help

[WhatWRX]

alright last week went driving down the road and my car (07 wrx) threw a cel. went to my work (advance auto) and scanned the car. i had 3 codes p2096 post catalyst fuel trim bank 1 system to lean and i also had that same code pending. the other code was p0303 cylinder 3 misfire detected. i aslo had my rear o2 throw malfunction codes in the past so i dont know if this had anything to do with this.

mods are: aps cai 70mm, perrin inlet, walbro fuel pump, sti tmic, hks ssqv bov, and tbe no cat. also snowman tuned for all of these parts.

if you have any ideas i liked to hear them. thanks mike

[WhatWRX]

also i have erased the codes and checked for vacum leaks and no cel yet

[KAX]

might be time to think about getting rid of that CAI. The only good intake for our car is stock. Only time you need to get of it is when you go with a FMIC.

if its reading too lean post-cat with a catless exhaust, then you seriously are too lean.

[ryan_west06]

+1 on the intake. that is kinda big

[schoellnasty]

The intake shouldnt be a problem considering hes tuned for it. Id check for vacuum leaks. OP, are you notcing any driveability issues?

[cpages2]

might be time to think about getting rid of that CAI. The only good intake for our car is stock. Only time you need to get of it is when you go with a FMIC.

if its reading too lean post-cat with a catless exhaust, then you seriously are too lean.

Usually I always agree with you man... However the whole "Intakes are pointless in Imprezas" is kinda been put to bed. I have seen way to many dyno graphs on 07' and 08' STI/WRX's that show getting cooler faster flowing air has helped.


OP,
I would look into the BOV. I know it sounds weird but I have seen lots o' ECU post lean codes when things are actually super rich... For instance I had to run my EVO 100% atmosphiric for a few weeks until some parts came in. I through so many "Lean in Bank 1" codes. As soon as my parts came in and I went back to 100% recirculation no more lean codes.

I know for a fact my car was rich as hell because my plugs where destroyed after this was done. And its just common knowledge FUEL - AIR + SPARK = RICH.

Just my .02 cents.


Also whats weird is I was also throwing those same codes on my 04' WRX after I did Prodrive Intake, Nvidia DP, APC UP, SPT Cat Back and Snowman tune. I cleared it out once and it never came back. So just keep an eye out.

I wouldnt panic.

- Mike

[WhatWRX]

yea thanks for the input every one. i havent noticed any drivability issues the car still runs strong like the first day i got it or stronger since i had it tuned. but i havent found any vacum leaks but i can always go look again. also i thought about the bov but i had the car tuned with it on recirculating to. i hope it just dosnt come back.
thanks mike

[josh06wrx]

i would look further into the lean issue. it would be worth your money to have a shop check AFR's at the dp versus the tail pipe imo. i saw 2 cars with similar setups pulled off the dyno for running too lean at the big valley grand opening<says the guy who just paid several k's to have his engine rebuilt. it may be nothing but its cheaper to check out good now than fix it later.
give me a call mike

[WhatWRX]

will do ill give you a call tomorrow

[KAX]

you cant tune for a BOV, so throw that idea out the window. The intake can be tuned for, but it doesnt mean its done right. Snowman has said himself that he's had trouble before with certain intakes. I know he doesn't like my APS, for instance.

what sort of power levels were the cars getting that you were talking about CPages? Obviously when you get into high power levels, stock parts start becoming restrictions. But I havent seen a lightly modified car benefit from an intake yet, only suffer

[cpages2]

you cant tune for a BOV, so throw that idea out the window. The intake can be tuned for, but it doesnt mean its done right. Snowman has said himself that he's had trouble before with certain intakes. I know he doesn't like my APS, for instance.

what sort of power levels were the cars getting that you were talking about CPages? Obviously when you get into high power levels, stock parts start becoming restrictions. But I havent seen a lightly modified car benefit from an intake yet, only suffer

I have seen several posts on Nasioc and few other articles at other outlets say that the cars are benefiting from Intake.

For instance when I had my 07' STi there where tons of people that where just running Catback, Intake and Tune that saw some amazing numbers on Dyno. I have talked to several 08' Owners that are just running CAI (AEM and P&L) with AP and have reported the car coming alive.

I could be wrong. It just seems like the days of Intake being useless on our cars are over.

I have run an intake on almost every impreza I have owned and it always improved IMHO. I know for a fact that my WRX has horrible hesitation issues out the box, then I installed Prodrive Intake and reset teh ECU and I never had any hesitation again.

- Mike

[KAX]

but with every instance you meantion, the intake isnt the only change. Every single example you gave me either included a tune or an ECU reset. That in and of itself will make the car feel different.

but im not going to get into this any further. the intake debate can go on forever.

Ill leave it with what I said earlier. Think about ditching the intake and it might fix your problem. If you still have the stock one, then its only a few minutes of install which could save you months of pain.

[specVmatt]

well i just got tuned at bvp with gadiel.. i have no muffler, just a straight pipe. and an aem cai. 274whp 278wtq. i think thats pretty good. im sure not having a muffler helps but ill bet its not give me 50 whp thats for sure.

i still have my cats btw, just no muffler.

[WhatWRX]

well probly thursday im gonna be going to bvp to get a afr test done so ill know for sure if it is running lean

[SnowMann]

The intake can be tuned for, but it doesnt mean its done right. Snowman has said himself that he's had trouble before with certain intakes. I know he doesn't like my APS, for instance.


He has an APS 70mm CAI of which Ive tuned several. (BTW: thanks for the the 'lil dig about it not being done right. ;) )
Your APS pod (http://www.maperformance.com/store/product.php?productid=16757) on the other hand, is too short and results in a disproportianate amount of turbulence causing erratic MAF readings. So yes, I hate yours...

[cpages2]

He has an APS 70mm CAI of which Ive tuned several. (BTW: thanks for the the 'lil dig about it not being done right. ;) )
Your APS pod (http://www.maperformance.com/store/product.php?productid=16757) on the other hand, is too short and results in a disproportianate amount of turbulence causing erratic MAF readings. So yes, I hate yours...

owned. lol

What do you think the problem is Jeff?

[ryan_west06]

lol

[ryan_west06]

alright last week went driving down the road and my car (07 wrx) threw a cel. went to my work (advance auto) and scanned the car. i had 3 codes p2096 post catalyst fuel trim bank 1 system to lean and i also had that same code pending. the other code was p0303 cylinder 3 misfire detected. i aslo had my rear o2 throw malfunction codes in the past so i dont know if this had anything to do with this.

mods are: aps cai 70mm, perrin inlet, walbro fuel pump, sti tmic, hks ssqv bov, and tbe no cat. also snowman tuned for all of these parts.

if you have any ideas i liked to hear them. thanks mike


Change out the o2 and see if that works!

[KAX]

He has an APS 70mm CAI of which Ive tuned several. (BTW: thanks for the the 'lil dig about it not being done right. ;) )
Your APS pod (http://www.maperformance.com/store/product.php?productid=16757) on the other hand, is too short and results in a disproportianate amount of turbulence causing erratic MAF readings. So yes, I hate yours...

no worries, mate. wasnt cracking you or anything, just relaying what you've told me before and wasnt sure what other intakes you had problems with.

im just trying to make sure everyone knows tuners are human, too. You may be good, but it doesn't mean you'll get everything right.

[WhatWRX]

just to let you all know i changed the rear o2 sensor and the code hasnt come up since. thanks for all the input and help.

[ryan_west06]

wow! and this is what jeff told you to do in the first place.

[WhatWRX]

yea jeff was right

[flystiguy01]

Jeff...... IS ALWAYS RIGHT!!

a lesson lived is a lesson learned.