i have experienced hesitation that felt more like the car hunting between gears. perhaps i need to pay more attention to it and the problem isn't the ECM getting confused. keep us posted, please.

 

Ok dropped the car off today at the dealer. He said that Infiniti was bringing in a tech from Tennessee to do the work and show the inhouse mechanics how to do it. He described a problem that there are gears or clutches on the exhaust side that are too small as well as the cover that is too big. Said that this creates too much volme in this area and doesn't allow the correct amount of pressure to build up. Said that this tech has replaced about 20 already and has the procedure down to 6 hours versus about 2 days of work if you haven't done it before. He did say that the tech says it creates problems when the engine is warm also. No info beyond that.

That to me says design problem.

 

so it's related to the variable timing control, then. i think that feature is "charged" by oil pressure.

do you know if there's going to be a TSB on this, or are they just going to treat cars that demonstrate symptoms?

 

Hey all,

I just picked my 07 g35 6mt on sat and I have this problem. It stuck out quite prominently as i had an 06 6mt which was written off this month which never exhibited anything like this. Low rpm, bump the throttle some and the car hic-ups. Just wanted to post as Im not sure if i was the only one with a 6 speed doing this. Will probablly be popping by infiniti to discuss the cam gear replacement.

 

This is probably a different issue that some of us with 6MTs have been experiencing. See the thread related to hesitation.
https://g35driver.com/forums/g35-sedan-v36-2007-08/165035-normal-hesitation-not-related-gas-pedal-lack-responsiveness.html

 

does this TSB have anything to do with this problem? it's dated 11/8/06.

 

that definitely sounds like it, but that's not a full TSB, just an advisement.

but technically, it sounds like the exact issue.

 

Warm it up

 

Mines at the dealer now... They kept the car all yesterday and said they could not reproduce the problem. Odd, since I can reproduce it every day coming home from work....

Start car, drive down street 1 mile to light in heavy traffic at 25-35 mph, stop and then slowly pull off in heavy traffic and it starts bucking until RPM gets up over about 3K. Next light is about 3 miles and by then it's warmed up and does not do it again until car sits for 2-3 hours. The hotter it is outside the worse it seems to be. In the mornings when I go into work and it's cool (65-70F) it usually does not buck like this or if it does it's much less noticable. But crank it in the middle of the day when it's 95-100F after letting it sit for a few hours and it will buck badly, actually throwing your head back and forth when you try and pull off slowly from a stop after driving about a mile.

The '07 loaner they game me does not have this problem.

Anyway, they kept the car over night. Said they want to run some more tests. Said they had adjusted the throttle body linkage? I'm going by to pick it up at noon. Will see if they fixed it then. Will post an update this afternoon.

 

I am picking mine up tomorrow after the repair. I will find out details to what it is, etc. Keep you posted.

 

Just got the car back. It's not fixed.

 

Ok got the car back. Apparently, they had to remove and replace several components having to do with the VDC system. I think they gears/clutches were replaced as well as the cover itself. The tech showed me that what they replaced. The two covers took up the entire front of the motor. They essentially had to pull apart the front of the motor as well as remove many compenents located in the from of the engine compartment.

The tech was from TN. He has done about 20 of these. He can do one per day, but a typical tech will take tow days at first. He said approx 2500 early production cars will be affective although no recall has been issued.

I am getting the full paperwork in a few hours and will report back with what it describes in detail.

 

Well, mines not fixed. Was bucking this afternoon when I got off work. It had not cooled down enough I drove it yesterday for the problem to show up. Bogeydog, I would appreciate any info you could post. I got my G the 1st week they hit the lot so mines a early production car.

I could see where some people might not notice it. You have to drive about a mile then come to a stop and slowly pull off. If you drive more than about a mile then by the time you stop it's warmed up enough not to do it, and you have to let the car sit 2-3 hours before it will do it again.

 

This is taken directly from service ticket:

...We performed consult and spoke with Mr. Charlei Seymour, the Tech Svc Mgr, came fro TN, to assist is in the installation of these countermeasures. He ordered updated exhaust camshaft VTC parts. We removed the front timing cover, VTC covers, valve covers, intake manifold. We installed the updated parts and re-asembled the engine. All removed parts were sent back to Infiniti for further inspection.

Parts
Gasket silicone liquid-999MP-A7007P
Gasket - Rocker cover - A3270-JK20A
Gasket - Rocker cover - A3270-JK20B
Sela -Oil, Crankshaft - 13510-21U10
Gasket - Adapter - 140320-JK20A
Gasket - Adapter - 16175-JK20A
Seal-O-Ring-21049-AE000
Long Life Antifreeze-999MP-AF000P
FLTR ASY-OIL-15208-65F00
Washer-Drain_11026-01M01
Mobil 1 Synthetic Oil
VOR-CSC Handling

Hope this helps.

Problems seems resolved.

 

yeah so it's definitely a valve timing problem.

please monitor your mileage for us... there's a small chance it might get better, but being on the exhaust side and given the problem descriptions so far, it's not hugely likely.