Cadillac Repair/no firing


I have a 1994 cad Seville. I have replaced the module--distributor-coil-and had it timed. Some say it has a crack shaft sensor--bought one--still no fire--what can it be? It has a 4.9 engine---no codes showing up on it.


As you are finding the hard and expensive way, guessing what the problem is just does not work on computerized vehicles. You will never fix the vehicle that way.
How do you now it is not a fuel delivery issue? Many things electronically can go wrong without offering a diagnostic code.
Look, I am not at the vehicle and it is anyone's guess as to what your problem is.
I would recommend going to Ebay or Craigs list and obtaining a 1994 Cadillac Seville factory service manual and use the diagnostic flow charts to walk you through the problem without guessing and replacing perfectly good components.
What you are doing a dealer will do as well as include labor and never fix the problem.
The other option is to take the vehicle to a reputable service center.
I am curious as to where you obtained the suggestion of a cam sensor, module, distributor and coil. The Internet?
There are many things I am capable of diagnosing over the Internet, but driveability problems, no one without using a manual and possible a tech II scanner can repair without being at the vehicle. Such information is irresponsible and leads the car owner on a costly goose chase.
Get a manual, it will save you lots of money over the coming years.

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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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