Fumes entering cab (sometimes)

Elmo370z · 01-12-2015, 11:37 AM

I know they are threads on here about changing the fluids, I need to know the amounts of each, I haven't been able to find that.

Brake fluid: I'm going with redline.

Tranmission: Going with motul

Differential: Motul

Power steering: redline D6 ATF automatic transmission fluid????

ktmmike · 01-12-2015, 11:49 AM

Quote:

Originally Posted by rajmangal7

I have a 2014 sport and experience this as well. I thought it was just normal until my girlfriend smelled it too

-Raj

Thanx Raj,

Do you smell it ONLY when the heater is on? on outside air? recirc? both?

Do you smell it ONLY under hard acceleration?

Sometimes mine smells a little too strong to be considered normal I think.

ktmmike · 01-12-2015, 11:53 AM

Quote:

Originally Posted by Elmo370z

I know they are threads on here about changing the fluids, I need to know the amounts of each, I haven't been able to find that.

Brake fluid: I'm going with redline.

Tranmission: Going with motul

Differential: Motul

Power steering: redline D6 ATF automatic transmission fluid????

This thread is about fumes, Elmo
Not sure where the fluids thread is.

SouthArk370Z · 01-12-2015, 12:09 PM

Quote:

Originally Posted by ktmmike

Overloading the cat(alitic converters)? with what? oil or oil fumes?

And how did you correct it?

Products of incomplete combustion. The engine is putting out more PICs than the catalytic convertors can handle.

I learned to live with it.

A tune might help but I doubt it would eliminate the problem. "Better" cats might help but that sounds restrictive and expensive.

Dragon_Ball_Z · 01-12-2015, 01:29 PM

Quote:

Originally Posted by ktmmike

Thanx Raj,

Do you smell it ONLY when the heater is on? on outside air? recirc? both?

Do you smell it ONLY under hard acceleration?

Sometimes mine smells a little too strong to be considered normal I think.

I smell it a lot when I start the car. When I am normal driving at times and always under moderate acceleration, like I rarely bust redline, just normally to 5k. I was spirited driving the other day for about two minutes and it was pretty bad when I came to a stop. I am not sure about the ac thing. I normally leave mine off all the time, literally all the time. It is a really strong gas smell.

-Raj

ktmmike · 01-12-2015, 01:33 PM

Quote:

Originally Posted by SouthArk370Z

Products of incomplete combustion. The engine is putting out more PICs than the catalytic convertors can handle.

I learned to live with it.

A tune might help but I doubt it would eliminate the problem. "Better" cats might help but that sounds restrictive and expensive.

Thanx Southark,
But that would exit the tailpipes, correct? How would that get into the heating ducts?

I do have past experience with exhaust fumes entering the cab of a different car. These are NOT exhaust fumes.
They do not smell like exhaust fumes. They don't affect your eyes or throat like exhaust fumes do.
(But they ARE annoying to have in a NEW car that surely doesn't need a tune up yet)

Hopefully I will get a chance to check it on recirc later this week.

*

ktmmike · 01-12-2015, 01:41 PM

Quote:

Originally Posted by rajmangal7

I smell it a lot when I start the car. When I am normal driving at times and always under moderate acceleration, like I rarely bust redline, just normally to 5k. I was spirited driving the other day for about two minutes and it was pretty bad when I came to a stop. I am not sure about the ac thing. I normally leave mine off all the time, literally all the time. It is a really strong gas smell.

-Raj

Thanx Raj,
Mine does NOT smell at all like GASOLINE, and never when I start the car.

I think we have two different problems. I'd be more worried about yours!

*

Dragon_Ball_Z · 01-12-2015, 02:23 PM

Quote:

Originally Posted by ktmmike

Thanx Raj,

Mine does NOT smell at all like GASOLINE, and never when I start the car.

I think we have two different problems. I'd be more worried about yours!

*

Are you stock?

-Raj

ktmmike · 01-12-2015, 02:55 PM

Quote:

Originally Posted by rajmangal7

Are you stock?

-Raj

Totally

*

SouthArk370Z · 01-12-2015, 02:58 PM

Quote:

Originally Posted by ktmmike

Thanx Southark,
But that would exit the tailpipes, correct? How would that get into the heating ducts? ...

Going by your descriptions, my money is still on the exhaust. But it's difficult to diagnose smells over the Intertubes.

ktmmike · 01-12-2015, 03:14 PM

Quote:

Originally Posted by SouthArk370Z

Going by your descriptions, my money is still on the exhaust. But it's difficult to diagnose smells over the Intertubes.

Very difficult.
Thank you for your help.

glw · 01-12-2015, 07:41 PM

Quote:

Originally Posted by ktmmike

Yes, glw, it could be a burnt oil smell . . .
and yes, now that you mention it, the smell seems to be at its worst:

1. after hard acceleration UP steep twisty mountain roads (which is mostly what roads we have around here). AND

2. also at its worst at relatively higher rpm in lower gears while running back down the steep twisty mountain roads.

I can cruise down the Interstate at 80 mph for hours and not smell it at all.

I, too, have the burnt oil smell post hard acceleration (with recirculate on?). It seems fairly common on newer cars (non-Nissan, too).

My guess is that the EGR PCV valve is passing too much oil to the intake on hard acceleration and we're smelling the resultant burn. I was looking for a place to mount one an oil catch can to see if it helps, but there's no room in the stock engine bay.

Dragon_Ball_Z · 01-12-2015, 07:53 PM

Quote:

Originally Posted by ktmmike

Totally

*

I have berk hfc's and it is probably because of more airflow. Less restrictions. With stock cats I didn't have that problem really.

-Raj

SouthArk370Z · 01-12-2015, 09:21 PM

Quote:

Originally Posted by glw

... My guess is that the EGR valve is passing too much oil to the intake on hard acceleration and we're smelling the resultant burn. ...

I had always assumed it was over-fueling but EGR/oil makes sense, too. Wouldn't take much to make a big smell.

ktmmike · 01-13-2015, 07:42 AM

Quote:

Originally Posted by glw

I, too, have the burnt oil smell post hard acceleration (with recirculate on?). It seems fairly common on newer cars (non-Nissan, too).

My guess is that the EGR valve is passing too much oil to the intake on hard acceleration and we're smelling the resultant burn. I was looking for a place to mount one to see if it helps, but there's no room in the stock engine bay.

Thank you glw!
BEST THEORY so far because it would explain the right type of smell.

I don't understand your last sentence though.
If the Z comes with an Exhaust Gas Recirculation valve, how can there NOT be room for it? Are you referring to a larger aftermarket EGR possibly?

*

01-12-2015, 11:37 AM	#16 (permalink)
Elmo370z A True Z Fanatic Join Date: Apr 2013 Location: st. petersburg Posts: 5,709 Drives: 09 nissan 370z Sp M6 Rep Power: 295378	fluid change I know they are threads on here about changing the fluids, I need to know the amounts of each, I haven't been able to find that. Brake fluid: I'm going with redline. Tranmission: Going with motul Differential: Motul Power steering: redline D6 ATF automatic transmission fluid????

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