Cadillac Repair/91 seville

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Expert: - 3/10/2011


Question
i have a 91 seville an iv been in out the shop with it an the mechanic told me i may have to get a new tps kinda know lil bout it but so fa r not sure what to look for on fixing the problem cuz i been told it could be my fuel pump but my car has lag on acceleration an sometimes down shifting on the accelorator an very much hesatation on picking up speed please help me to figure out my problem

Answer
Hello,

I am not trying to be a smart guy here, but I think you might consider having someone more qualified to look at the vehicle. Sounds like too much guess work here. Before ever figuring a fuel pump, I would always go with the less expensive alternative of a fuel filter that should be changed every 60,000 miles. Even if the fuel pump is pushing, a clogged filter will restrict it and it is a maintenance item. I am not telling you this is the problem. I am telling you with the garbage quality of gasoline these days, it is something to be considered.

Try going to a service center that has the equipment to take the guess work out of this thing.

All too commonly, technicians will not admit their short comings. I have never been afraid to say I don't know. A TPS is expensive and on the other side of the system, a fuel pump is expensive. Why guess?

Just my opinion.

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Rob Painter

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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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