Mike Butler Hi mike my 96 Riviera starts fine and drives fine but when I go to shut it off the engine shuts off but the key wont come out of the ignition and the instrument panel is still powered up but if you wait a little bit they come out like there was never a problem and everything shuts of as it should
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Your flywheel may have broke or the crank could have broke. If the crank broke the engine is done. Try to turn the engine over by hand. You can put a socket on the crank pully bolt and try to turn it.make sure the key is off and out of the ignition. Sorry for your loss.
your key has a resistor built in (some call it a chip but it is nothing but a resistor) there are only about 10 different ohmages . On my 95 riviera I still had the key but it was worn. I went to radio shack, measured the resistance of the keys 'chip' and bought a couple of resistors to match the total needed, soldered them in line and bypassed the key "reader". No more problem. Maybe you have the same trouble. One "Pro" said ... "It's not a matter of 'if', but 'when' all GM products in that age group will fail in the ignition security and need attention.
look at the anti shudder valve (asv) look at pics on net. Its an air intake valve that shuts in order to stop the engine. It sometimes sticks shut. Syptoms are engines tries to fire but then turns over very freely but wont start. If it is this the whole air intake system needs de coking.
Pull off the fan belt and see if it turns over. the alternator or water pump may have seized up and that is what is preventing the engine from turning over. if it starts don't run it, shut it off and spin the pulleys on the fromt of the engine to see if they all turn free. Mike
sound like a faulty engine coolant sensor. if the computer gets a signal that the engine is overheating it goes into protection mode and shuts the engine off to prevent damage. have it scanned for fault codes. mike
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