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Archive for September, 2016

Hello internets.  Been a while since I posted, but wanted to share a repair I just made to my car.  I’ve been researching for months why my G stalls out when babying the gas in stop-and-go traffic, or reverse, or pulling into the driveway.  I have about 88,000 miles and it drives great when the rpms are above 1000.  When they hit 1000, the engine seems like it’s choking and many times will stall out.  This has been happening for a very long while now and I’ve searched and searched for a definitive answer to no avail, until last week I stumbled upon something.  The forums for infinity owners are outstanding and based on lots of reading, there are several things that could cause stalling.

  1. Mass Airflow Sensors – either bad or dirty.  I cleaned mine with MAF cleaner spray multiple times which didn’t help.
  2. Camshaft sensors
  3. Crankshaft sensors
  4. After market air filters – which ultimately lead to #1
  5. Dirty throttle body

Normally if there’s a problem you will get a service engine light, which you can take to any local auto parts story and have them provide a printout of the reading.  Typical codes mentioned related to this problem are P0024, P0014, P0133 (maybe).  I was not receiving any SES, which made this that much more baffling.

To make a long story short, it turns out that PCV valves can choke an engine when they go bad.  See the article below for an explanation of what they do/how they work.

I bought a $6 replacement value from Amazon…this one specifically: https://www.amazon.com/gp/product/B001UEBXD8/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

Once the old one was out and the new one in, there was no more stalling/hesitation/choking.  Like magic!

What a PCV does:  http://www.agcoauto.com/content/news/p2_articleid/197

To replace the PCV you need to take off the passenger side intake body.  The valve is located directly underneath (labelled on the engine).

Good luck!

*Update 12/23/16 – after a couple weeks of running fine, it started hesitating and stalling again.  Decided to take it to local Nissan dealer who diagnosed an out-of-date software version in the ECU.  They updated the software and replaced the spark plugs.  It hasn’t died since (about 3 weeks ago), but it has again started to hesitate coming off the line.  The dealer also recommended a full fuel system cleaning ($100+) which I passed on.  If things get any worse, that will be my next course of action.  *sigh*

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