3Pedals_6Speeds

I searched this main area and only a couple fuel smell topics came up. I'm a new owner (1st week) and I'm getting wiffs of fuel smell when stopped through the vents. If I have the fans off (raining lately so top up) I don't seem to smell as much. It's not strong, fairly light. The PO mentioned he'd done something with gaskets or o-rings on the car when I was buying, but now I cannot recall specifics, and he's not answering follow-up questions (despite my assurances I understand the car is as-is, I'm just looking to know what he did).

He was pointing to the top of the engine, I'm guessing fuel rail, and further guessing it might be o=rings on the injectors? Simple thing to fault isolate, or do I let the dealer look at it? 1st week with the car, apologies for incorrect terminology if I'm explaining this incorrectly.

3Pedals_6Speeds

Gas cap is tight BTW.

yamahaSHO

I would start looking for fuel leaks in the engine bay.

3Pedals_6Speeds

PO replied, said he suspects the o-ring (or gasket?) between the fuel return fitting and the fuel rail itself. I looked here: https://www.s2ki.com/s2000/gallery/i...14s2a0-e03gif/ but cannot figure out which part that might be.

rich85tpi

To the op, check the fuel injectors.

I had a similar problem on my 2005 a few years ago. I ended up replacing all the o rings on the injectors, and possibly one of the injectors. I'll have to check my receipts when I get home.

zeroptzero

If you are smelling it through the vents you have a fuel leak in the engine bay.

There are some specialty washers around the fuel return hose just under the fuel pulsation dampener, and the dampener needs to be torqued down properly to give a good seal. If the previous owner messed around with the fuel system he would have removed the pulsation dampener more than likely when relieving fuel pressure. Energize the fuel pump with the car off, and look around that area with a flashlight, rub your hands around the fuel rail. The fuel pulsation dampener is that round UFO looking thing in the middle of the fuel rail, the plastic cap lifts off, pull the fuel rail cover off (black plastic cover), and look around with a bright light while the fuel pump pressurizes the fuel rail.

3Pedals_6Speeds

I pulled the cover that's on top of the fuel rail off today and examined the area. Despite the PO's assertion the injectors were not the problem, #1 and #3 are weeping fuel when the system is energized. Given my newness with this car, and desire to be driving rather than wrenching, I'm gonna let this early issue get sorted out by a pro, just in case it isn't the o-rings, and is more involved.

Thanks for the suggestions, I'll report back in a couple days after the repair on what was actually replaced.

zeroptzero

Good decision, we've seen a couple S2000's go up in flames due to fuel leaks. You should order some new O-rings for the injectors from Honda, your issue is probably caused by bad injector top o-gings, and maybe improper fuel rail installation. Good luck with the repairs.