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Old 07-02-2008, 02:34 AM   #1
'93Impreza1.8T
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Question bad gas milage

i just finished my ej18t build and now i'm getting bad gas milage before the build i was getting about 320-350 miles to a full tank now i'm getting 125-145 to a full tank. my setup is: ej18 engine, 370cc sf injectors, turbo water pump, blow-through maf, fmic, parallel fuel mod, vf34 turbo set @ 8psi, wrx manifold, 3" tbe, catless up and dp. at first i thought fuel leak but no, then i thought someone is stealing it so i put locking cap and park it i garage still same problem. what else could it be? other than that it runs really well.
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Old 07-02-2008, 02:40 AM   #2
darksc00by
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are you tuned?
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Old 07-02-2008, 02:41 AM   #3
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you aren't scaled for those injectors. That is my guess.
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Old 07-02-2008, 11:49 AM   #4
Fail Wagon
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yeah if your not tuned your just sending too much fuel through your injectors because the ecu still thinks they are the stock size
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Old 07-02-2008, 12:05 PM   #5
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sounds like its running rich @ cruise..lols.

def scale bak them injeckers!
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Old 07-02-2008, 01:04 PM   #6
'93Impreza1.8T
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lol no tune
no engine management
running rich
at night when driving hard and i shift i hear a loud pop from the exhaust na dtheres a huge fireball coming out
car runs super great and is very reliable just getting the bad gas milage what is a decent em tht is not too pricey?
i'm just really happy tht its finaly running again na dthe turbo really made a big difference compaired to the way the car pulls in the non-tubo form ej18
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Old 07-02-2008, 01:08 PM   #7
darksc00by
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running rich is definitely not as bad as running lean.

get a tune man.


running too rich (sounds like it)
can cause your car to wash out its cylinder walls and/or destroy your piston rings.
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Old 07-02-2008, 01:16 PM   #8
'93Impreza1.8T
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Quote:
Originally Posted by darksc00by View Post
running rich is definitely not as bad as running lean.
thts true i would rather be running rich than hav a lean problem where its mor damaging to the engine

Quote:
get a tune man.
i'm going to but i still need a engine management before i can get a tune and i don't know which 1 to get

Quote:
running too rich (sounds like it)
can cause your car to wash out its cylinder walls and/or destroy your piston rings.
i didn't know tht thanks for the info what can do for now just till i get an em
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Old 07-02-2008, 02:35 PM   #9
mxpunk
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id just put the stock injectors back in and run 10 lbs with a rrfpr.

or get a emanage blue

im running 7 lbs with no em and get 25 mpg, lol
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Old 07-02-2008, 04:19 PM   #10
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i got better gas mileage when i went turbo, yihaw.!
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Old 07-02-2008, 07:35 PM   #11
'93Impreza1.8T
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just found my stock injectors and they're a little messed up from when i took 'em out of the fuel rails to put in the bigger ones
another question before i went turbo the cel was on and the only code that would come up was the tps sensor. now with the turbo and everything on the car there is no cel at all is that a good thing? i never touched the tps and no more cel.
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Old 07-02-2008, 07:41 PM   #12
darksc00by
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well first of all, I don't think putting the stock injectors back in the car is a good thing, now that you are a turbo setup you are going to use more fuel. If you put the injectors in you might run extremely lean. I say juts go get something to tune your car, and pay someone in TX a little cash to road tune the car.
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Old 07-02-2008, 07:53 PM   #13
'93Impreza1.8T
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u mean a tuner here in tx or a fellow impreza owner that has expirence with tunning
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Old 07-02-2008, 07:53 PM   #14
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im going to opt for option 2
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Old 07-02-2008, 08:12 PM   #15
'93Impreza1.8T
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lol thats what i was thinking i've seen a few scooby's here in town but never see any stopped where we can actually talk they are always on the road driving would a safc be a good choice or just save and get the emanage? the reason i say save is cuz i just finished working on my parents truck and now am low on cash again
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Old 07-02-2008, 09:53 PM   #16
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Used SMT6 (perfect power) for $250ish....
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Old 07-02-2008, 10:46 PM   #17
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I would recomend Emanage Ultimate, especially if you are ever planning on going an extra mile to create more power. Allows you to pull timing and adjust AFR a lot better than emanage blue or pp6 or anything. I've been told its worth the extra cash, thats why I'm going to be shelling it out
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Old 07-03-2008, 01:50 AM   #18
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http://forums.nasioc.com/forums/show....php?t=1547861

I don't know if he can do it. But they rave about him.
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Old 07-03-2008, 02:03 AM   #19
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Quote:
Originally Posted by darksc00by View Post
http://forums.nasioc.com/forums/show....php?t=1547861

I don't know if he can do it. But they rave about him.
Is this car still running on the original stock ECU?
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Old 07-03-2008, 02:04 AM   #20
darksc00by
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Yes. He is contemplating a piggyback or some kind of ECM
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Old 07-03-2008, 02:13 AM   #21
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Quote:
Originally Posted by darksc00by View Post
Yes. He is contemplating a piggyback or some kind of ECM
I dont have much experience with the older imprezas but if you could wire in an 02 wrx ecu then it could pretty much be dialed in as if it was on a stand allone. This would probably require some innovation from a wiring perspective, but it would be pretty inexpensive.

I'm suprised the car runs at all with a blow thru MAF and everything ..pretty crazy..
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Old 07-03-2008, 02:17 AM   #22
'93Impreza1.8T
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i am willing to settle for a blue if ne1 has a good used 1 at a decent price as i dont have very little cash at the moment just for kicks and giggles heres my setup the date is wrong i just took the pics 7/2/08







sorry bout the big pics i dont know how to resize them on photobucket, did u knotice the rear disc conversion? i will post a driving vid tmw i am loading it on u tube right now its just a shot of the dash while i was on the highway.
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Old 07-03-2008, 02:30 AM   #23
'93Impreza1.8T
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here's the vid and if thshadow can help me out that would be a huge helping hand and yes i am on the stock '93 impreza l ecu how hard would it be to wire in the '02 wrx ecu into my car being that i only have 1 cam sensor?

http://s218.photobucket.com/albums/c...t=S5030385.flv

Last edited by '93Impreza1.8T; 07-03-2008 at 01:00 PM.
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Old 07-03-2008, 07:55 PM   #24
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Quote:
Originally Posted by turboL View Post
i got better gas mileage when i went turbo, yihaw.!
are u serious ??? thats crazzy
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Old 07-03-2008, 11:36 PM   #25
'93Impreza1.8T
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are u serious ??? thats crazzy
thats wut im sayin i wish it was like that for me
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