99blackbirdls1

i have a 99 ta and i only get 17 miles to a gallon of gas what could be causing this i have read that you usally get 22/24 miles to a gallon im lucky if get 300 miles on a tank and no i dont floor it every time i take off lol please help gas is killing the fun this car should bring....

white2001s10

iTrader: (4)

Scan it for misfires and/or spark knock.
Also put a wideband O2 on it to verify it's holding closed loop AFR properly.

99blackbirdls1

thank you for your reply but i have no idea what you are talking bout sorry i dont know to much bout cars thats why i let others work on them ... can you be more detailed please... thank you scott

BlackHawk T/A

iTrader: (3)

If you are talking about in city driving, your mileage is normal. If that's 17 on the highway then something is wrong...

Mike2kZ

iTrader: (3)

I wouldn't compain... I get 12-13 mpg... and I drive 50/50 highway/city

white2001s10

iTrader: (4)

Scanning software like Auto-Tap or EFILIVE running on a laptop and hooked via cable to the diagnostic port on your dashboard.
You run the program while driving the car, and the data will display things like fuel-trims, O2 sensor output, and misfires. Some software will tell you which cylinder is misfiring.

The wideband O2 sensor goes into one of your rear O2 sensor holes in the exhaust pipe. it hooks directly into a controller/display and when used properly will show your actual air/fuel ratio on the display while you drive.

This is considered basic troubleshooting, and you should find a shop that can do this.