have 1997 chevy truck 5.7l v-8. will not start. hear fuel pump cycle for 2-3 secs. tried starter fluid. grounded spark wire and saw orange spark.after cranking motor the crank goes the opposite direction for about a 1/4 turn. motor has 130000 miles on it. was running good before this except gas mileage dropped off. tried new cap and rotor no change. any thoughts roaddog in perryville mo.
Year : 1997Make : ChevroletModel: 1/2 ton 4x4 truckEngine: 5.7l
rotor and cap
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 will do a fuel pressure check. what about the crank going in the wrong direction after you stop cranking the motor?
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
owns a repair shop...25yrs
thats what i was thinking thanks for your help i will get back to you if further help is needed.