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need to check fuel pressure.
With out proper fuel pump pressure engine will not start or run. Here is a way to try to start engine. turn key on but do not crank engine over, turn key off, then turn key back on, do not crank engine over. Repete 3 or 4 times. This gets fuelpressure up to where it should start. Have fuel pump pressure tested. Replace pump as needed.
You need to have the pcm scanned for fault codes. If it is newer than a 1996 model, Autozone will scan it for free and tell you the fault codes. A mechanic would go from there, based on what the codes reveal. The low idle is probably a symptom of the fault.
Anytime the MIL light stays on with the engine running, the pcm (engine computer) has detected a fault and will turn the light on. It also stores a trouble code in memory, maybe called a pending code if only recently started, but the code can be found with a hand held scanner, hooked up to the port under the dash for code retrieval.
When you have done the repairs, and the old codes erased, you will see that the engine light always turns on when the key is turned on. If there are no more problems , the light will go out very quickly after the engine is running. It is a bulb and computer check that the light is on with key on, and stays on until the engine is started.
On most modern vehicles the engine cooling fans are electric. These fans are thermostatically controlled and will continue to run even after the vehicle is turned off and until the engine cools down. If you feel the fan is running an excessively long time after you turn off the vehicle, I would recommend you have it looked at by the dealer.
Good luck.
OK, if the relay for the A/C fan is bad, then the radiator's fan will keep running after turning off the ignition. Also, if the fan for ventilation of the A/C in the cabin stays on after the ignition is turned off, the relay for that is bad.
Turn key to run, click the engine but do not let it start then relax back to the run position. You will now see the security light on
After about ten minutes light will go off.
Turn key off and back on to run within 5 seconds
Repeat above procedure for a total of 3 ten minute relearns.
Sounds like the immobilizer. Does the key light in the dash stay on when you turn it over?
Immobilizer is the code that the key has (it's actually a radio frequency identification or RFID chip). If the key code doesn't match the car code, the car will turn over but won't stay running.
If this is the problem, you'll need to take the car to a dealer to get the key recoded.
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