I'm only getting 300 mi. on a full tank -- what gives?? (94 auto g20 106k)

[tim-may]

I bought it Aug 2001 with 98k and gas mileage has been dropping slowly ever since?

[cliffud]

300 miles per tank is pretty average for me...

if i don't stomp on the gas, i get about 330.

if i do... i get about 280.

the only modification i have is advanced timing and a header. ever since i got those two things done though, it's hard to keep my mpg up because i'm having so much damn fun stomping on the gas!

soooooooo- perhaps that's your problem?

god- i don't even want to see what will happen once i put my CAI on. i'll probably get 2 gallons per mile.



by the way- 1993 P10 with 101,000 miles


-clifford

[Primal SMX]

Check your O2 sensor as i checked mine on my P11 even though the check engine light did not come on at all. I replaced it and straight away i felt a power increase in the low end and my economy went up too.

[tim-may]

cliff -- yea, I occasionally mash the pedal in between fill-ups .. oops :sun: I suppose I'll try not doing that for a few hundred miles or so ..

primal -- Are the o2 sensors easy to check? Oh, and are there just 2?

[TIZAO]

Originally posted by cliffud
300 miles per tank is pretty average for me...

if i don't stomp on the gas, i get about 330.

if i do... i get about 280.

the only modification i have is advanced timing and a header. ever since i got those two things done though, it's hard to keep my mpg up because i'm having so much damn fun stomping on the gas!

soooooooo- perhaps that's your problem?

god- i don't even want to see what will happen once i put my CAI on. i'll probably get 2 gallons per mile.



by the way- 1993 P10 with 101,000 miles


-clifford

Hey I love your websites start out....love the ATB! but hey would you so kindly send me an e-mail on how you advanced your timing please I dont get it!>>>>>thank you! [email protected] :alien: :licker: :smoka: :flash:

[Primal SMX]

primal -- Are the o2 sensors easy to check? Oh, and are there just 2? [/b][/quote]

I'm guessing you've got an OBII system which i dont. Mine only has one sensor and it was real easy to pull out. What i did was spray mine liberally with carb cleaner and when it was dry i re-installed it.
Sorry but i do not know much about the second sensor but there are plenty of old threads on this subject.

I hope this helps

[poppy_morenito]

Ok Where is the O2 sensor. If someone could do one of those " Picture for Dummies" with the arrow Photoshoped in I'd appreciate it ....

[JustinP10]

Damn, i must really have a lead foot then... i only average high 2x miles in the city, 3x on the highway, if i drive on the highway. How many gallons do you normally fill up with, after a 300+ mile tank?

[cliffud]

ok yeah- if a G20 has over 100,000 miles...

does the O2 sensor need to be cleaned/replaced????

i kinda remember having one that hooks into the header (now i kinda wish i cleaned it while everything was out and when i swapped to a HS one)

the o2 sensor that goes to the header is REALLY apparent...

look for two wires that go to something that looks like a spark plug which sticks into your header.

the other one: uhhhhh- i dunno.

-clifford

[ky_infiniti2000]

Originally posted by cliffud

the other one: uhhhhh- i dunno.

-clifford [/b]

The other O2 sensor is bolted into the cat-convertor.

[tim-may]

Justinp10 -- I'm not 100% positive, but I think I put in 13-13.5 gallons after 300 miles or so (I'll check next time I fill up)

[boingo82]

That's still 23 mpg. This car is rated 21-29 City-Highway by EPA. You're not doing too shabby considering you're driving with a lead foot. (I'm assuming.)