Cadillac Seville / Cadillac Eldorado Forum Discussion, 01 STS Periodic No Start in Past Cadillac Vehicle Discussion; Have a 2001 Cadillac STS with the 4.6L..here is the issue..can start it 5 times..starts and runs just fine..the next ...
Have a 2001 Cadillac STS with the 4.6L..here is the issue..can start it 5 times..starts and runs just fine..the next time you might turn the key..and nothing. Would describe as no power to ignition system. Yes, PCM, relays have been tested. No codes. Cadillac dealer couldnt even get it to act up. Help..I think it has to do with the security system.
Describe what you mean by "nothing". Does everything electrical work but the engine doesn't crank? Nothing electrical at all functions?
To clarify, there is no "older STS". The '05+ Cadillac STS is its own model. The '88-'04 STS badge is essentially a Seville trim level, it stands for Seville Touring Sedan. The correct forum for your car is the Eldorado/Seville forum.
When you turn the key over there are no lights, no sounds..just a black instrument panel. Its baffling. It doesnt happen all the time.
Can we standardize some terminolgy here?
With the key in the ON position, do you have a normal DIC display?
Does "when you turn the key over" mean holding the key in the START position?
Most car makers disable accessory circuits during engine START in order to make all the battery energy available for the starter and the engine controls.
"It doesnt happen all the time". Does that mean the engine fails to crank and start once every twenty attempts? Or once in ten attempts? Or....?
Okay..I started car normally. I let it warm up. I turned key to off position. Restarted. Shut off. I did this 4 times. On the fifth time I turned key to on position. The instrument panel was black, the car seemed to have no electrical power to it what so ever. I got out. locked door. reopened door with key. put key into ignition. turned key to on position. it started. The only thing I noticed was the security light would flash. I then shut the car off. restarted. shut off. and again tried to start. turned key to on position. Instrument panel black. no power to it what so ever. Car sat over night. this morning. have restarted. no problems. its very sporatic and it has been to a dealer. they were unable to diagnose as it didnt do a no start while there. My personal thoughts..its a glitch in the security.