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2004 Pontiac Sunfire (not starting)

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Hi

My name is Les need help trying to figure out a problem with a 2004 sunfire 2.2 eco 4 cylinder engine.  Have replaced ignition modual and ignition coil and fuel pump and also a fuel pressure regulator and have done tune up on it and it still won't start.....  Can any one help out please?

Verified Answer
  • Hi Les,

    I'm assuming the vehicle's engine will turn over. Check for hot spark on all four spark plugs. Check that the fuel pressure is between 50-60 psi.

    Have you scanned the vehicle for any related codes?

    Have you checked the crankshaft position sensor?

    CKP Test: Visually inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.

    1. Place an ohmmeter across terminals B and C. Set the ohmmeter to 1K-to-10K scale for this test. The meter reading should be open (high resistance) Replace the sensor if a low resistance is indicated.

    2. Make sure the Crankshaft Position (CKP) sensor is properly installed and the mounting bolt(s) are tight.

  • With a scan tool, you will need to perform the Crankshaft Position Variation Learn procedure.

All Replies
  • Hi Les,

    I'm assuming the vehicle's engine will turn over. Check for hot spark on all four spark plugs. Check that the fuel pressure is between 50-60 psi.

    Have you scanned the vehicle for any related codes?

    Have you checked the crankshaft position sensor?

    CKP Test: Visually inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.

    1. Place an ohmmeter across terminals B and C. Set the ohmmeter to 1K-to-10K scale for this test. The meter reading should be open (high resistance) Replace the sensor if a low resistance is indicated.

    2. Make sure the Crankshaft Position (CKP) sensor is properly installed and the mounting bolt(s) are tight.

  • Have not ck'd ckp...Need to know if this will reqiure timing reset if crank sensor is out?

  • With a scan tool, you will need to perform the Crankshaft Position Variation Learn procedure.