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