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Old 08-25-2016, 12:27 PM   #2
fdryer
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Join Date: Jan 2006
Location: NYC
Posts: 45,208
 

2003 L-Series 3.0L Sedan
Default Re: 2003 Saturn Ion Turns over but doesn't start

Did you go over the car carefully to see if anything was damaged when it went over the bump? If severe enough, was anything loosened and rattling? What condition are the wires in (engine wiring, fuse box, etc)? Did you check for blown fuses? Doing a simple check after an incident that may or may not be related can sometimes reveal simple repairs (blown fuse, loose wiring, etc). With a no start issue, most problems are either fuel or ignition related.

Presuming fuses are good and all wiring is fine, is security off during starting? You have two ways to check for fuel and spark; spray starting fluid into the throttle body and try starting or perform procedures to isolate fuel and ignition. Spraying starting fluid may be the quickest test otherwise you can try the longer procedures next. Starting fluid helps to determine whether a problem is fuel or spark.

When ignition is turned ON (engine not started), fuel pump operation runs for two seconds then shuts off. You might be able to hear a quiet hum/hiss sound of the fuel pump or locate the fuel test valve on the fuel rail by the engine. Remove the black plastic cap to reveal a schrader valve (same as tire valve), cover loosely with a rag while depressing the valve stem expecting fuel to spray out. Fuel spray means fuel and pressure are available to injectors. The engine computer operates injectors. A spark test is next and requires either removing the ignition control module/coil pack assembly and plugs for reassembly over the engine to observe for spark while starting.
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