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Cadillac Repair/1989 eldorado
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Question
QUESTION: new fuel pumpis not runing ran a wire from batrey to pump it runs new fuel pump relay but pump wont start when i turn on ignition
ANSWER: Hello,
Not sure what to tell you here. Ignition anti-theft system did not start until 1990 production to my knowledge.
Did you look at the owner's manual to determine the fuse locations? Did you check all fuses? When GM used the VATS in 1990, system was designed to shut off fuel pump as well as cranking ability.
Its been 20 years since this vehicle was produced and I have nothing for diagnoses on this vehicle.
If you check all the fuses and find they are all good, you may have to attempt to acquire an electrical service manual on Ebay or Craig's list to properly diagnose.
If equipped with a factory alarm, may have something to do with your problem, but I doubt it because your lights would be flashing and horn would be sounding.
Good Luck and I apologize for not being more exact on your problem.
Rob
---------- FOLLOW-UP ----------
QUESTION: i measured resestance at chip key aan bypassed vats before that the ignition would not starter over i dont know why the fuel pump is not on i have spark i ran a diagnosis get bcm codes but get no ecm data mayby a bad ecm? thank you starter is turning over getting power to tps conecter
Hello,
Well, if your 89 Caddy Eldo is so-equipped with the VATS, my reference shows the VATS started in 1990.
If you bypassed the VATS correctly, not only will the engine crank, but fuel will be supplied as well because bypassed the VATS features are moot.
I don't know why you are not getting fuel.
Rob
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Rob Painter
Expertise
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?
Experience
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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