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Lousy fuel mileage

1255 Views 23 Replies 8 Participants Last post by  Guest
What kind of mileage do you guys get? I think I'm getting lousy mileage at ~27 mpg on the highway. Here's what's new on my engine in the past year:
O2 sensor
Distributor cap/rotor button
NGK plugs
NGK wires
JWT intake
Hotshot headers
Pacesetter cat-back
timing at 17 degrees

I've also:
regrounded MAF
cleaned throttle body
cleaned BPT, or whatever it is
checked/adjusted TPS

I'm at a loss. I get ****-E milage around town, too. Maybe I'm driving too fast?

92 SE-R from Heck
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On the highway mine isnt that bad. Usualy somewhere around 30. I am one of the few that actualy drive the speedlimit so mine may not be too good to compare to. And my automatic, cruises at ~72mph at ~2900rpm's. I try to keep it below 3000 while on the highway cause Im shooting to make the tank last as long as possible. Sometimes I will get over 300 miles to a tank sometimes not. Around town my his utter ****. I sometimes wonder if I get over 20mph in town. You dont seem to be too far down on the mileage...what kinda rims you running? I noticed with Eric's 16"s I got hella better gas mileage. But I would possibly get rid of those NGK plugwires for some stock ones. That may net a couple MPG. But 27 isnt too bad I dont know many that get much higher.
Well Ive gotten times when i was in the mid to high 30's which kinda makes me think the speedo is off then on again. Cause this last tank i got 300 miles to 3/4 of a tank (8 gallons on fill up) which is 37.5 miles to the gallon. Which I dont know if thats right or not. Need to pull out the map and see what Elizabethon to Nashville is exactly. People keep saying you cant get that with a se-r so I dont know. As for picking up your mileage on the highway, just use cruise, dont go insainly fast stay around 70(which is a bit better for me with the auto tho), dont do any darting around be smooth, dont get impatient just let curise do its job.
I never go by my fuel guage. I go by how many miles and how much gas i can squeeze in the tank. I just said 3/4's cause it was down to 1/4, which really means nothing because as usual with classics its way off. At the pump I put in right around 8 gallons, dont feel like pulling out my recept right now. But the trip meter was right around 300, maybe a hair shy. I reset it with each fill up to judge an mpg per tank. A few times Ive noticed above 30 mpg's according to the trip/pump.
The tank is 13.2 Even tho I have never seen the bottom of it. Gas light comes on(which in reality means nothing to a classic) Ive driven around quite a bit more, then fill up, squeeze maybe 10 to 11 gallons. Think the most I ever got in it was 12 gallons. Been too scared to see how far I can go...
Well the timing actualy helped mine. Well timing it up to 15 instead of like 10 where it was at for some reason. And seems like when ever i stick in 92 (which is rarely) i do get a little better but havent in so long dont know. I use 89 and it does well. Considering that I dont have the timing bumped up high.

LOL thats my old sig you cant use that sig.....

93 classic (Automatic, Stuff)
used to be bone stock not much more now

Thats my opinion and I could be wrong

93 classic
Aztec Red, Automatic, POP, STB, OEC battery tie down, AD22VF's, Pirelli P4000's

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What I did was block down the peddal and sprayed A LITTLE carb cleaner on the TB, but then soaked down a couple paper towels. Then just scrubed it that way as best as i could. But it wasnt that dirty. I swear I think its the low ports that have more of a problem with it, or later years with more emmisions stuff. Mine wasnt that dirty, not gunky like most people say they get. I havent cleaned it in a year, and its not that bad still yet, need to check it soon just for the heck of it.
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