Crank sensor problems

bsteward

I have a 2009 370z With the EXACT same issue... with one exception.. Its the passengers side Camshaft position sensor that we can leave unplugged or turn it and the car will start and run immediately. BUT its in limp mode.


any help would be appreciated.

BTW... we already replaced both of the cam position sensors AND the Crank position sensor with new Nissan parts with the SAME problem after replacing sensors. Even Removed the clutch and reinstalled looking for a Crank sensor / Flywheel pickup issue.. NONE found.


???

SouthArk370Z

Assuming the sensor is installed properly and "seeing" the crank target, then it's either wiring or the ECM. You may be able to tap into the ECM, via CAN, and see if it is getting the signal.

__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

Spooler

If I had to guess it would be a broken wire in the engine wiring harness. Why you ask? Because I have fixed several Nissan vehicles with this problem that would cause chronic codes to pop up. Good luck finding someone with the skill set to fix it.

juld0zer

You can get pretty cheap basic oscilloscopes these days that would help in this situation. Assuming everything electrically checks out you're left with a faulty ECU or mechanical fault, such as the reluctor device becoming loose or stretched timing chains

slammedsammy

Has anyone solved this issue on their Z? My car is experiencing the same thing. Any insight would be helpful...I have replaced both the cam and crank sensors. Uhg... HELP!

__________________
"It's nice to be important...but it's more important to be nice."

faplifesmitty

I recently had a similar issue. My car only started with the cam sensor unplugged and drove around fine in limp mode. The dealership closest to me has repeatedly screwed me over, so I decided to repair the car myself.

The issue was that my timing was off quite a bit (-30* bank 1, -22* Bank 2). I had to use a snazzy Snap-On diag computer and some time. After a quick search, I discovered that my cam phasers were seized. I changed the cam phasers and set the timing back to spec (10hr job and those fu#^ers are expensive new). The service manual is also a huge help. Now the car starts right up, as it should. I hope this helps.

slammedsammy

Awesome (I mean, not awesome), but glad someone found a cure for their Z. Thanks for this quick write-up. I'll check into that after work. Appreciate ya mate!

__________________
"It's nice to be important...but it's more important to be nice."

faplifesmitty

No problem, dude.