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Cadillac Repair/95 cadillac cranking

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Question
When cranking it acts like it doesn't want to turn over good, like a weak battery or bad connection, and then it cranks OK.  After driving it gets worse to crank.  Checked battery connections, replaced starter, new battery, checked fuses.  Does this year have a starter enabling relay?  Or am I looking at an ignition or ignition wiring problem? Thanks.

Answer
Hello Rodney,

Yes, your car has VATS for a so-called anti theft system. That is what that big ugly black resistor chip on the key is for.

The bad news-VATS is not your problem. If it was a VATS problem, engine would not turn over at all. You may have changed that starter, but to be honest the starter sounds like it is no good. If you had that much resistance in the ignition wiring which is only 10-12 gauge, I would think you would burn up a fusible link or start that wiring on fire.

I would suggest that you find out from a parts store how much amperage the starer is supposed to draw. Then by a cheap (under $10 ammeter)and put it to the battery cable and have someone crank the starter. If drawing $600 amps, that confirms your replacement starter is no go.

Before you do that though, disconnect the neg battery cable at the frame. File the frame, grind it, what even you need to fdo to make sure you have a eal good ground. Reattach the cable.

One other thought you might not like. Possibly the engine jumped time with a slipped timing chain.

Get back to me on your fix.

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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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