would drive to a reputable locksmith, and have a chat with him. Seems like the most options for the least money. Good luck.

Correct, not on the key resistor, but if you take the lock cylinder assembly apart you will find two flimsy fingers that are supposed to make contact with the resistor contacts. These fingers wear and get deformed over time and the contact resistance goes up, and when it goes up enough to put you into the next resistance level you get a no-start condition.

Don't forget we carry our keys in our pockets and then transfer lint and sweat into the cylinder and on to the contacts, you could try spraying contact cleaner into the cylinder then follow up with a light coating of powdered graphite on the key. Don't put graphite into the cylinder because if you use too much of it it may find its way to the fingers and form a path to ground guaranteeing that the module will think that you're trying to monkey with it and not allow a start.

If the problem is in the module or its associated wiring harnesses your only recourse after unseating and reseating the connectors (and some are in difficult to reach spots) is to get out your soldering iron and give this guy's circuitry a try.

Also try a good reputation locksmith on your area there are a few good fixes that they may be able to help you with. They run into this problem on a daily basis and also have access to info that most of the dealers don't. And can usually fix it, and sometimes it is in the ECM a few of my locksmith buddies have had a problem with their service vehicle's that have actually lead bacK to the ECM put a code scanner on it that might help diagnose the problem a little closer to the exact issue.

There may be a reset procedure similar to what my daughter's Jeep has. You put the key into the driver side door and turn it all the way clockwise and hold it for one second, then turn it all the way counterclockwise and hold it there for one second, then right again, then left again, and then unlock and open the door. The security system is now reset and the engine should start.

I found this after removing the battery for a water pump job on the engine. I couldn't start the Jeep until I reset the security system in this way!

I have always bypassed these systems by measuring the key resistor chip resistance first. Then find the 2 wires going to the ignition key reader contacts. Then cut the 2 wires and solder across the wires a 1/2 watt resistor with the same value as the key chip. If I recall there are like 10 different resistance values for these systems. There is lots of info on the web about this.

I was mistaken, there are 15 values. This site is a good info source; www.thirdgen.org/vats_passkey_system