WAS RUNNING FINE THEN ACTED LIKE IT WAS OUT OF FUEL.
1989 Cadillac Fleetwood
October, 20, 2011 AT 3:19 PM
1989 cadilac fleetwood 4.5liter will not start. It is getting gas and fire, the car was running great then all the sudden acts like its out of gas. Checked the injectors getting fuel. Checked spark getting fire? Now it will not start at all just turns over.
Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing
If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems
with compression and valves opening and closing at the wrong time/broken or jumped timing