Raw gas odor from 91 Q45

[Infinitiace1992]

I don’t drive this car often but I’ve noticed a strong odor or raw gas after I drive my Q. There are no visible leaks on the ground nor do I see any gas leaking or dripping when I look under the hood. Does anyone have any suggestions on what I should be checking for?

[VStar650CL]

Check the plumbing on top of the tank, small leaks there will be nose-detectable but the liquid will generally evaporate without reaching the ground. Check your evap plumbing as well, various clogs or pinches in the ORVR and purge systems can cause detectable vapor.

[Infinitiace1992]

Check the plumbing on top of the tank, small leaks there will be nose-detectable but the liquid will generally evaporate without reaching the ground. Check your evap plumbing as well, various clogs or pinches in the ORVR and purge systems can cause detectable vapor.

I don’t detect any gas odor in the trunk or around the tank at all. All in the engine bay. I’ll check the evap plumbing as best as I can

[3Q Jay]

I don’t detect any gas odor in the trunk or around the tank at all. All in the engine bay. I’ll check the evap plumbing as best as I can

Many G50 with aftermarket fuel hose will 'seep' from the offending hose (usually under the octoplenum, unfortunately).
tightening the clamps will help, but may re-cur.
Note to garage ascent if monitoring this thread....be sure you line up your clamp heads for the fuel hose so you can access them after the upper plenum re-installed. Even with genuine nissan hose, which doesn't typically leak, you may find this useful.

[Infinitiace1992]

I don’t detect any gas odor in the trunk or around the tank at all. All in the engine bay. I’ll check the evap plumbing as best as I can

Many G50 with aftermarket fuel hose will 'seep' from the offending hose (usually under the octoplenum, unfortunately).
tightening the clamps will help, but may re-cur.
Note to garage ascent if monitoring this thread....be sure you line up your clamp heads for the fuel hose so you can access them after the upper plenum re-installed. Even with genuine nissan hose, which doesn't typically leak, you may find this useful.

Thanks 3Q. I’ll check to see if fuel hoses were replaced

[3Q Jay]

sure. but it's not just replaced.....it's...was genuine nissan hose used?
I can't tell you what's different, but the nissan hose simply doesn't leak.

[98_Q45]

I had this issue on mine, changing the fuel injectors got rid of it. And that wasn’t the actual issues I was looking for, but it worked.

I need to find a shop with a strong air hose so I can blow out the remaining charcoal bits in the purge line. Tried using tire inflator but would only spray out a small pile before blowing off again.

[Infinitiace1992]

I had this issue on mine, changing the fuel injectors got rid of it. And that wasn’t the actual issues I was looking for, but it worked.

I need to find a shop with a strong air hose so I can blow out the remaining charcoal bits in the purge line. Tried using tire inflator but would only spray out a small pile before blowing off again.

I hope it’s not the injectors as they were just replaced a few months ago via VH PERFORMANCE. It could be as they are not OEM injectors and I already had to replace two of them.