1998 oldsmobile won't start. its not the fuel pump checked it out the pump is fine and so is the fuel pump relay. i'am not getting any fire to the wiring harness that goes to the fuel pump

have you checked fuel pump relay?

Check your coil on plug if dtill functional, also plugs themselves.

My routine to check non-starting motors: (petrol/gas models)

• Check immobilizer status
• Check fuel supply -does it reach the fuel rail when starting. If not OK, check 12v supply to fuel pump when starting. If OK, fuel pump maybe dead.If not present, check fuel pump fuse and relay.

• If fuel supply is OK, check spark ignition. If not OK, follow the supply circuit backwards to the ECM. Coils and/or ignition amplifier connector should have one 12v supply to it when ignition switch is on.

For Diesels with 'common rails' you can take same approach for fuel. No ignition testing possible. The diesel fuel pump still needs battery power. It will make some sound when IGN is on. If not, check ALL fuses and relays.

check for spark.. if no spark replace autoshutoff relay it controlls fuel and fire..

fuel pump going out and it will not run at all
coil problem will starteasy but fail after running for a while
fuel pump relay again it is running after starting and if the relay is no good , it will not pump fuel
try having the fault codes read first then have the faulty sensor replaced

fuel pump relay or fuse to the relay

CHECK FUEL PUMP AND FUEL INJECTOR FUSE AND RELAY.IF BOTH OKAY.CHECK FUEL PUMP WIRING.COULD BE BAD GROUND WIRE.SCAN CAR FOR FAULTY THEFT SECURITY SYSTEM, PCM AND CAM SENSOR SINCE BOTH FIRES THE FUEL INJECTORS.

4 important things for a no start to check.Power from the ignition switch.Power at the fuel pump relay.Fuel pressure,spark at the plugs and a signal leaving the crankshaft sensor {distributor}. etc

check the fuel pump relay... it is located under hood in fuse box

check the asd relay in fuse box under hood look very close at contacts if replacing fuse does not fix wires in box may be burnt under neath