Jump to content
SAU Community

New Fuel System, Bad Gas Smell, Advice

richsrq

By richsrq,
in Engines & Forced Induction

 Share

Recommended Posts

richsrq Apprentice

richsrq

Posted
Posted (edited)

I have installed a new surge tank, 6AN, 10AN lines and external pump and a Tomei fuel rail in the car and have a really bad smell of gas. I do not have the lid (cover) bolted down because the way I am running my lines but know of someone that has his cover off as well and he gets a very faint smell. I am also missing my rear speakers so the fumes penetrate the inside of the car.

I can let the car run for twenty minutes and use lintless blue towels and wipe all the fittings and where it comes out and back into the tank and surge tank and I never find the towels get wet. I have posted a couple of pics to show how I did it. Can pressure be pushing past the black ring the holds the intank pump in place? Is the gas tank sealed on the bottom of the car so when the top cover is on it is completely sealed? The original breather is still plugged in.

Has anyone else gone through this? I am scared to start my car. I have to open it up for a few minutes to clear the fumes out.

IMG_0472.jpg

IMG_0476.jpg

Edited by richsrq
400kw Collaborator

400kw

Posted
Posted

mate im going through the same sort of thing ..i would try and put the filler from the standed tank to the bottom of the surge tank ,then have the return form engine above that ,and then have the return to standed tank out ofthe top if that make sense....are you using speedflow fittings ?

i have gone right through my car and put sealent stuff on all fitting ,it has made it better .

just my thoughts cheers

richsrq Apprentice

richsrq

Posted
  • Author
Posted
mate im going through the same sort of thing ..i would try and put the filler from the standed tank to the bottom of the surge tank ,then have the return form engine above that ,and then have the return to standed tank out ofthe top if that make sense....are you using speedflow fittings ?

i have gone right through my car and put sealent stuff on all fitting ,it has made it better .

just my thoughts cheers

I will look into relocating the line you were talking about. I am using AN fittings. I used a liquid teflon on all the fittings going into the surge tank (they leaked before I did that and they were a 3/8 NPT) and it stays dry. I did not put sealant on the AN side of the fittings though.

Swiper the Fox Grand Master

Swiper the Fox

Posted
Posted (edited)
any fuel system in the boot is going to stink out the car. nothing you can do about it

change the lines to teflon or hard metal bent pipe and your smells will disappear.

its the rubber line 'sweating' fuel. Funny thing is when we race the car with leaded fuel...no smell...its only unleaded that sweats.

Edited by DiRTgarage
R31Nismoid Grand Master

R31Nismoid

Posted
Posted

You can buy lines/hose that do not sweat, they are not cheap however :P

I get a nice smell everytime i get in, honestly you do get used to it and 30 seconds of driving with the windows down gets rid of it.

You notice it more in the heat, in winter mines not bad... one day ill get the expensive hose!

PSI Parts Veteran

PSI Parts

Posted
Posted

Teflon hose is not as expensive as you may think, the expensive part is changing all the hose ends as they are completely different. We do have SAU pricing on all Earls products though.

Here is a picture of what we did to help combat the dreaded fuel smell. I'm also happy to report that the fuel smell from all the teflon lines is only noticeable once in a blue moon, although I'm building an enclosure for the surge tank which should help even more.

post-28667-1231899716_thumb.jpg

richsrq Apprentice

richsrq

Posted
  • Author
Posted
Teflon hose is not as expensive as you may think, the expensive part is changing all the hose ends as they are completely different. We do have SAU pricing on all Earls products though.

Here is a picture of what we did to help combat the dreaded fuel smell. I'm also happy to report that the fuel smell from all the teflon lines is only noticeable once in a blue moon, although I'm building an enclosure for the surge tank which should help even more.

I would of thought that the line I was using and the fittings were the best to get. The amount of money I have spent to make this was stupid. I hate learning the hard way. Is the teflon hose a rubber hose with black teflon on the outside?

PSI Parts Veteran

PSI Parts

Posted
Posted

The line and fittings you used are excellent for reliability and burst pressure, they just aren't the best for keeping the fuel smell in.

Teflon hose is a semi-solid inner teflon core with a braided stell outer, it can also be in a nylon sheath.

Swiper the Fox Grand Master

Swiper the Fox

Posted
Posted
I would of thought that the line I was using and the fittings were the best to get. The amount of money I have spent to make this was stupid. I hate learning the hard way. Is the teflon hose a rubber hose with black teflon on the outside?

no teflon hose is the same as the hose you have but inside instead of having black rubber its clear/white plastic (teflon) and needs different style fittings to fit it.

richsrq Apprentice

richsrq

Posted
  • Author
Posted
no teflon hose is the same as the hose you have but inside instead of having black rubber its clear/white plastic (teflon) and needs different style fittings to fit it.

What kind of fittings work with the teflon hose? Are they the barbed type that you need to soak the ends of the hose in boiling water to expand it so to get the hose on?

Thank you all for your input.

PSI Parts Veteran

PSI Parts

Posted
Posted
What kind of fittings work with the teflon hose? Are they the barbed type that you need to soak the ends of the hose in boiling water to expand it so to get the hose on?

They are the same style screw on AN fittings you have used before, however they use an olive to give a good seal.

This picture shows teflon braid and fittings, the easiest way to determine if the line is teflon is that the hose end will have a slight curl up where it meets the hose.

Image002.jpg

just curious the guys using teflon how abouts do you go connecting it to the stock fuel pump cradle? just a normal hose clamp over the hose?

We used an EFI hose clamp, not just a normal hose clamp. Which was the same way we attached the hose to the hard fuel lines running under the car.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • GoHashiriya
      From Japan and back to Europe, my sh*tbox R34 GTT

      By GoHashiriya · Posted

      Cheers. Skyline is back on the menu, can’t get rid of it. It’s like a child you don’t want, or herpes 
    • Dose Pipe Sutututu
      From Japan and back to Europe, my sh*tbox R34 GTT

      By Dose Pipe Sutututu · Posted

      Welcome back brother 
    • GoHashiriya
      From Japan and back to Europe, my sh*tbox R34 GTT

      By GoHashiriya · Posted

      I got back to Japan in January and was keen to get back on track as quickly as possible. Europe is god-awful for track accessibility (by comparison), so I picked up a first-gen GT86 in December just to have something I could jump into right away. The Skyline came over in a container this time and landed in early January. It was a bit battered after Europe, though—I refused to do anything beyond essential upkeep while it was over there. The clutch master cylinder gave out, and so did the power steering. I didn’t even bother changing the oil; it was the same stuff that went in just before I left Japan the first time. Naughty. Power steering parts would’ve cost double with shipping and taxes, so knowing I’d be heading back to Japan, I just postponed it and powered through the arm workout. It took a solid three months to get the car back on the road. Registration was a nightmare this time around. There were a bunch of BS fees to navigate, and sourcing parts was a headache. I needed stock seats for shaken, mistakenly blew 34k JPY on some ENR34 seats—which, of course, didn’t fit—then ended up having the car’s technical sheet amended to register it as a two-seater with the Brides. Then there’s the GT86. Amazing car. Does everything I want it to do. Parts are cheap, easy to find, and I don’t care what anyone says—it’s super rewarding to drive. I’ve done a few basic mods: diff ratio, coilovers, discs, pads, seat, etc. It already had a new exhaust manifold and the 180kph limiter removed, so I assume it’s running some kind of map. I’ve just been thrashing it at the track non-stop—mostly Fuji Speedway now, since I need something with higher speed after all that autobahn time. The wheels on the R34 always pissed me off—too big, and it was a nightmare getting tires to fit properly under the arches. So I threw in the towel and bought something that fits better. Looks way cleaner too (at least to me)—less hotboy, less attention-seeking. Still an R34, though. Now for future plans. There are a few things still outstanding with the car. First up, the rear subframe needs an overhaul—that’s priority one. Next, I need to figure out an engine rebuild plan. No timeline yet, but I want to keep it economical—not cutting corners, just not throwing tens of thousands at a mechanic I can barely communicate with. And finally, paint. Plus a bit of tidying up here and there.  
    • The Bogan
      NC MX5

      By The Bogan · Posted

      Nope, needed to clearance under the bar a little with a heat gun, a 1/2" extension as the "clearancer", and big hammer, I was aware of this from the onset, they fit a 2.0 with this intake no problems, but, the 2.5 is around 15mm taller than a 2.0, so "clearancing" was required  It "just" touched when test fitting, now, I have about 10mm of clearance  You cannot see where it was done, and so far, there's no contact when giving it the beans Happy days
    • GoHashiriya
      From Japan and back to Europe, my sh*tbox R34 GTT

      By GoHashiriya · Posted

      It's been a while since I've updated this thread. The last year (and some) has been very hectic. In the second-half of 2024 I took the R34 on a trip through Germany, Italy, France and Switzerland - it was f*cking great. I got a little annoyed with the attention the car was getting around Europe and really didn't drive it that much. I could barely work on the car since I was living in an inner-city apartment (with underground parking). During the trip, the car lost power steering in France - split hose - and I ended up driving around 4,000kms with no power steering.  There were a few Nurburgring trips here and there, but in total the R34 amassed just shy of 7,000kms on European roads. Long story short, I broke up with the reason I was transferred to Europe for and requested to be moved back to Japan. The E90, loved it. It was a sunk cost of around EUR 10,000 and I sold it to a friend for EUR 1,500 just to get rid of it quickly. Trust me, moving countries f*cking sucks and I could not be bothered to be as methodical as I was the first time around.
×
×
  • Create New...