99 Infiniti I30 Please Help

[quezzz]

The Problem is that is won't start. Yesterday I drove to 3 different locations(all within 30 minutes), where it showed no problems at all. Then after I came home to let my girlfriend use the car to go to work(about 15 minutes after I returned home), the car wouldn't crank at all. I've had every major component replaced over the years(mass flow, water pump, alternator, fuel pump, coils) and the car has 166,000 miles. Could someone give me an idea of what the problem could be. The car sounds as if its about to crank but the rpm gauge isn't moving. No check engine light showing. What could this be?

[tigersharkdude]

Starter? Turn your headlights on, turn the key as if trying to crank the car...do the headlights die?

[quezzz]

No I'm sure its not the starter. I've had that replaced also. The car will turn over but won't crank.

[loystock]

Since the engine turns but won't crank, electrical circuit must be good and the problem may be with battery, cables and connections or starter. You can also have a fuel delivery problem. When was the last time you replaced the fuel filter. You can also check if the fuel pump is operational. Turn Ignition Switch to ON (don't start) and listen as the fuel pump runs/hums for 5 seconds then shut down (fuel pump is inside the fuel tank and is accessible behind the rear seat).

Going back to the electrical aspect, ensure your battery connections are clean and tight and that there is no corrosion on the battery cables. Check the condition of the connector to the starter. A good and fully charged battery should read 12.6 VDC or more. A hydrometer can be used to measure specific gravity of the electrolyte -1.265 for a fully charged battery. If the battery voltage is less than 12.5VDC, it is weak. If the battery voltage is 12VDC or less, it is 'dead' and useless for starting. Try jump-starting the car..if it started, you need to buy a new battery.

If the battery, cables and connections are good, then starter is suspect. Did you buy a new or refurbished/rebuilt starter? Some refurbished starters are not properly serviced and don't have enough lubricant in the gears or the rotor-stator are gummed up.This can cause starting problem. You can take out the starter and check it yourself or bring it to Autozone and the likes for free testing.