Okay, I am working on a 1996 buick park avenue ultra. The owner said that it died at a stop light, he tried to start it again and after several cranks it eventually started up again. He drove it home and called me to come take a look. A few days later I arrive to diagnose the problem. I ask him to try to start the vehicle. It starts right up and sounds like it is running perfectly. I have him turn it off and restart the car and it just continues to crank without turning over. He continues until the battery is almost dead and still no start. I am getting spark to the plugs and plenty of fuel pressure from the main fuel line. I changed the plugs, which were all consistanly carboned up, the fuel filter by the tank. Still no start. When cranking the engine I am hearing a unique sound. Sort of like rur, rur, rur, rur. 3-4 sec. Pause rur, rur, rur, rur.3-4 sec. Pause rur, rur, rur, rur. Over and over consecutively with my jumper cables connected. I have thoroughly cleaned both battery post connections as well. Also I have a blinking security light on the dash that the owner claims always did that, but I bet he is not totally sure about that. The dummy lights seem to be flashing speratically as the engine is cranking over. The supercharger is spinning with little resistance as it should with the belt removed and the oil level is full. I am at a total loss as this engine does not have the conventional distributor, but rather electronic ignition. No check engine light is coming on, so I have not pulled any codes as of yet. Should I anyways? I am not sure what to diagnose next but I am committed to finding the problem and am experienced with an ohm meter and would love to get some direction on where to look next. Thanks a million!
Thursday, November 29th, 2018 AT 7:42 PM