smoothslide1

Hello everyone so it kinda sucks that my first post on here is about a huge problem I'm having with my G37 not starting up. I have a 2010 G37x coupe with 33k miles which long story got a motor swap due to the old motor smoking and I for the life of me can't get it started. I need all the help i can get and as a incentive to help if your suggestion is right i will pay you via paypal !!!. Thats how bad i need the help. Car has been out of use for almost 3 weeks now and its my only source of transportation so i absolutely need it. I will list things that I'm sure of or know about.

Problem:
Car cranks over but won't start.The odd part is if you sit there trying to crank it over every 4 cranks or so it will turn over and start but it stalls immediately after 7-8 seconds. It always feels like it wants to crank over and is right there but just can't or wont.

Tests Performed:
-Did a compression tests and came out with over 200 psi in all 6 cylinders.
-Fuel pump primes when you hit the start switch before turning it on, also took fuel rails off and made sure car was getting fuel and defiantly saw fuel coming out.
-I'm fairly sure its getting spark.
-No blown fuse in fuse boxes by battery checked all the fuses their and no blown fuses.
-checked all plugs after swap and all were plugged and grounds seem nice and tight.
-Have ran it for codes several times and looked in various places and no codes come up whatsoever.
-Previous battery was dead due to swap taking over 1-2 weeks so we swapped it with a new battery and same results.
-Swapped out throttle bodies and intake manifold, same problem.
-Did throttle relearn, still same results.

Any and all suggestions would help greatly.

Jukeboxhero

iTrader: (3)

Seems like you have tried a number of things. If you are getting fuel and air, then maybe it is spark.

Have you actually tried swapping in new plugs / checking conduction in the coil packs / lubing the plug ends with dielectric grease? You said there is eventual turn over, but it quickly dies. Maybe one or more plugs are defective or damaged?

Perhaps you have something unplugged in the bay? Maybe one of the connections to the coils was damaged?

Good luck man.

cecrops

iTrader: (4)

Need more info. What car exactly was the donor motor in? What transmission do you have and what transmission was in the donor car? Did you replace the ECU or any wire harnesses?

G37Sam

Pull your sparks out, try cranking the car and see if you get a spark on all 6 plugs.

miketyler

Did all sensors and wiring match up in the swap? From your description, it seems like you may be getting spark in the start position on the switch but not in the run position.

I will send this over to my Infiniti guy who is a service mgr here in Dallas at Sewell. Interested to see what he thinks might be the issue.

miketyler

OK, from my buddy:

He would be better off towing it to a dealer and let them spend 30 minutes to tell him what is wrong. I have seen guys put flywheels and flexplates back on wrong which is possible and will mistime a motor. Plugging in cam sensors wrong is also possible and will cause weird things to happen.

Is he trying to say every 4 attempts the car will start and run for 7-8 seconds? With the pushbutton start once he hits the button it should crank and continue cranking until it starts. It will crank for at least 10 seconds or until he takes his foot off the brake. Is it an auto or stickshift?

smoothslide1

Thanks man unfortunately the luck helped a little bit until i drove it out of the mechanic shop and only after a few miles to hear the car making a whistling or whining noise and feel very sluggish to accelerate, and upon turning around to get to the mechanic shop, soon as i made it back in the mechanic shops lot it died again. I'm so done with this car but while were at it I need a new motor for sure. This ones just been problematic to start with.

Thank you for the suggestion it was the cam gears.

Thanks again the problem was with the cam gears.


Honestly infiniti so far has gotten me absolutely no where.

smoothslide1

Does anyone know where I could get a used motor in decent condition for cheap?..

telcoman

Wow!

It seems very strange to me that an Infiniti with only 33k miles would need an engine swap.
Was this a salvage or flooded vehicle?
Who made the diagnosis that the engine needed to be replaced?
Was the previous engine run without oil?
What was the root cause of the smoke?
Why wasn't the original engine just rebuilt?

Good luck

Telcoman

Paratrooper

iTrader: (3)

^^This! We need answers!

RPG11

Try Ebay