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I have a 1996 Chevy Tahoe, that isn't starting. I have changed plugs, wires, rotor, cap, crank sensor, and ignition control module. I still don't have a spark. Before the truck shut down, I could go 40 mph for about 15 sec. Could it be the fuel pump?

If you don't have spark your fuel pump will not work! (The computer won’t let it work for safety reasons!) First thing you must determine is, "Why does it not have spark to the spark plugs?" In most cases the Crankshaft Positioning Sensor (CPS) COULD be your problem! Here is a test you can do to determine if the crankshaft sensor is working without any special tools. 1) Watch the "Tachometer" on your dash while you crank your truck. 2) Do you see it move (Tachometer needle) when you are cranking the truck? If not, the Crankshaft Positioning Sensor is more than likely your problem. This is the first step in checking a "No Spark" condition from just about any car/truck on the road today. If you don't have a tachometer on your truck then you will need to find a shop that can access your computer using a scanner or laptop computer. Look for the Gold ASE Emblem on their shoulder patch. This tells you they are certified in ALL 8 areas of car/truck repair. This way they can fix it right, the first time. Remember: A good automotive repair shop is not expensive, they are priceless!

 

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