you need to check the fuel presure,,,the fuel pump may be weak,,these must have no less then 60psi at all times
Test Description The numbers below refer to the step numbers on the diagnostic table.
Notice: Do not allow the fuel pressure to exceed 517 kPa (75 psi). Excessive pressure may damage the fuel pressure regulator.
The Vehicle Control Module (VCM) has integrated IC circuits that are fault protected; therefore, if a circuit has failed, the integrated IC may not be damaged. If that is the case, the IC will keep the circuit open until the fault in the circuit has been corrected.When the fault has been corrected, reinstall the VCM and check the circuit. Replace the VCM only if the circuit is still inoperative.Test Description The numbers below refer to the step numbers on the diagnostic tables.
i think this is where it just has enough ignition to caus ethe engine to kick back when it fires on the compression stroke,,,if thepresure checks out we will move on to something else