08 G37s Cranks, Won't Start
 

Hey fellas, was looking for some help. I recently ran into a completely out of the blue problem.

My 2008 g37S coupe (66,000km) was sitting for about 3 days and when i came to start it up in the morning it would turn over, but wouldn't start. It was driving perfect before, never had an issue.

I've changed the battery, was probably not needed but did anyways. Checked every single fuse, fuel pump is priming, haven't pulled a plug yet to check for fuel and spark but from what I've been reading it's not that.

I ran a OBD 2 scanner and got no codes. The I/M readiness test indicated O2 Sensor Monitor, Catalyst Monitor, and Evaporative System Monitors as not ready that's all.

It's looking like I will be sending it (towed) to Infiniti, but I wanted to brainstorm some possible problems and have any idea at least before I give it to them. Reason being I don't trust dealers at all.

Anyways, any ideas would be most appreciated. I'll update this thread if I find anything out and when it's fixed in case anyone else has the issue.

Thanks!

your car is cranking so your battery and starter should be ok.. id go ahead and check fuel and spark...
if those checks out.. check compression

Okay, another dilemma. Checked spark and fuel both were good, and it started...

So I still don't know what was the issue, and now have a car, that runs, but I don't trust because I never resolved the issue...

Folks with this issue on the 370Z site indicated possible fuel pump issues. Apparently sometimes the seals stick when they are wearing out. Might also check for corrosion on the electrical connections

I had a similar problem with my '08. It wouldn't start and since I couldn't find any issues with it, I changed the spark plugs. When I pulled out #3, I found that the porcelain had cracked on the plug. Replaced all 6 plugs and have not had a starting problem since. I may have accidently fixed something by removing the coils, but the only thing that I noticed that was bad was the plug.

Was that the only issue?