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-   240Z, 260Z, 280Z Performance / Technical (https://www.zdriver.com/forums/240z-260z-280z-performance-technical-124/)
-   -   Exhaust smell (https://www.zdriver.com/forums/240z-260z-280z-performance-technical-124/exhaust-smell-24840/)

z_lis Jan 26, 2008 06:44 PM

ya know, I'm not so sure what I'm smelling anymore... I just know it's really strong when the windows are down. and now that the dumb tail pipe is turned, I smell that more when I'm sitting at a stop light. It is so frustrating, I just hope it's these hoses now. we'll see, if it's not I think I will sell it.

z_lis Jan 26, 2008 07:58 PM

do you think a fuel smell will give headaches?

tonsoffun300zx Jan 26, 2008 08:02 PM

to tell you the truth i love that smell when i drove my z the scent of exhaust fumes made me kinda feel good

snwbrderphat540 Jan 26, 2008 09:24 PM

yes it will. it will badly.

theramz Jan 26, 2008 09:52 PM

The canister filtersfumes from the gas tank. If the gas hoses are leaking it doesn't take much to stink up the whole car. So all the fuel hoses and vacuum hoses should be replaced. The exhaust fumes are the hardest to get rid of so hatch seals are likely bad to. lifegrddude is right about the muffler. If it's a clamp-on have it welded.

Niku-Sama Jan 27, 2008 02:01 AM


Originally Posted by willkrom1990
i have some fuel smell too. and the injectors are a tad wet...

a tad wet eh?
my number 3 or 4 injector usually has a small pool of fuel under it after i drive it a while, i pulled the plug though it doesent run to lean.

i am afraid its going to go up in flames though but i cant find any decent sets of injectors

z_lis Jan 27, 2008 11:09 AM

What a dirty car I have... kinda embarassing....

z_lis Jan 27, 2008 11:09 AM

Yeah, it reallly can cause a car fire, you should fix it.

theramz Jan 27, 2008 11:31 AM


Originally Posted by z_lis
ya know, I'm not so sure what I'm smelling anymore... I just know it's really strong when the windows are down. and now that the dumb tail pipe is turned, I smell that more when I'm sitting at a stop light. It is so frustrating, I just hope it's these hoses now. we'll see, if it's not I think I will sell it.

I found a lot of small holes when I pulled up the rear carpet, missing body plugs, pin holes. The biggest leaks were around the hatch and tailights. The rear valance is factory spot welded to the floor. There is a rubber seal in there which you can't get to. The valance actually scoops fumes up into the interior. I am going to reseal the whole thing when I finish the body work. Maybe a spray on type sealer like bed liner.

z_lis Jan 27, 2008 01:23 PM

I'm going to pull up my carpet.

z_lis Jan 27, 2008 01:43 PM

How can I get a picture of my exhauste? should I crawl under? what part do you need to see?

snwbrderphat540 Jan 27, 2008 06:11 PM

lol, yeah get dirty :D idk, just the manifold area and the first half (by the tranny) cause any part of it after that wont cause to bad of a smell. but i have a feeling it was what ever is leaking gas.

theramz Jan 27, 2008 09:44 PM


Originally Posted by z_lis
How can I get a picture of my exhauste? should I crawl under? what part do you need to see?

I don't think you need to start tearing apart your car just yet. First find out if it's gas or exhaust you smell. Inspect it bumper to bumper bottom to top while it's running and eliminate every possibility. If you want to crawl around under it please wait till I get there to watch!

z-hag Jan 27, 2008 09:52 PM

gee, lis....i thought that got fixed already......wow....persistent stinky.....

ramZ....how old ARE you?????? i'll bet i am older than you are........

myxtaz Jan 27, 2008 10:51 PM


Originally Posted by lifegrddude
It's the aerodynamics of the Z that draw the fumes in the cabin. You can't completely get rid of the smell, but if you extend your muffler tip past the rear bumper by a few inches, it drastically reduces the amount of fumes since the exhaust will enter the turbulent stream of air coming off the rear of the Z. That and make sure all your seals are in good shape. We did this on my friend's 71 240 and now we don't smell like we doused ourselves in gasoline every time we ride in his Z.

:048: Zlis, the above post has a lot of merit. Extending the exhaust beyond the bumper a couple of inches stright back will help greatly. Another thing to try. Take a strip of paper about 1'' wide and 4 or 5inches long. Put it across the gasket for the rear hatch, close the hatch and see if you can slide the paper. Do this especially all along the bottom and sides of the hatch. If there is a gap in the seal the paper will slip easily. There is a leak. Also look to the bottom of the rear fenders where the vent hoses exit on the passenger side, also where the antenna drain exits the fender. Seal around these openings. Check the rubber plugs in the rear hatch. There are hinge seals on the hatch that will allow moisture and fumes into the cabin, they aren't as much a cause as the hatch seal and tail light gaskets are. Which you have replaced. There are vent lines from the gas tank that enter the cabin in the rear behind the plastic trim. Be sure that they are sealed around the hoses. Silicone sealer works well . Good luck. Gary aka beandip

z_lis Jan 28, 2008 10:06 AM

I have extended the tail pipe, I have done the paper test, I have done the gaskets around the lights.... I have not lifted my carpet yet. I'm going to do that tonight, and am going to take more pictures of my exhaust. I will check the vent lines from the gas tank... *sigh*


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