I was driving on the local streets and my car began to sputter and it would not speed up and it would stall,if i turn it off and started again, it still not speed up, some times it does not start up, if i waited 20 to 30 minutes, it would start up again and I began to drive. It started acting up again and stalled. I had a similar incident about last week. After circling the local streets(for testing purpose after replacing the fuel pump) same thing happed after 40 Mins,It seems like when car reaches to certain heat level, it would be very hard to speed up and finally not move at all, my friends told me it's either the timing related or the crankshaft sensor.

I'm assumieng that you are talking about 2000 Nissan Altima... Are you check any OBD fault code there?

To me, sound like that either the fuel lines are cloged up and need to be replaced or cleaned out. Or it's your fuel filter that is dirty and needs to be replaced. I am almost certain that it's one of those things. I would first RE-CHECK the fuel filter and replace it before you replace the fuel lines as they would probably be more money to fix.

Few time ago, I heard about Nissan had a problem with their MAF (Mass Air Flow sensor), if when it is acting uo, disconnect the sensor, if run OK, then replace it.

The other possibility (that you comment us) is the Crankshaft Position sensor (CKP); this devices measures crankshaft location and relays this information to the PCM (Powertrain Control Module). Depending on the vehicle, the PCM uses this crankshaft position information to time the spark properly or on some systems it is only for misfire detection and does not control spark timing. The CKP sensor is stationary and works in harmony with a reluctor ring (or toothed ring) that is attached to the crankshaft. As this reluctor ring passes in front of the CKP sensor, the magnetic field created by the CKP sensor is interrupted and this creates a square wave voltage signal that the PCM interprets as crankshaft position. If the PCM detects that there are no crankshaft pulses or if it sees a problem with the pulses on the output circuit, P0335 will set, this is the reason because I suggtes scanned the PCM, to confirm this fault code stored there.

A P0335 "check engine light" code could be caused by:
* Damaged CKP sensor connector
* Damaged reluctor ring (missing teeth or not turning due to sheared-off keyway)
* Sensor output open
* Sensor output shorted to ground
* Sensor output shorted to voltage
* Failed crank sensor
* Broken timing belt
* Failed PCM

Note this possible solutions, if this wrong is present in your vehicle:
1. Using a scan tool, check if, when engine is running or cranking, that there is an RPM signal.
2. If there is no RPM reading, then visually inspect the crank sensor and connector for any damage and repair as necessary. If there is no visible damage, and you have access to a scope, you could check the CKP 5 Volt square wave pattern. If you do not, then, obtain a resistance reading of your crank sensor from a repair manual. (There are so many different types of crank sensors that there's no way to put here which resistance reading is correct). Then check the resistance of the CKP sensor by disconnecting the sensor and measuring resistance of the sensor. (It is best to check resistance readings from the PCM connector. This rules out any wiring problems from the start. But it does require some mechanical skill and shouldn't be performed if you\'re not familiar with automobile electrical systems). Is the sensor within resistance specs?
3. If not, replace the CKP sensor. If so, recheck resistance reading from the PCM connector. Is the reading still okay?
4. If not, repair open or short in the wiring to the crank sensor and re-check. If the reading is okay, the problem is intermittent or the PCM may be at fault. Try reconnecting and checking for RPM signal again. If there is now an RPM signal, wiggle test the wiring harness to try and induce the fault.

This code is basically identical to P0385. This code P0335 refers to Crankshaft Posistion Sensor "A", whereas P0385 refers to Crankshaft Position Sensor "B". Other crank sensor codes include P0016, P0017, P0018, P0019, P0335, P0336, P0337, P0338, P0339, P0385, P0386, P0387, P0388, and P0389.

Good luck and keep us updated.