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Lately my 390 with 480cfm 4v has been stinking like gas during heavy engine braking..... But when I get back on the gas the stink goes away??????
The fuel delivery system is new, as far as pump,carb, and lines go. I haven't found any leaks anywhere in the delivery section but I did see some gas+antifreeze pooled up under my distributer a couple days ago.... Gone now but it was there.
My guess is maybe the intake gasket?
Driveability is still good, I'm averaging 11-12mpg hauling firewood/shake wood, still pulls like a skidder. lol, dragged a one cord tree out of the bush the other day for firewood
Ok sorry i was no help at all Is it possible that you might have a leaky line somewhere? My 71 montego had a dry rotted line right at the pump and it whas spraying a thin mist of fuel all over and it stunk......but when i was moving obiosly i couldnt smell it because the air was shuffleing it under the car and out the back. Other than that i would just make sure everything is good-en-tight!