Strong fuel smell....

Giant Dan

Active Member
Senior Member

Giant Dan

Active Member
Senior Member
Feb 3, 2006
43
0
1,506
Do anyone experience strong fuel smell in the car while driving ..? The smell do not come frequent but occasionally. I believe something is wrong.. but i have sent my car for inspection at several mechanic and they do not detect any problem. Any sifu please comment.. Thanks

:hmmmm:
 

Cheongxp

Known Member

Cheongxp

Known Member
Oct 22, 2010
94
1
508
Selangor
This only happen in full tank condition & when driving uphill ?
I experience this condition, but this is come from fuel tank cover ( actual name i didn't know ) open but didn't know why it open & this is at rear side seat near to fuel tank area.
 

Giant Dan

Active Member
Senior Member

Giant Dan

Active Member
Senior Member
Feb 3, 2006
43
0
1,506
Bro cheong.. you mean the fuel cap.??? the place where we pump the petrol.?? or how do we access to the rear side seat..?? open up the seat..?? please comment. Thanks
 

Giant Dan

Active Member
Senior Member

Giant Dan

Active Member
Senior Member
Feb 3, 2006
43
0
1,506
cheong.. mind to share which mechanic that you send for the repair.. appreciate if you could let me have the contact and place. I had tried several mechanic also cant solve th fuel smell problem..
 

doraemon98

Known Member
Senior Member

doraemon98

Known Member
Senior Member
Feb 3, 2010
202
6
1,518
Penang
It could be the fuel tank under rear seat bocor, or the cover that cover the float on top of the fuel tank problem.
 

12savefuel

Known Member
Senior Member

12savefuel

Known Member
Senior Member
Dec 10, 2008
195
75
1,528
I also has a fuel smell problem on my A32 3.0L. I only noticed it after I fill the car up full. After some time when the level drops the smell no longer there. I also notice fuel dripped on the floor after I parked the car when the tank is full, no problem when the fuel level dropped.

So I check out all the hoses and they were ok. So I removed the rear seat opened up the metal cover covering the fuel hoses and pump + fuel sensor wiring. Had the car with full tank of gas and guess what I found that there was small hair line crack on the top of the fuel gauge sensor. This is the one where the fuel pump and gauge wiring couples to and the fuel supply and fuel return hoses enter the tank. The whole assembly is made of plastic and there was a very small crack. Fuel was coming out of the crack and filled up the whole top of the assembly. Had the car running and could see bubbles coming out from the crack. So when the tank was full to the brim the fuel was coming out from there and the internal pressure also pushes the fuel out. So when the fuel level drops. No more problem as the leak is from the top. So I dried it up and super glued the crack and so far so good. No more smell and no more leak.
 

doraemon98

Known Member
Senior Member

doraemon98

Known Member
Senior Member
Feb 3, 2010
202
6
1,518
Penang
Hairline crack ah? Just as I thought the rubber seal could be the culprit also.

I doubt Super glue could last. You can use epoxy next time it holds better.
 

12savefuel

Known Member
Senior Member

12savefuel

Known Member
Senior Member
Dec 10, 2008
195
75
1,528
My rubber seal was ok, the crack was near the socket for the fuel pump. I decided to use superglue first as its thinner and is able to flow into the crack properly. Will epoxy on top of the superglue if needs be next time. I also did a few layers of superglue so should be ok. Its got no load or anything on the crack so superglue should be more than enough.
 

dee889

Junior Member
Senior Member

dee889

Junior Member
Senior Member
Sep 10, 2008
22
0
1,501
KL
I also has a fuel smell problem on my A32 3.0L. I only noticed it after I fill the car up full. After some time when the level drops the smell no longer there. I also notice fuel dripped on the floor after I parked the car when the tank is full, no problem when the fuel level dropped.

So I check out all the hoses and they were ok. So I removed the rear seat opened up the metal cover covering the fuel hoses and pump + fuel sensor wiring. Had the car with full tank of gas and guess what I found that there was small hair line crack on the top of the fuel gauge sensor. This is the one where the fuel pump and gauge wiring couples to and the fuel supply and fuel return hoses enter the tank. The whole assembly is made of plastic and there was a very small crack. Fuel was coming out of the crack and filled up the whole top of the assembly. Had the car running and could see bubbles coming out from the crack. So when the tank was full to the brim the fuel was coming out from there and the internal pressure also pushes the fuel out. So when the fuel level drops. No more problem as the leak is from the top. So I dried it up and super glued the crack and so far so good. No more smell and no more leak.
Find mine have similar problem. Hv to find time to do the same...huhu
 

dee889

Junior Member
Senior Member

dee889

Junior Member
Senior Member
Sep 10, 2008
22
0
1,501
KL
car got accident history?
I just owned the car recently and the symptom it just similar as what bro 12savefuel mentioned. Visual inspection does not indicate the car had any major accident. Anyway as mentioned, will spare some time to check underneath the rear seat as suggested.
 

doraemon98

Known Member
Senior Member

doraemon98

Known Member
Senior Member
Feb 3, 2010
202
6
1,518
Penang
dee889 said:
I just owned the car recently and the symptom it just similar as what bro 12savefuel mentioned. Visual inspection does not indicate the car had any major accident. Anyway as mentioned, will spare some time to check underneath the rear seat as suggested.
Just use epoxy to cover back the cracks can ad.
 

option1978

Known Member
Senior Member

option1978

Known Member
Senior Member
May 25, 2009
213
83
1,528
Any possibility that fuel hose joints leaking? Had the experience but with my proton twice, once the supply hose & another time the return hose.
 

12savefuel

Known Member
Senior Member

12savefuel

Known Member
Senior Member
Dec 10, 2008
195
75
1,528
Once you open up the back seat you will be able to see the return & supply hoses and any cracks in the plastic unit. If it was the hoses the smell would be there permanantly. But this only happens when its filled to the brim.

So go and check when you have just filled up. The straight away go back home open up the rear seat and metal fuel protection cover then start the engine and inspect.

I was thinking of using epoxy, but the problem is that its a very fine hair line crack and epoxy is too thick to flow into the crack. I suggest:

1. Drive the car until the fuel has gone down.

2. Use high quality super glue like bostik or selleys. Don't use the cheap RM2 shop china type. And yes there is a big difference in quality. Seal up the crack and slowly apply making sure you seal it up properly.

3. Once fully cure for a day then epoxy over the super glue.

I have just used super glue and until now it has worked well and no problems so far.
 

hamtaro00

Known Member

hamtaro00

Known Member
Sep 26, 2011
279
39
528
Ipoh
try what 12savefuel suggested 1st, do keep us updated if u able to solve it.

experienced on my friend car b4. accident history. and the exhaust piping cracked. and somehow the gas seeps into the cabin. but that guy is so stiff necked that he still continue driving it >.<
 

dee889

Junior Member
Senior Member

dee889

Junior Member
Senior Member
Sep 10, 2008
22
0
1,501
KL
Managed to find the the root cause..yea Bro 12savefuel, you are right. Hairline crack at the fuel hose connector. Did the same as what you suggested. Wiil fill up full again and see how it goes ...







Damaged to the rear seat
 

12savefuel

Known Member
Senior Member

12savefuel

Known Member
Senior Member
Dec 10, 2008
195
75
1,528
Wah bro, your car looks damn dirty man. Mine didn't look so bad as yours. But good you found the leak. If the leak can't be fixed, then call up Sim Ghee and ask for Fuel Float Assembly. I think it was RM150-200+ when I asked. Can't really remember.

Good luck.