So hopping out of the driver's side after shutting it off, I can smell unburnt gas fumes. this follows a CEL that popped up 2+weeks ago that resulted in a dead coil, which got changed, and an evap system code, which I have not yet resolved, and then a P705 and now last week the VTEC freaked out and the tach was bouncing around @ 3K when VTEC would normally shift the timing. So I just changed out the o-ring down there, so I know the VTEC filter is not clogged, so I am going with a bad solenoid, which I have yet to order, but that shouldn't give me the odor, AFAIK. BTW, the VTEC has been a charming prince since the one incident, but I plan to replace it anyway b/c of age and b/c I don't like to look at MILs on the dashboard.
Any clue as to where to begin investigating the fuel smell??
I would suggest to check all of the codes first before tackling the problem. It could be a misfire or a cylinder that is not firing properly because of a bad coil on plug. As you have posted you had a dead coil it could be another one is going bad or its already bad. After driving & smelling the unburned gas fumes. Take out the spark plugs 1 by 1 then smell the tip of it. Don't wait long as unburned fuel is bad for the Cat converter. It will kill it prematurely.
Not likely your problem, but if the fuel rail was pulled and new o-rings were not put on the fuel injectors you will get a fuel smell. Unless your nose is clogged, this cause is very easy to isolate, too!
I had the knock sensor done over 1K mi ago. Not sure if the fuel rail comes off for that job. But since one of the injectors was unplugged afterward, I suppose that is likely.
I have changed the 3 front coils already, but have not gotten to the back yet b/c well, its more work. That is scheduled for tomorrow. When the one coil was bad, I could smell the unburnt fuel out the exhaust. This is up front and the exhaust smells clean and relatively odorless.
Funny, I have the same issue out of the blue. Gas smell when engine hot and after sitting. Noticed rear bank smells worse but can't see anything. Just bought upper and lower injector o-rings so next weekend project.
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