*** BOGGING *** WTF, 2008 G37 Coupe 2000k Bogging

[motobman]

I drove to work today and was about 45 degrees and the engine was up to temperature. I pulled out on a side street and it totally bogged. Other than the driver coming, flashing his lights, I didn't think much of it.

On the way home, filled up with gas, 91 reputable station (Shell) and turning onto my SAME STREET, it bogged again!!!!!

Not sure what to do, has anyone had this happen????

Moto

[SteveTheTech]

Interesting....

Does this happen only on the same street? and then clear up? I would suspect some kind of environmental catalyst . I don't know what exactly but is your slip light coming on?

[motobman]

More Info:It just happened to be turning onto the same street..and just a coincidence. I was, however, starting out from a dead stop and pretty much floored it, or gave it alot of gas from standing still. I tried disconnecting the battery last night and depressing the brakes a few times... Everyone has said in the past to try resetting the ECU.I have not yet taken it out, but will try today when I go wash it.

Thanks for the words and Ill update again after I drive it.

Im getting the oil changed next Friday for its first.

Moto

[SteveTheTech]

Performing this reset procedure on newer cars does nothing beneficial except potentially alter the short term parameter RAM settings. The closed throttle and Idle Volume Leaning, and well as transmission adaptive memory will most likely not be effected as the writing procedure is now different. That will do nothing but confuse your car and potentially cause driveability concerns.Keep in mind the increased number or sensors and advanced detection logic have changed to the point where the car knows whether it senses something out of spec or you have done something to displease it and it can adapt accordingly.

You are loosing traction on that street either take a different road or don't play Paul Walker on streets with compromised traction.

[motobman]

It makes sense what you are saying but these streets are totally dry and I'm taking off from a dead stop. The traction control light does not come on AND the tires are not spinning, the engine almost dies and bogs off the line.

I'll keep an eye on it and like I said, it's going in Friday for the first oil change.

Thank you,

Moto

[G_whizz]

Easiest solution to eliminate first...your VDC is off right??

[Jacko3]

motobman:

That is normal---your car is okay. The car is still new. Don't flog it anymore until it has broken in properly----some Gs do that because they are still relatively new and yet their owners decide to flog it. I had the same issue with my first engine when I first bought my 2007 G-35 coupe---I was given a new engine becasue of oil consumption issues. So, give it time and that bogging down may actually disappear. You can still rev it up to 5000RPM, but demanding 7,000RPM at this point with that symptom, may not be a good idea. Only a few Gs do this. Drive it normally some more and then try to flog it again. Pay attention to your oil level during this period to ensure that engine vacuum isn't sucking it out.

[motobman]

Ok, thanks guys. G_Whizz, the VDC was on (stock) I didn't turn anything on or off, just warmed it up and went to work.

The revs were not up at all and I don't know how much it went up but not much.

I'll keep an eye on it and after I get the oil changed next week, pay close attention.

Thanks!!!

Moto

[pfarmer]

I drove to work today and was about 45 degrees and the engine was up to temperature. I pulled out on a side street and it totally bogged. Other than the driver coming, flashing his lights, I didn't think much of it.

On the way home, filled up with gas, 91 reputable station (Shell) and turning onto my SAME STREET, it bogged again!!!!!

Not sure what to do, has anyone had this happen????

Moto

Same gas station as the last time? Could you have a gas filter problem? I had something similar to this occur on an 87 Honda I owned. Took awhile to find the filter which was behind a panel covered with mud near the tank. Took it out, replaced it and all was good. Turned out to be full of what looked like some milky solution.

I would definately not call this normal, however at the same time there may be a simple fix to it. Personally i would take it in as early as possible to make sure it is not telling you about something more serious occurring.

On my wife's previous car, a Sebring, when new it did something similar only the engine light would come on. Turned out the person of most help was a girl at the other end of the phone who stated to carefully check the gas cap for proper sealing. Not sure why but it was in fact not sealing properly and after that was taken care of, the issue disappeared.

If it occurs again pay attention to the rpm as that may be an excellent clue as to cause, although it seems to me it should give you some indication and not simply disappear.

Perry

[4drsleeper]

I don't think there's a problem at all. Everytime I turn a sharp corner and try to floor it the car bogs down. The car is removing all the power so that you don't spin the tires and end up going sideways. Try the exact same thing again but this time turn off the VDC and see what happens.

The first time I turned a sharp corner and the car bogged down it freaked me out and then I thought about it. It's just the VDC doing its job.

[joe603]

You can see the VDC working (if you're brave enough to look down) during "spirited driving".

[pfarmer]

I don't think there's a problem at all. Everytime I turn a sharp corner and try to floor it the car bogs down. The car is removing all the power so that you don't spin the tires and end up going sideways. Try the exact same thing again but this time turn off the VDC and see what happens.

The first time I turned a sharp corner and the car bogged down it freaked me out and then I thought about it. It's just the VDC doing its job.

I guess it comes to the definition of 'bog'. I also have an 08 but with AWD. I have done the same thing on entering a street but I would not state that it bogged down in the sense of being held back noticeably. Also this was usually but not always on pavement that was wet. Basically as soon as wheel slip occurred the AWD kicked in and acceleration maintained. The dash indication also shows up. I have never had it where it felt like the engine rpm simply fell and power lost which sounds like what is occuring in the discription by the original poster. To me it sounds like the inability to maintain load

Perry

[4drsleeper]

I'll try to explain exactly what I encountered.

If I am making a 90deg turn and I floor it just as I come around the corner the car will instantly feel like it died. In fact, the nose of the car actually dips due to the instant loss of power. This "bogging" feeling lasts for about 1 second and then the car shoots forward with all it's power but the wheels never spin. Now, if I tried the same thing with the VDC turned off I would end up sliding around the corner with wheels spinning.

I'm not sure this is exactly what the MOTOBMAN is experiencing or not.

[motobman]

I think this is exactly what you are saying (4drsleeper). I have a feeling I know what will happen, if I try the same turn, same gas pedal, and VDC off..... I think it will light up the tires....

The RPM's are starting at about 1500, its not like Im reving the engine and taking off, or flooring it after I have taken off.... This is simply turning onto a street and giving it gas and it, seeming, like its cutting out.

You all are probably right, I may just be paranoid and there may be nothing wrong...

Ill check out the VDC as soon as I can.

THanks a million,

OH and I love the car !!!

[Sentientbydesign]

VDC works by cutting power AND applying independent braking when the electronics sense loss of traction. Keep in mind that the G37 has a lot of power and torque, so breaking traction might be easier than you think.

As far as breaking in the engine and not pushing it...that's really up for debate. I've read quite a few sources that indicate just the opposite for good piston ring seating.

Jacko's comment about all new Gs experiencing power issues is far from the truth and should be disregarded. Driving a G requires getting acustomed to it and understanding how and why it does what it does.

[pfarmer]

As far as breaking in the engine and not pushing it...that's really up for debate. I've read quite a few sources that indicate just the opposite for good piston ring seating.

Jacko's comment about all new Gs experiencing power issues is far from the truth and should be disregarded. Driving a G requires getting acustomed to it and understanding how and why it does what it does.

I believe it comes down to what 'pushing it' means. Also as far as piston ring seating, unlike older cars this probably occurred for all practical purposes before you took possession of the car. I don't think you need to baby it all that much, however running up to red line when brand spanking new is probably not a good idea on a daily basis either.

Another thing often missed when owners think about warmup and so on in a new car is the rest of the drive train.

Perry