I HAVE A 2006 NISSAN MAXIMA 3.5 SE. THE CAR IS CRANKING BUT IT WONT START UP! IVE REPLACED THE ALTERNATOR AND FUEL PUMP AND BATTERY BUT STILL NO LUCK. AND FROM MY UNDERSRTANDING THE STARTER IS NOT THE PROBLEM..HELP MEEEE!!!!
3 things are required for an engine to start ~ A spark ~~ fuel~~Air The spark must be delivered at the correct time~~The fuel must be delivered at the correct mixture~~The air must be compressed to about 100lbs sq. in. ALL THESE MUST BE PRESENT .. OR THE ENGINE WON'T START... so what's missing? You have concentrated on Alternator (Has little or nothing to with starting) ,, Fuel Pump (good choice -- but your still uncertain the engine is getting fuel without a pressure test) Battery & Starter ( If they work then why change them?) Changing parts without testing (Shotgun approach) is not only expensive, frustrating but can introduce new problems that were not there before
so its the spark plugs right???
NO! The odds are that you are not going to repair the car yourself. This forum is for people with some automotive knowledge. You cannot repair an engine the way you have been doing. The only way to get the engine started is a disciplined diagnostic .. lets try this >> Do you have a spark? (remove wire from spark plug and put it on an old spark plug thats laying on the engine ..something metal so it conducts) then crank and look for spark