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Re: Car will crank but not start. Changed alternator and...
Begin with the basics, check all your fuses and relays. May want to check for fuel and spark. When you have verified all these, then check for any codes in your ECM.
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First thing is to see if the battery needs charging. If it has a full or near full charge, then maybe a loose or corroded battery cable connection is making the car seem dead..
You have to get the engine cranking at a normal rate or speed, to first see if it will start. If you get it cranking and it won't start, see if your fuel pump has failed. Best way to check that is to have the fuel pressure tested. No fuel pressure from a failed fuel pump is a major cause of a 'no start' condition.
Did you check for fuel pressure with a fuel pressure gauge before replacing fuel pump ? Did you test for spark ? Is there compression . Is the security light lit on the instrument cluster ? anti-theft system stops injectors from working if a problem is present. You changed the battery ? Battery Disconnect or Replacement Problems
Are you sure you have all wires on Starter and Alt, Have you checked fuses for fuel pump, check starter relay, Reason for changing Starter and Alt??? DID YOU DISCONNECT BATTERY BEFORE YOU STARTED REPLACING PARTS???
does it turn over but not start ? check timing belt,or do you have a fuel pump reset button anywhere ? could be something came disconnected at battery also or bad alternator ran battery dead ,or a bad fuel pump
There are few things that you will have to check.
1) Is the battery properly charged.
2) Are you getting spark at the spark plugs, when you crank the car to start.
3) Is there proper fuel in the car.
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If the battery is not charged properly the car will not start.Check the voltage of the battery .It should be exact 12volt.
If there is no spark coming when you crank the engine then its the problem of either the spark plugs or the coil pack.the spark plugs gets power to spark from coil packs.Also check the fuel pump and fuel filter.If the fuel pump and fuel filter are worn out then it will not supply the fuel properly to the engine and this results in no-start problem. If all battery, fuel pump and spark plugs checked out OK then its time to check the wiring connections between the battery to starter and battery to alternator.This will help.
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CHECK BATTERY VOLTAGE IT SHOULD BE 12.5 VOLTS.IF NOT HAVE IT CHARGED AND LOAD TESTED.IF ALL IS GOOD.CHECK ALTERNATOR OUT PUT.IT SHOULD BE 13.5 TO 14.5 VOLTS.WITH ENGINE RUNNING.IF ALL IS GOOD.HAVE THE STARTER SOLENOID AND STARTER CHECKED.IF ALTERNATOR OUT PUT IS LOW.HAVE ALTERNATOR REMOVED AND TESTED. DUE TO LOCKOUT FEATURE.MAKE SURE RADIO IS TURNED OFF BEFORE DISCONNECTING NEGATIVE BATTERY BEFORE REMOVING COMPONENTS.
did you already make sure the theft system is not triggered???? the security light will blink on dash, when the key is on. if blinking, email [email protected] for how to reset this.
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