98 Maxima replaced clutch, now wont start

[packers_1]

I am new to the fourm. I have problem and just looking for some insight. I took the car to a nissan dealership and the just tried to rip me off. I replaced the clutch with an aftermarket clutch and tried to start and would crank over but not fire, all it would do is back fire through the intake. Then i put in a OEM clutch and still same problem. I have tried starter, maf, map, crank reference(under crank pully), sparkplugs, crank postion(in transmission right by flywheel) and oil pressure sensors. When you jump start it it will start fine, some times it will fire but rarely. I have not figured it out for a month now and hope you can give me some insight. PLEASE.

[MinisterofDOOM]

Have you checked the clutch interlock (prevents the car from starting if the clutch pedal is not depressed)? It's located at the bottom of the clutch pedal mounting bracket. There's a threaded lock nut to adjust the point of engagement.

[loystock]

The fact that you can crank the engine means the Clutch Interlock Switch and associated relay and the Theft Warning Relay (control from from BCM) are good. So the problem must be somewhere else. Most likely you have a poor/dirty battery connection or weak battery. A good battery should read >12.5VDC (Alternator charging voltage spec, 14.1-14.7). A weak battery may not crank the engine to the required RPM to initiate combustion.

Check the fuel delivery - fuel pump (fuel tank, accessible from rear seat, pax side), Fuel Pump fuse (fuse box near steering column) and fuel filter (firewall besides brake booster). Fuel pressure must be at 34 PSI with engine running or 43 PSI with vacuum removed (or Ignition ON with engine OFF, auto shutdown after 5 secs).

You may also need to have the car scanned (OBD II) for trouble codes.

[packers_1]

The battery is brand new and if it was fuel related, than why will it start with a push and poping of the clutch and run

[loystock]

Since you can start the car with manual push and clutch pop points to starting circuit problem - battery, battery connector, starter relay, starter motor and starter solenoid. You may have a new battery but it could be depleted - not enough juice to start the car. Poor battery connection connection/corrosion is a common cause of starting problem. If the battery and connections are good, then check for voltage to the single-wire connector going to the starter motor, when Ignition Switch is in START position. This will ensure that the interlocks and starter relay are working.