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Strong gas smell when starting

Tried searching, but does anyone know if itís normal for our Zís to have a strong gas smell when starting after the car has been sitting for a couple of

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Old 10-07-2017, 03:08 PM   #1 (permalink)
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Default Strong gas smell when starting

Tried searching, but does anyone know if itís normal for our Zís to have a strong gas smell when starting after the car has been sitting for a couple of hours?
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Old 10-07-2017, 03:39 PM   #2 (permalink)
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does anyone know if itís normal for our Zís to have a strong gas smell when starting after the car has been sitting for a couple of hours?
Absolutely not!
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Old 10-07-2017, 04:07 PM   #3 (permalink)
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Any mods?
HFC and test pipes can make a difference. Cats burn off any raw fuel that gets thru to the exhaust. Once they heat up, that is. Take them out of the system with test pipes, or reduce their effectiveness with High Flow versions, and a gas smell can be more apparent.

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Old 10-07-2017, 06:47 PM   #4 (permalink)
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weird...you need to make sure that the fuel hose didnt come of the pump housing, by removing the small resting panel behind pass seat, after that remove the cushion, there you will find the access to the gas tanks fuel pump, check the fuel hose connection, make sure its all the way in and if there are fuel traces around, if its all the way in and no fuel traces, you need to follow the smell or fuel line to find the leak.

MAKE SURE THAT YOU DO THIS IN A WELL VENTILATED AREA!!!!
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Old 10-07-2017, 10:27 PM   #5 (permalink)
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Engine Breather pipe/joints...check for cracks or broken joints.
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Old 10-08-2017, 02:11 AM   #6 (permalink)
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No mods, been smelling it for a while now. First thing i checked was fuel pump since it was changed out a few months back and all is well there. Thought maybe leaky fuel injectors, but wouldnt that cause the car to be hard to start? Doesnt have an issue starting, just really strong fuel odor for about the first minute after starting the car.
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Old 10-08-2017, 04:32 AM   #7 (permalink)
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One thing popped in my head when I read about fuel pump install;
Another member used screws that were too long & caused a problem.
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Old 10-08-2017, 05:20 AM   #8 (permalink)
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One thing popped in my head when I read about fuel pump install;
Another member used screws that were too long & caused a problem.
Yeah, happen to someone else. Removed the bolts and put some RTV on the bolt threads.
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Old 10-08-2017, 06:58 AM   #9 (permalink)
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With the aid of a helper or two, you should be able to locate where the smell is coming from. If smell is coming from exhaust, probably an injector.

If the location can't be determined using noses, you can rent an explosimeter.
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Old 10-08-2017, 07:46 AM   #10 (permalink)
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Originally Posted by SouthArk370Z View Post
With the aid of a helper or two, you should be able to locate where the smell is coming from. If smell is coming from exhaust, probably an injector.

If the location can't be determined using noses, you can rent an explosimeter.
Used to use them at work. They have to be set-up for the type of gas you are checking for. And for % of LEL.
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Old 10-08-2017, 09:02 AM   #11 (permalink)
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Used to use them at work. They have to be set-up for the type of gas you are checking for. And for % of LEL.
Very true, but ... OP is not wanting to know an accurate level; he/she just wants to know where the gas smell is coming from. Any explosimeter should work well enough, for OP's purposes, straight out of the box with no adjustments/calibrating.
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Old 10-08-2017, 10:13 AM   #12 (permalink)
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Thanks for the responses guys, i will double check the fuel pump hoses but i know for 100% sure that the screws that were used to install the fuel pump are the originals. The fuel smell itself didnt start till a few months after the new fuel pump was installed. Not 100% sure without a second person helping, but the smell does seem to be coming out of the tailpipes. Guess it’s a good thing i picked up a fairly new set of injectors off of a fellow member here a while back lol
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Old 10-09-2017, 08:52 AM   #13 (permalink)
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Originally Posted by Z_ealot View Post
Tried searching, but does anyone know if itís normal for our Zís to have a strong gas smell when starting after the car has been sitting for a couple of hours?
Maybe the gas cap is going bad, heat expands the gas vapors while sitting ,and could be the culprit.
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Old 10-09-2017, 09:08 AM   #14 (permalink)
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Wasn't there some nissan tech article on the breather hose getting plugged? I think you can take your nissan in and have them check it for free.
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Old 10-09-2017, 11:19 AM   #15 (permalink)
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Wasn't there some nissan tech article on the breather hose getting plugged? I think you can take your nissan in and have them check it for free.
There is but it only covers the car up to 150,000 miles if i remember right and im sitting at almost 160,000
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