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Cadillac Repair/fuel pump replacement


1993 allante fuel pump replacement do yo have to drop tank


Yes, you absolutely do need to drop the fuel tank to change fuel pump. Not that big deal except for two potential caveats. #1 being as to how much gas is in the tank. A gallon of gas weighs approximately 7 pounds. Gas would have to be pumped out of tank.
#2 if the car has been driven in the winter in those God forsaken rust belt sates in the winter, like Iowa, Minnesota, Nebraska, Illinois, Wisconsin, Ohio, Michigan too name a few in the winters that employ chemicals such as road salt, calcium chloride and the like that instill rust. Obviously, one cannot heat up rusted nuts with a torch and are reliant on a good penetrating oil.

Be sure it is a bad fuel pump first, in which the engine cranks, but will not start. Many symptoms can cause this. and first and foremost, make sure the fuel filter is replaced on a car this old. Also when changing the fuel pump, get a new "sock" which is thee fine screen filter at the fuel pump inlet inside the tank. They are about $10.
If you need a fuel pump don't buy from dealer. Check out 1A auto parts who have many do it yourself videos (Very helpful), Rock Auto who have quality parts on the Internet. Autozone and O'reily locally is fine too.

I have owned a coupe Allantes and will be getting yet another. Great cars, and in m opinion much better than their MB counterparts.

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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