Thread: terrible gas mileage?

What plugs?

Clean air filter?

Clean the MAF sensor.

Any other engine codes? SES on?

Buy a new upper o2 sensor, if original.

What year of car?

Tire's properly inflated?

Random missfires could indicated a bad plug, wire, or coilpack.

it is a 00 gtp i put autolite 606s and tires are set at 30 with nitrogen
also how do you go about cleaning the maf, my k&n is clean, and no i recently checked my codes cause ses came on and only reason was my ****ty rear 02 sensor didnt go off for almost a month after the catless dp install but only code was the rear o2 sensor going off.

30 is too low IMO. I always do 34-36 psi.

What gap did you put them at. I do .050 to .055.

remove maf and spray with maf cleaner.

Originally Posted by rynoman03

Random missfires could indicated a bad plug, wire, or coilpack.

Add ICM to this list as well as bad gaskets.

Factory tire reccomendation is 35, I run mine a little higher.

You clean the maf by spraying MAF cleaner on the sensor. Don't use anything but MAF cleaner.

You said you have a catless downpipe, any other mods?

dont feel bad blue, my gas mileage is 15.2 on my 05 n/a for watever reason lol

how much sh1t you got in your trunk?

Its a possibility that the catless downpipe is your issue since you don't have a pcm.

I forget the details on how that system worked before 01 though. I know 01+ Needed an O2 simulator or tune.

sLpGPGT My 05 N/A 100% stock gets 30 MPGs, you're doing something wrong.

Originally Posted by Explicit_Spade

Its a possibility that the catless downpipe is your issue since you don't have a pcm.

I forget the details on how that system worked before 01 though. I know 01+ Needed an O2 simulator or tune.

sLpGPGT My 05 N/A 100% stock gets 30 MPGs, you're doing something wrong.

ppl keep telling me cause its my heavy foot, but i highly doubt thats the only reason, unless i needa reset and the 15.2 read is wrong, but idk ill figure it out eventually

I guess this hasn't been mentioned in this thread yet. Don't rely on your DIC for accuate mileage estimates.

Do the math manually for the best results. Gallons / Miles = MPGs takes about 10 seconds to do before leaving the pump.

ill do that first before i do anything, and yea it doesnt feel/look like i get 15.2 mpgs but thats what it tells me and everytime im like i doubt thats right

Originally Posted by Explicit_Spade

I guess this hasn't been mentioned in this thread yet. Don't rely on your DIC for accuate mileage estimates.

Do the math manually for the best results. Gallons / Miles = MPGs takes about 10 seconds to do before leaving the pump.

HMMM...After cross multiplying, Gallons squared = Miles squared.
Think you better check your math. LOL

Originally Posted by Explicit_Spade

I guess this hasn't been mentioned in this thread yet. Don't rely on your DIC for accuate mileage estimates.

Do the math manually for the best results. Miles / Gallons= MPGs takes about 10 seconds to do before leaving the pump.

Fixed

did you replace your fuel filter? are you using 93 octane? your rear having a code up could effect your mileage, as said before, try to find someone local who knows how to tune and have them give you a custom one. that will help alot.

its miles divied by gallons bro but hes right the DIC is never right usually ofe by 2-3 miles per gallon

skip the 3.4 with only a downpipe, you'll make things worse.