When turning the key everything happens like normal....can hear fuel injectors...gauge lights etc blink, but it only makes one click and a rev up sound that then revs down when turning key off. I took battery to be tested it was good just needed a charge....but got it back in the jag and still the same problem. Battery is diehard bought 05/08....
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The good news is that it isn't compression or spark and the engine can run.
Borrow scanner and read OBD data. It may provide you the answer.without having to diagnose.
The first check is to see if the fuel pump is running?
You can usually hear it for 1 to 2 seconds when you first turn the key to the run position. It will have a little whine sound. No pump running on fuel pressure no start! You may need to have one person turn the key and the other(the one with the best hearing) lay near the drivers side rear wheel and listen.
The next check is to listen for the click of the fuel injectors.
Get the guy again with the best hearing and with the hood open take a rod between the top of a fuel injector and your ear and listen as the engine cranks. they will click once every other revolution. About once per second. No click no fuel no start.
Pump whine OK, injector click OK, need to check fuel pressure!!
Need to have a fuel pressure gauge connected to fuel rail and observe pressure. If the pressure regulator is bad or if the fuel filter is plugged or ice in fuel line or what ever no fuel pressure , yea no fuel no start.
Then your fuel pump is not working, or your fuel filter is blocked. You will probably have to check your fuel pump circuit if you have no fuel pressure in the fuel rail, where the injectors sit. There is a fuse for the pump, usually in the under hood fuse/relay block. That is probably also where the fuel pump relay is located. You should hear or feel this relay click when the ignition key is cycled from off to on. Also, when the key is turned to on, you should hear the fuel pump in the gas tank turn on for about 2 seconds. This will put the pressure in the gas in the fuel rail, for starting the engine. If you don't hear the pump turn on for that 2 second period, it is probably a bad fuel pump. But know the fuse is good first.
well you need to find out if it is spark or fuel giving you the problem check for spark first they have problems with the crankshaft position sensor which could be the problem not easy to get to its bolted to the bell housing with 2 bolts if you do not have spark that would be a good place to start
Are you certain that the pump is on when the no start occurs? Do you hear it turn on with key on, not start, when the engine won't fire? It should turn on for 2 seconds to pressurize the line to the injectors. If you could, check fuel pressure when the no start occurs.
If it is the injectors, buy a cheap "noid light" to check the injector circuit. Buy the one that fits your injector harness connectors. You pull off a connector to one injector and put the noid light in the connector. When cranking the engine over the noid light should be blinking-that is the pulse that fires the injectors. The injectors have battery voltage to them any time the key is on. When the ecm momentarily grounds the injector circuit (internally in the ecm), the injector is pulsed. If the noid light does not blink or even light up when cranking, the injector circuit has a problem in the power side or the ground side.
Same thing is happening right now on a 2002 Monte Carlo. When the key is simply turned to ON, all of the lights on the dash starts blinking rapidly. When I attempt to turn the car over, there is no CLICK or anything from the engine - nada. Ignition turns and the dash goes dark, as if it wants to TRY to start - but nothing happens. But, when I press the brake pedal (and the key is just sitting in the ON position), all of the blinking lights stops flashing and just stay lit. Therefore, I changed the brake switch, thinking it might make a huge difference. Didn't really help at all. When the key is turned, you can hear the fuel pump engage and everything seems to be ready to go. But, the car won't start (it will only start when it feels like it)...hit and miss, pretty much. Does anyone know the TRUE solution to this issue? Does the ignition need to be replaced in order to get this car to crank over
SOUND LIKE DEAD BATTERY.HAVE BATTERY CHECKED AND REPLACED.MAKE SURE ALTERNATOR CHARGING BATTERY.WITH ENGINE IDLING BATTERY VOLTAGE OUTPUT AT BATTERY SHOULD BE 13.5 - 14.5 VOLTS. IF NOT CHECK ALTERNATOR BATTERY FEED WIRE AND VOLTAGE REGULATOR WIRES FOR DAMAGE OR LOOSE CONNECTIONS,CHECK ALTERNATOR FUSE AND MAKE SURE ALTERNATOR DRIVE BELT NOT LOOSE SLIPPING OR BROKEN.
OK. We need spark-fuel-and compression to start (and we need these at the correct time) U will need to spark tester or substitute to check spark. Spark should be blue and jump at least 1" in lenght. Check for "Noid" light at fuel injectors. One side of injector is 12volt power and the other side is grounded by pcm to "spray" fuel. Do you hear the fuel pump? Also scan for codes. Does it crank normally...sounds normal?