My STi threw a CEL!! Plz help!! :(

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Dec 27, 2003 | 09:16 PM

pyrojohnhippy

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My STi threw a CEL!! Plz help!! :(

Ok, had my headers and aps TBE installed and all was running fine until just like 20 minutes ago. I was in 4th gear at 6.5K when I shifted to 5th. Right when 5th set in I felt a little knock and my check engine light came on, and my "cruise" light started flashing. I was goin uphill and I was passing someone when this happened. Doesn't seem like it's affected the performance of the car. But I don't know what caused this and what to do. SOMEONE HELP!!!!

thanks

Dec 27, 2003 | 10:41 PM

dashiet

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does your car surge now? if it surges how bad?

Dec 28, 2003 | 12:41 AM

mario

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From: Flying on the H1 w/ 75 psi of compression on all 4 cyl

Car Info: PnP VF30 w/ STi injectors Perrin intake walbro fuel pump w/ a TXS TBE

Dude w/ all that free flowing exhaust on that STi your car probaly over boosted and you hit fuel cut. Time to port n polish that waste gate. http://www.deadboltspeed.com/ < these are the guys my friend sent his turbo to. But he recently found these guys but i have never heard of any one using them but that doesn't mean they don't do good work--->http://www.ma-motorsports.com/turboporting.php If you wanna see some pics of a vf39 waste gate unported and a pics of a ported waste gate to comare LMK. There is a noticable difference.

Dec 28, 2003 | 01:15 AM

awns729

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From: Rockland County...NY

Car Info: want a WRX

i really dont know much about this stuff but could it be a leak? did ya change the gaskets?

Jan 2, 2004 | 02:15 PM

pyrojohnhippy

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Same problem haunting me!!

Ok... So my friend in santa rosa had one of those ODBII *reader thingys....* heh. He checked the codes to see what popped up, and he found that the CEL was due to overboost "P0244" was the code. And I found out how my catless setup is working without throwing a CEL at me. The secondary O2 sensor was disabled.. good or bad?? I dunno.. Well I was driving down to santa barbara from where I live and I started to notice why this could be happening. Note- "This kind of boost never happened with my stock exhaust.. I.E.- Boosting over .1 ." I have one turbo boost gauge and with my stock exhaust it "never" boosted over .1 ... But now with my Invidia headers and my APS 3.5" catless TBE I noticed if i push it hard enough it'll boost up to .14 in 4th, 5th, and 6th gear when full throttle over 5K. And that's when my cell light came on. And yes... unfortunately it has come on again. I was in 6th gear going almost 125 mph at around 4.5K and my boost read .12 and I hit fuel cut.. I thought the STi was governed at 145mph...??? Maybe i'm just driving it too hard.. I dunno.. But my CEL/Cruise light is back on, and this time it wont turn off, and this happened during another long drive. I don't know what I can do to fix this, and I don't know how serious of an effect this is having on my turbo/engine or whatever. Am screwing anything up by driving it this hard? I'm looking to add quite a bit more power to my car. But i'm waiting for the Accessecu to come out for the STi in feburary before I have these upgrades installed:

APS SR50 Turbo
APS D/R500 FMIC
APS CAI
APS FMIC Dual Vent BOV
APS Improved Fuel System
Cobb AccessEcu
Fluidyne Radiator
Unorthadox Racing Lightweight Flywheel
Unorthadox Stage 2 Ceramic Clutch Kit
Perrin Pulley

Would this be a bad upgrade? Any problems forseen over the problems I already have? I'm pretty sad with what's going on with my car now. If I could figure out how to fix this so my car could run ok i'd get this stuff done. Plz help!

thanks

Jan 2, 2004 | 02:20 PM

mario

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From: Flying on the H1 w/ 75 psi of compression on all 4 cyl

Car Info: PnP VF30 w/ STi injectors Perrin intake walbro fuel pump w/ a TXS TBE

I have n experince w/ the SR-50 but i hear its an excellent turbo. I'm pretty sure something so well built and expensive should not allow you to over boost or spike as long as the boost isn't too high. Have fun w/ that setup it looks like you really will.

Jan 3, 2004 | 01:59 PM

go go go

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I was driving my friend's STi on race track and exact same thing happened.
CEL and cruise light started flashing.. then all the warning lights came on.
I wasn't sure what happened but the tach showed that the engine has shut down by itself.. I was running around 70mph.

after resetting the ECU, the car run fine.

so it was overboost huh?

the STi was bone stock.

Jan 3, 2004 | 03:46 PM

qbbraveheart

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From: Brooklyn, NY

Car Info: Sold my 05 Evo...Carless for a while...then 05' WRB STi whenever lol :(

Quote:

Originally posted by go go go
I was driving my friend's STi on race track and exact same thing happened.
CEL and cruise light started flashing.. then all the warning lights came on.
I wasn't sure what happened but the tach showed that the engine has shut down by itself.. I was running around 70mph.

after resetting the ECU, the car run fine.

so it was overboost huh?

the STi was bone stock.

in your case...im gonna go all out and say you had close to a 1/4 tank left of gas...went around a corner really sharp(duhh..you were at the track

) and the car shut down

theres been threads about how if youre at a 1/4 tank or less and you go around a sharp turn the fuel pickup wont get the fuel and the motor will stall out

Solution: keep the tank above 1/4 tank

Jan 3, 2004 | 08:56 PM

dashiet

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lol....i ran out of gas pulling out of my garage half way. maybe the warm-up wasnt worth it

-dashiet

Jan 3, 2004 | 09:45 PM

#10

qbbraveheart

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From: Brooklyn, NY

Car Info: Sold my 05 Evo...Carless for a while...then 05' WRB STi whenever lol :(

true story???

Jan 4, 2004 | 01:36 PM

#11

pyrojohnhippy

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What effect is overboosting having on my turbo and engine? Am is it destroying anything costly to repair? "that isn't being replaced.."

Jan 5, 2004 | 05:05 PM

#12

Stevied

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From: USA

Car Info: 4 wheels

You should hit fuel cut before you damage your engine. It's around 17.5PSI of boost I believe.

If you disable that then you could damage your engine on overboost.

Jan 6, 2004 | 10:59 PM

#13

SuboobaruWRSEX

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From: Michigan

Car Info: Viper ACR & H1

My car did the same flashing CEL, and Cruise. I had the cruise on and my car is bone stock. There was only 995 miles on it when this happened. CEL code PO345 - cam sensor.

Nick