Question about 1995 Buick Roadmaster

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I needed a new pass key for my 1995 buick roadmaster, and i got that but i noticed that the little computer chip is lose,so when i got ready to use the key i got the same problem car not starting. Everything eles is working properly from the starter to the ignition switch/ wires. So does this mean the key is bad ? as i said the little computer chip is very lose.

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  • 347 Answers

First off when you had the new key cut did the use a tester to find the number of the chip in the original key, if the numbers don't match it will not start.If you did not have a key they would have to hook up the tester to the car to read the number programed in to the pass key module..With all that correct GM has had many many issues with the ignition cylinder ( not the ignition switch which mounts down on the steering coloum) .On GM cars their are two very fine wires (orange) going from the cylinder to the module one of these wires often break the same tester that checks the key number also checks this issue but without it all you can do is a visual inspection of the cylinder the wire brakes right at the cylinder I know it sounds like a lot but without the special testing equipment the the dealer has these are not easy to diagnosis... Good Luck

Posted on Oct 13, 2010

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Why does my 1995 roadmaster 5.7 lose power up hills starts and idles fine changed plugs opti spark cap and button and somtime it pop s back through the throttle


I didn't see any mention of the fuel filter being changed. Nor do I know your driving habits to help determine the possible problem.

That being said, I would change the fuel filter as I've had 2 vehicles that acted somewhat the same way as you described.

Both vehicles idled fine. They both ran good up to the point when there was more of a load put on the engine, i.e., up a hill or attempting to get up to speed on the highway.

Hope this helps.

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I don't have info on that code, so it may be specific to Buick. The passkey uses a chip which the computer in the car "reads" to make sure the owner is trying to start the car.
The ignition lock has a sensor that picks up the chip in the key. I would try a spare key first to make sure the problem is not the key. It could also be a problem with the lock cylinder or the module that stores the code.

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To pass out means to lose consciousness due to a sudden trauma. More diagnostic tools for car.

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1 Answer

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That's exactly why it won't start. You can either switch the ingition lock back to the original one so you can use the right key. Or, you can sync the new key with the computer. To do this you or someone else will have to use a gm tech-2 scanner, snap-on modis or an otc genisys scanner. Your local dealer or good repair shop should be able to fix you up. Now, there is another way. The passkey system works on resistance from the chip. In you steering colum there is a 2-wire plug going to the ignition lock. If you pull it out of the colum and cut the plug off. You can pop the chip out of the original key and solder the wires to it. Just make sure you don't heat the chip up to much. After doing this you can use any $10 standard gm ignition lock instead of the expensive ones that use a chipped key.

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