1993 Buick Century no spark

1993 BUICK CENTURY
100,000 MILES • 6 CYL • FWD • AUTOMATIC
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JTJELLE
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  • 1 POST
The car was running fine. It sat for about 2months outside in the snow and cold. Now it will not start and has no spark. I changed out the coil packs, and the crankshaft ignition sensor. I checked the fuses and have power to the coil pack. I also changed the ignition module and still no spark.
Jan 1, 2009 at 5:21 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
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Recheck the CPS see below

To diagnose crankshaft sensor, the following procedures can be used:

If a scan tester is available, scan RPM parameter while cranking engine. If RPM is indicated, crankshaft position sensor is operating properly.

If scan tester is not available, disconnect crankshaft position sensor harness connector. Set ohmmeter to 2-k/ohm position, and measure resistance across sensor terminals. Resistance should be 800-1200 ohms.

Set voltmeter on the 2-volt AC scale. Crank engine and measure output voltage across sensor terminals. Voltmeter reading should be .8-1.4 volts. If resistance reading is not as specified or sensor does not produce the specified output voltage reading, repair faulty wiring or faulty crankshaft position sensor.
Jan 3, 2009 at 4:05 AM
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FREDWARD
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I suspect a bad sensor and need to test it, but it has four pins, and these instructions don't say which ones to connect the meter leads to. Does anyone know?
Jan 5, 2011 at 12:04 AM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Fredward, I don't have the flow chart for your CPS testing
Feb 3, 2011 at 6:24 PM
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