Re: engine will not rotate when you turn key switch.
Bad battery, starter, starter relay. Anyone of those could be it. If it clicks and the battery is good than usually the starter is bad. If you know the battery is good take out the starter and have it tested. If it is bad than replace it. Local parts store can test starter. If starter is good than swap a good relay with the starter relay and try again.
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The fuel pump should turn on for a couple of seconds just by turning the key to run. It has nothing to do with rotating the distributor, and I don't know what you mean by that?
When the engine computer senses the ignition key has been turned to on, it will send a signal to the fuel pump relay for a couple of seconds, and the relay being energized is what makes the pump turn on. The relay acts like an on-off switch. when its coil side is energized, the relay is "on" and will transmit power-in this case to the fuel pump. That two second run time lets the pump prime the feed line to the engine and put it under high pressure.
I guess you have throttle body fuel injection? The pressure called for that is less than for multi-port injection, that is about the only difference.
Explain fire ? Ignition spark , engine turning over when key is moved to the start position . It depends on the make vehicle . Back in the old days voltage from the ignition switch when placed in the start position would go through the park neutral switch to the S terminal on the starter solenoid . Causing the starter to spin the engine over . Then the ignition system would have the job of firing the spark plugs causing the air fuel mixture to ignite causing the engine to start an run . Do you have a no- crank no start condition . Sometimes I don't know what you rookies mean , I have been fixing vehicles for over thirty years an you rookies don't talk the same automotive language automotive Technicians talk.
What most people refer to as the "Ignition switch" is really the "cylinder lock", that when turned with the key, operates the actual "ignition switch".
The switch causing your problem is inside the steering column, and the column needs to be at least partly disassembled to access it.
If it stopped in a second, the cause is electrical problem. If it stopped more gradually, over several seconds, it is usually fuel related. If you put the key in the ignition and turn it to run, not start, are there lights on the dashboard panel? If you turn the key to the start position, does the engine rotate? Sometimes I have to turn the key to start position several times before it works and the engine rotates.
Something to do with the PASSLOCK system - anti-theft . Loose passlock sensor or key . Thing's do wear out after time . The passlock sensor is part of the ignition lock cylinder housing .There is also a magnet in the lock cylinder an when you turn the key the magnet rotates past the sensor causing a voltage signal that the module in charge (BCM) reads ,worn or sloppy fitting parts are probably the problem . Your vehicle is 14 years old , just think of how many times the key was stuck into the ignition switch an turned . Don't know of any by-pass fixes for this , look on line . Or you probably would have to replace the whole lock an lock cylinder .
hi from uk the switch you mention is called the inhibitor switch which prevents cars engine from being started if in gear but allows starts only if in either neutral or park mode question? do you hear click on key start position? or just nothing? may i suggest you check the starter solenoid which is on starter and has positive cable from starter attached along with a thinner cable? also you will/should see a thin wire also connected to the solenoid on a seperate teminal this is the wire from key start ign switch and when key turned to start energises the starter into operation /turn engine ensure this wire is clean/secure? one other thing to check is the earth/ground lead that runs from chassis/body and connects to engine usually in vicinity of rear of engine? all above is assuming that your battery is ok?? hope this helps?