The lovely smell of gas fumes!

[M240Z]

Whats up everyone! I just got my 240z on the road from doing suspension mods and I have it running really good now! I know my car is a 40 year old Datsun but is there any reason why my car smells like gas a lot? I'm just trying to trouble shoot it. I don't think I have an exhaust leak, but I think it's the fumes are coming from the exhaust because it smells when I'm warming it up and seeps i into the interior of the car. I was wondering If theres any way I can reduce the stench? It doesn't really bother me, but I'm tried of my girlfriend complaining about it!! :baby:

[Tristin]

Check out all the fuel hoses connections at the tank. You could have a loose hose... Ive had a similar problem.

[M240Z]

Check out all the fuel hoses connections at the tank. You could have a loose hose... Ive had a similar problem.

Will do! Thanks. Could the fumes also be because the carbs are running rich?

[DAT510]

Check filler neck too.

I believe a line other than the fuel line should go to the front, in the engine bay. it goes into a valve which goes into the intake.. well at least on the 510 it does.. :lol:

[ggzilla]

There are only two possibilities:

1. Fuel leak. Even a drop will make a smell

2. Exhaust leak

 

For the exhaust, it could be the air pump/air injection, a leak in the header or crack in the manifold, exhaust pipe not sealing well

 

OR, a missing rubber plug on the firewall or floor, so a backdraft is pulling the exhaust from the back of the car into the passenger compartment.

[fourfiveten]

mine was bad from a plugged fuel filter and a resulting leaking fuel pump. and the old fuel lines already mentioned to the tank

[MikeRL411]

Don't forget to check [what in my opion] may be the culprit. The intake foam air filter on the carbon cannister. The cannister may never really go bad, but the foam intake filter will clog up with the usual underhood crap and impede proper operation of the carbon cannister.

[DanielC]

Check the PCV system too.

[datzenmike]

I don't think the carbon canister was used for a few more years.

 

PCV system is a good one. See if the hose from the valve cover has come off or the larger block vent hose under the intake/exhaust manifolds that goes to the PCV valve. On early systems there was a tank vent hose that also connected to the PCV system.

 

Check the Door and window seals.

[M240Z]

Thanks for all the help everyone! Im going to check this stuff tomorrow!!!