I have no codes or check engine light but car is running rich.

 

No other symptoms? How many miles on the O2 sensor?

 

car smell like gas from rear someone told me to check 2-way valve by gas tank and spark plugs are black

 

how can yu tell if charcoal canister is shot still no check engine light thats what it keeps leading to at least thats what everyone keeps tellin me

 

Not a fan of throwing parts at a problem but I had a bad O2 sensor causing very rich running and no CEL. CO emissions were six times what the state allowed, HC double. A new O2 sensor fixed it right up.

A new, direct fit O2 sensor is $44 from at least one of the auto parts stores.

 

My only questions;

Are there any mod's done to the car?

Tune up stuff is up to date?

 

rebuilt tranny about four months old

 

But how about work done to the motor..anything done there.?

 

If you checked the normal culprits (air filter, plugs, idle speed, timing) then I'd check the vaccum line to the FPR, and the fuel return line. Unplug the vac to FPR and idle should change (increase), squeeze the return line with pliers (wrapped in tape) and idle should go up. Do this squeezing for a very short period because it puts strain on the FP (few secs).