You are 100%..... .....correct! :agree: I can guarantee, the more time you spend around these cars, the more things you are going to see & hear about that are "not supposed to be like that". It's amazing what some people will do to "fix" a problem, especially if they are selling a car & don't want to spend money on it.
I had the same issue looked high and low. it actually turned out to be the gas cap. the tank is pressurized. I honestly laughed after days of dealing with this. worth a try.
Hi radracer007, when you had the problem was the fuel smell coming through the aircon vents and only when getting up around 2000revs?
no it was when i was stopped or driving slow. when i was revving up a bit. it was in the cabin but not in the air conditioning vents. I did my heater core and ac this year. gutted the whole cabin. If it isn't coming from the engine bay there is no way the smell can get into a moving car that way. Maybe swap a gas cap with a buddy just to eliminate the possibility. Not joking i was literally in tears after looking into every other thing, then found that. fuel filter, engine bay lines, on and on. if not the gas cap somewhere else upstream id look first just to keep it simple. also easier to eliminate before getting under the hood. sounds like a real gremlin. best of luck!!
Yeah, my Z had a full respray not long ago and I've just recently discovered a rubber seal missing from the rear of the bonnet thats supposed to keep engine smells from entering the air vents intake, when the aircon fan is on full you can feel the air being sucked into the the intake and this is how the smell is entering the cabin. As stated by East Coast Z there should be no fuel smells around the engine bay at all so after checking all hoses and fuel components its time to hand it over to the workshop and have the injector seals checked, not that I can see a problem there but there is nothing left to check, fingers crossed.
The rubber bonnet seals..... ......are there to stop hot air from the cooling system & engine entering the air vents at the bottom of the windscreen. Where in N.S.W. are you?
yes thats right, without the rubber there the hot air plus any smells from the engine bay can enter the vent system. I Live in Bateau Bay on the Central Coast
I had very similar I ripped off the fuel pipe from tank to filler and had the reducer welded in place and refitted but I had problem only on full tank and hard cornering to that side. hope that helps the engine bay ones that caught me out were right up front under the bit between the throttle bodies and another time under the battery box those lines it was clamp area that had cut in over time small leaks both times also the fuel hard line on top of plenium can get bent removing the fuel lines to from filter and mine had smallest of splits in the bend itself of the hardline on the underside help my experiences can help fuel filler would happen more on full tank, for me good luck
Cheers hitmanz, most of my fuel lines have were replaced last year and also have checked the ones under the battery. I have booked my car into the workshop that installed the injectors last year to make sure there isn't an injector seal leaking.
Finally stopped the fuel smell entering the cabin, received and installed the new rubber seal that clips under the bonnet near the air intake vents and no more smells. Still have to track down the fuel leak, Its booked in to the workshop tomorrow to check-out the injectors, there are two injectors showing slight but dry stains below the seat, fingers & toes crossed.
If your rubber seal turns out to be a placebo and you notice the smell come back heres a few things to check: - Fuel pump seal. This seals the tank shut in your boot. There are vents in the boot which are under the side covers, and these MAY be recirculating the aircon. That could explain why its ony when the aircon is on. Could always test it by removing the trims and putting plastic bags over the vents them going for a drive with the aircon on. - Fuel hoses. I know they were recently replaced, but check the markings on them. If its regular fuel hose its not made for the high pressure of an EFI engine, it needs to be EFI hose. Fuel can actually weep through the regular hose under pressure, which will give you the smell, and you cant smell it with your head over the engine bay because the fans blowing the smell away. - Hose clamps. If your mechanic reused the old factory clamps replace them. Its not often it happens, but the fatigue in a clamp thats been retightened a dozen times can eventually make them go slack. Its like $30 for enough EFI clamps to do the whole bay, and it will rule them out too. - Pinched injector O-ring. Your mechanic may have pinched an o ring slightly when installing the injectors. Depending on severity it may not leak under low fuel pump speed, but as the pump puts more pressure in (which may well be at 2000rpm) the pressure becomes too high for the seal to hold. Let us know how you go.
Thanks for the reply. I doubt its coming from the rear section because when running with the aircon off theres no fuel smells in the cab, not even over a 2 hour run. I had the workshop check the car out yesterday and they can't find any problems with the injectors, fuel lines, filter or regulator, they are speculating (because they have exhausted all other avenues) that the problem could be the carbon canister, I questioned this because the canister isn't located in the engine bay but they telling me whilst driving a vacuum is created in the engine bay and the engine bay will suck air in from anywhere possible. Guess the only way to check that theory is to replace the canister, take off the bonnet rubber and go for a run!
Sometimes those carbon canisters pop out top/bottom cover. Venting fumes in the air... So if that is the case close it down and try it out....
Year when I checked it a couple of weeks ago the bottom plate was hanging off and after fixing it back in place, no difference. I cheated when I did it tho, I did it from the wheel bay so I couldn't see the vacuum lines where they connect at the top, guess I'll have to take the front bar off after all.
If you had plate hanging off i would revisited the issue and try to silicone the plate back to the canister... Use the money planned to spend on new canister on something that you ride will benefit from... Charcoal canisters are essentially created to decrease the amount of air pollution the vehicle creates and also (increase its fuel efficiency "yeah right"). The charcoal canister traps and absorbs fuel vapors from the fuel tank and the carburetor of a motor vehicle when the engine is not running. When the engine is running, the fuel vapors in the canister are absorbed through a vacuum hose into the intake manifold and put back into the system. If your Z is NA than "fuel vapors in the canister are absorbed through a vacuum hose into the intake manifold and put back into the system" But if your Z is TT than there is no vacuum unless idling thus charcoal canister is acting same as engine not running and you can feel the smell of juice in the cabin.
