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Old 07-29-2013, 09:52 AM   #1
Limasubaru
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Default Help: car runs like crap after intake install

Just installed some eBay intake and now my car barely runs and barely stalls. Stutters when you start to drive. I have BOV installed to.. I reset my ecu and still sounds like crap. Any suggestions?
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Old 07-29-2013, 09:54 AM   #2
dirtcollector
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Take it off and put your stock one back on that will not work without a tune
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Old 07-29-2013, 09:55 AM   #3
nmlittlebigman
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Go back to stock airbox and ditch the BOV.
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Old 07-29-2013, 09:57 AM   #4
SouthernWRX
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You need a tune when you upgrade your intake. I'd baby her until you get the stock intake back on there.
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Old 07-29-2013, 10:05 AM   #5
cmiovino
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At first, I actually wanted to call "troll" on this one. I don't think that's the case however.

Go back to your stock intake. The only intakes I'd run without a tune would be the Cobb SF or SPT for the 2002. A random eBay ones is bad. Not to mention, who knows the filtering properties.

Also, ditch the BOV. The stock one is just fine.

I'd highly suggest more reading before spending more money. You'll thank me later for saving money on mods and a new engine if you continue down this path

Good luck!
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Old 07-29-2013, 10:19 AM   #6
Limasubaru
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Not to sound like an idiot but I am, could the map sensor effect it in anyway? I tried to get it on all the way but it just wouldn't sit in the hole so I just screwed it on as far as it would go and didn't seem like there was any gaps I could see....
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Old 07-29-2013, 10:35 AM   #7
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Quote:
Originally Posted by Limasubaru View Post
Not to sound like an idiot but I am, could the map sensor effect it in anyway? I tried to get it on all the way but it just wouldn't sit in the hole so I just screwed it on as far as it would go and didn't seem like there was any gaps I could see....
You are probably talking about the Mass Air Flow (MAF) sensor and it is probably your problem. You can quickly confirm that by disconnecting its wiring from the engine bay wiring harness. If the car runs fine, then you've installed your MAF sensor backwards. MAF sensor installation is counter-intuitive because its wires should be pointing to the front of the car even though its wiring harness connector is in the opposite direction.
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Old 07-29-2013, 10:36 AM   #8
HinshawWRX
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So the MAF sensor isn't even installed correctly? That's a problem.
Ebay intake? Also a problem.
BOV? Problem.
Contrary to others, using an intake on an 02/03 without a tune isn't entirely a problem.

Resetting the ECU doesn't help anything, and will now take longer to learn parameters.
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Old 07-29-2013, 10:41 AM   #9
Limasubaru
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Quote:
Originally Posted by Cocoa Beach Bum View Post
You are probably talking about the Mass Air Flow (MAF) sensor and it is probably your problem. You can quickly confirm that by disconnecting its wiring from the engine bay wiring harness. If the car runs fine, then you've installed your MAF sensor backwards. MAF sensor installation is counter-intuitive because its wires should be pointing to the front of the car even though its wiring harness connector is in the opposite direction.

The MAF sensor is pointing forward... Does it make a difference if it's not sitting right? If I disconnect it, won't it not do anything different to how the car runs?
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Old 07-29-2013, 10:48 AM   #10
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I may be wrong but if you disconnect the maf and it runs better it is because the ecu has preset parameters instead of getting interpreted air data from the maf for finer a/f mixtures.
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Old 07-29-2013, 10:59 AM   #11
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Everyone is giving you great advice, time to start following it!

Remove the Ebay intake, and BOV if you can. Your car will thank you for it.
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Old 07-29-2013, 10:59 AM   #12
Limasubaru
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Quote:
Originally Posted by atech34 View Post
I may be wrong but if you disconnect the maf and it runs better it is because the ecu has preset parameters instead of getting interpreted air data from the maf for finer a/f mixtures.
I'll try it when I get back home from my oral sergeon appointment and see if it makes a difference.
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Old 07-29-2013, 01:32 PM   #13
Limasubaru
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Quote:
Originally Posted by Limasubaru View Post
I'll try it when I get back home from my oral sergeon appointment and see if it makes a difference.
Unplugged the MAF sensor and started it up and ran perfectly fine. I think it's just not sealed right.
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Old 07-29-2013, 01:39 PM   #14
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so much fail here. please be nice to your car and don't install ebay intakes. also ditch the bov and re-install the maf sensor correctly. what the hell is wrong with people?
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Old 07-29-2013, 01:40 PM   #15
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Quote:
Originally Posted by Limasubaru View Post
Just installed some eBay intake and now my car barely runs and barely stalls. Stutters when you start to drive. I have BOV installed to.. I reset my ecu and still sounds like crap. Any suggestions?
I put the reasons why your car runs bad in bold.
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Old 07-29-2013, 04:40 PM   #16
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Waiting for the blow-up mod
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Old 07-29-2013, 05:00 PM   #17
08legacy207
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Subscribed for the neon undercarriage lighting to come.
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Old 07-29-2013, 05:04 PM   #18
02bugeyed
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Sell your car and buy a Honda, you can slap the finest eBay finds on them and still run it like a champ.
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Old 07-29-2013, 05:07 PM   #19
Mike05wrx
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ditch the crappy eBay intake and take the bov off too. you need a tune for both of those, unless it's a cobb or spt intake
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Old 07-29-2013, 06:12 PM   #20
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I bet it has one of these on the side of the fender too.

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Old 07-29-2013, 06:20 PM   #21
turbo_dreams
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Quote:
Originally Posted by Limasubaru View Post
eBay intake
Most of the problem is right here.
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Old 07-29-2013, 09:41 PM   #22
cbr600f3
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Quote:
Originally Posted by Limasubaru View Post
Just installed some eBay intake and now my car barely runs and barely stalls. Stutters when you start to drive. I have BOV installed to.. I reset my ecu and still sounds like crap. Any suggestions?
Damn you just did two things that will blow up a Subaru turbo

Put stock intake and bpv on and call it a day.
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Old 07-29-2013, 10:14 PM   #23
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Quote:
Originally Posted by Limasubaru View Post
Unplugged the MAF sensor and started it up and ran perfectly fine. I think it's just not sealed right.
unplugging the MAF doesn't solve the issue of altered airflow due to intake changes. On a stock car the stock ecu can deal with an unplugged MAF. On a car with breathing mods, unplugging the MAF and saying "hey it runs great" will end in one of my favorite Saabrally.com sayings:

"It sounded terrible, then the (engine) noise stopped, and so do the moving (of the car)"
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Old 07-30-2013, 01:57 AM   #24
Limasubaru
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You guys can all **** off. I figured the **** out myself and the car runs perfectly fine now. My car and I can do what I want to it. If I want I WILL BLOW UP MY ****ING TURBO. I don't care. I'm ****ing 17 owning my own wrx for a first car that I built from a parts car and all you ****ers probably had some ****ty 120hp 3 cylinder garbage cans.
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Old 07-30-2013, 02:09 AM   #25
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Come at me bro!
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