[DKrajacic]

I have a 2003 Nissan 350z with an 05 engine. Lately after driving for about 20 minutes or even at idle it will cut off and not re-crank for at least 30 minutes once it has cooled. I ran diagnostics and came back with cam sensor 1/2 and knock sensor. I have changed can sensor 1 and 2, crank sensor, fuel pump, and throttle body. I am stumped any suggestions on what else it could be. I know it is throwing a knock sensor code but not thinking this has anything to do with it. Any suggestions would be greatly appreciated.

 

[dkmura]

Welcome- the first thing I'd ask is where did you buy the cam and crank sensors from? Aftermarket ones have been known to fail, so the OEM parts have been more reliable.

 

[DKrajacic]

Unfortunately I purchased them off Amazon.

 

[dkmura]

Try some OEM units purchased from the dealer or other online Nissan sales as a first step.

 

[DKrajacic]

Even if the new parts are not throwing any codes?

 

[dkmura]

Even if the new parts are not throwing any codes?

Ah, you didn't mention that in your original post. Your problem certainly sounded like the symptoms of a failing cam sensor. What codes are showing up currently?

 

[DKrajacic]

Only the knock sensor or currently showing a code

 

[dkmura]

What code # is showing? What kind of tool are you using?

 

[DKrajacic]

Ok so we changed the knock sensor and wiring harness. There are no check engine codes and it still will only run at idle for about 20-30 minutes before it engine stalls and will not re-crank until car has sat for about 15 or so minutes. I am at a loss of what it can be. Any suggestions or where to look next

 

[dkmura]

Repeating: what kind of scan tool are you using? Some scan tools will not pull all the codes in memory. Hard to believe that there are NO codes being shown after the car stalls. Can't help you if you don't answer these clarifying questions...

 

[DKrajacic]

ZR15S OBD2 Code Reader

 

[DKrajacic]

Zurich

 

[dkmura]

A generic code reader like the Zurich ZR15 may not read all the Nissan codes coming off the ECM. It could be that you need a second opinion from a pro shop with a specialized Nissan program like UpRev's Cipher.

 

[DKrajacic]

Ok thank you for the additional information. I will definitely look into taking it in.

 

[Balthazar9000]

The first thing I thought of when you described the symptoms is a dirty fuel filter. I don't know the particulars of the fuel filters in a 350z but basically what can happen is that while its running the filter slowly accumulates with dirt blocking fuel flow, then when you turn the engine off and the pump is no longer sucking dirt and fuel into the filter the dirt falls away then you can start it again.