Getting low MPG, Help
#1
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Getting low MPG, Help
alright i filled my tank, drove 216 miles and filled it again and it took 15.5 gallons to fill, so if i do the math i'm only getting 14 mpg. wat the heck? according to the sticky i should at least get around 16-17 mpg. any possible ways to fix this? i also have an apexi intake so i don't know if that raises or lowers the mpg, since i'm a total car llama.
driving: 90 gxl na
driving: 90 gxl na
#2
Can't help you, but I get better mileage in my TII, I have a racing beat cat-back, f-con, boost controller, walboro 255 fuel pump.
I would say check your o2 sensor, and cat (clogged), but I don't really know.
I would say check your o2 sensor, and cat (clogged), but I don't really know.
#4
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she runs well. a problem with a hot start once in a while but nothing a blip of the throttle doesn't fix. would changing the fuel filter and cleaning the fuel injectors help?
#5
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Originally Posted by TiGeRC|aw
she runs well. a problem with a hot start once in a while but nothing a blip of the throttle doesn't fix. would changing the fuel filter and cleaning the fuel injectors help?
#7
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Perform a routine 60K tune up (plugs, wires, timing, compression, etc...), then check your fuel scheduling-related sensors at the ECU (TPS, AFM, the temp sensors, O2 sensor, etc...)
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/troubleshooting-your-car-ecu-340578/
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/troubleshooting-your-car-ecu-340578/
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#8
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haha i read the name of this thread and was like
"getting low MPG....help"
and i thought to myself.... "what in the **** is retard-boy thinking, complaining about getting low gas mileage out of an RX-7.... dumbass!!"
then i read the actual thread, and then once again i thought to myself "i'm really hungry.... i want a sandwich."
so i made a sandwich
and it was good
-Andrew-
"getting low MPG....help"
and i thought to myself.... "what in the **** is retard-boy thinking, complaining about getting low gas mileage out of an RX-7.... dumbass!!"
then i read the actual thread, and then once again i thought to myself "i'm really hungry.... i want a sandwich."
so i made a sandwich
and it was good
-Andrew-
#9
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do you have a stock fuel pump? A walbro can kill your MPG. After putting a walbro in my 89 I opted for a FD in my 87, big difference, I get the same MPG with the FD pump. Other than that I get about 19 city and 24 hw in general unless I drive it hard alot. The tune up sounds good too me.
#11
Rotary Freak
Do you have all three cats still in place? If so, remove them. Now. Or get them replaced, whichever you prefer. Clogged cats are a possible culprit.
But first do what everyone else says - that 60k mile service.
But first do what everyone else says - that 60k mile service.
#13
Rotary Freak
Originally Posted by mythe7
^^^ same here. i got 16mpg and i thought maybe something was wrong from my usual 18-19 and i realized i had just floored it alot in that last week and a half.
#14
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if this was your mileage for one fill up then I'd wait and decide after the next tank to see if what your mileage was. If it is still out of normal range then go for the 60K tune up and check your engine diagnostic codes.
#15
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Originally Posted by snub disphenoid
I drive hard and I average 20mpg in the city, so I don't know why everyone gets like 15mpg when they really get on it.
#16
mine was getting low mileage for awhile, and i kept thinking it was something wrong. I was getting 12-13 on a stock N/A with emissions removed because it was all broken. I tried to keep my foot out of it as much as possible and saw just over 20 mpg this last tank... 8mpg makes a big difference. I went from getting just under 200 miles a tank to this last one being 320
Patrick
Patrick
#19
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Originally Posted by Tessai
My completely stock '90 GXL just saw 13mpg...
#21
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Originally Posted by Impreza2RX7
Thats pretty damn sad, my TII wit ha Walbro and 850CC secondaries gets about 20MPG..
#22
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Originally Posted by Andrew89GTU
haha i read the name of this thread and was like
"getting low MPG....help"
and i thought to myself.... "what in the **** is retard-boy thinking, complaining about getting low gas mileage out of an RX-7.... dumbass!!"
then i read the actual thread, and then once again i thought to myself "i'm really hungry.... i want a sandwich."
so i made a sandwich
and it was good
-Andrew-
"getting low MPG....help"
and i thought to myself.... "what in the **** is retard-boy thinking, complaining about getting low gas mileage out of an RX-7.... dumbass!!"
then i read the actual thread, and then once again i thought to myself "i'm really hungry.... i want a sandwich."
so i made a sandwich
and it was good
-Andrew-
#24
Rotary Freak
You could get the RB header/presilencer and swap it with your stock exhaust manifold and cats whenever emissions rolls around. That's what I did for a while, but pretty soon my car will stink so bad it'll make your eyes water.