Horrible mpg horrible gas smell stumped.

[pontiacgp]

besides the oil on the plug that plug does not look like it came from an engine burning rich enough to get 8 mpg

 

[MrSony]

I intend to do just that just have to find available time. I do have a charcoal canister which is currently hooked to the old return line and the second port is plugged because when I ran with it unplugged it didn’t seem to improve the situation any it seemed to make the fuel smell even worse.

Yea my next tank I’ll do 89 because 91 is premium so I’m hoping I don’t have to go that far considering the price difference


Sent from my iPhone using Tapatalk

Again, Charcoal cannister must be hooked to the bowl vent (if a qjet), and the vent line. Not the return. Most g bodies had a feed/vent and no return.

 

[Stupidquestionspro]

Charcoal cannister is hooked to the vent line and then the other line is hooked to the carb


Sent from my iPhone using Tapatalk

 

[olds307 and 403]

besides the oil on the plug that plug does not look like it came from an engine burning rich enough to get 8 mpgoknm de

I agree, that is terrible mileage. That ring still might be seating or seated during running and left evidence on the plug. Since you live in Florida, make sure you have your choke set on the bare minimum, same with the choke pull off opening, a much as it will allow. I probably and not fair off 8 mpg but that is very short runs with the choke on most of the time. I would still crawl under and check for leaks.

 

[Malibu795]

What's cruise vacuum # and when does power enrichment come in in relation to vacuum? Cruising while in power enrichment will kill MPG extremely quickly.

Seams you've already swapped gas to eliminate random bad tank of gas..
I also loose mpg to blended 10-15% blended crap vs straight gas..
Air filter clogged?