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Cadillac Repair/97 seville sts Error Codes


I have a 97 STS i am trying to get it running. I charge the battery and reconnect it to the system, the interior lights, and radio come on. As soon as I turn the ignition switch to the on but not start position, the power drains out of the battery, and the inadvert power relay starts ticking. my code tester cannot read the car because the power is to low,all of this in less than 3 minutes.
the battery is less than 1 yr old but was 1/2 dry before i charged it.The battery before this one tested for a dead cell while still  under warranty.
I dont have a clue what to do.Please help

ANSWER: Hello,

I question this battery already because if it wasn't the probem, and the battery is discarged in 3 minutes you would have a short on a major cicuit which would either blow a fusable link or start a fire.
Your battery is already suspect from your description and should be full when installed and you have no choice but to start at the simplest point and install a new  battery and go ftom there


---------- FOLLOW-UP ----------

Finally got it running, and this is what I got.
The on board error codes P0300,0108,0603,1599. My code
reader picks up P0301. She has to be hit with starting fluid
to start cold, hard to start after being warmed up for a few
minutes, and won't start until it cools down after it has
been driven until it is completely warmed up. If I push down
the accelerator past 1/2 quickly the engine almost dies(acts
as though starved for fuel) and while idling it will slowly
flood until it dies on restart the engine speeds up like it
was overloaded with fuel for just a minute or two and then
the cycle starts over with the smell of unburned fuel coming
out of the exhaust. It will loose power while driving,
backfire loudly, and then drive ok for another hour or two.
Since purchasing the car it has lost a huge part of it fuel
mileage 15 to 20%. Any direction or advice would be greatly

Thanks Rich

Hi Rich,

Please do not use starting fluid on this aluminum engine. Very dangerous! You can blow a cylinder head off or more! Put gasoline in a spray bottle if you must do this. Ether is meant for non combustion engines such as diesels.

From your description, I have no idea as to what is going on. Running to rich will destroy the catalytic converter. When is the last time you changed the fuel filter. Diagnostic code readers have limitations and caveats. The are not a cure all and you could never find the problem. Codes can cascade and one code might set off another. I realize money is tight these days, but in your case, it might be best to take the car into a service center with a tech II diagnostic scanner (Not a dealer). Your problems can be pinpointed with the tech II. This way you can find if its an electronic problem or a fuel delivery problem. I don't want to see you wasting money on a guess and it can happen.

Let me know what happens. Good luck!

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Rob Painter


Alarm system questions cannot be answered on this forum. These systems are not what I can answer. Without being physically at the vehicle and not knowing what kind of electrical service has been done on the vehicle, there is no possible way to give an accurate answer over the internet. My expertise is in Ignition/key based anti-theft systems. These issues include GM VATS (resistor chip in key blade) PASSLOCK (MRD)-ignition lock rotation based, no special ignition key and the PKIII Transponder (computer chip in key) systems. These systems are not alarm based and are integral with the starting of the engine. This is why I cannot diagnose alarm problems without physically looking at the vehicle: Alarm systems are a completely different annimal than ignition key/lock based anti-theft system. Many alarm questions come from vehicles 10 years old, and since older, many hands that had been involved over the years.I am an expert in all GM factory (ignition/key based)systems. Alarm system questions pose to many situations beyond my knowledge as to what has been done to the vehicle over the years. Some guy may have actually wired the stereo into the alarm system. Who knows? Over my past 30 years in vehicle wiring repair, I have seen unbelievable wiring disaters done by guys that consider themselves "mechanics." I have seen stereos and alarms intalled using surgical tape. I have seen modules burn up, un-fused circuits, wiring jambed between the doors and even lamp cord used for a starter kill. To answer alarm questions over the internet without examining the vehicle is like asking; What does it take to remove a dent?


Education/Credentials-ASE certified. 11 years with a GM dealer and 17 years with a repair facility dealing with only the repair of theft recovered vehicles.

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