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Old 08-09-2012, 07:07 AM   #1
grimspd
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Default 02 wrx is killing me

02 wrx Cobb tbe, 06 sti tmic, grimspeed upipe, 255 walbro, kompact bov 100% recirc, sti pinks, vf48, stage 2 clutch light weight fly wheel, spt short RAM, mishimoto rad and rad hoses, samco ic hoses. More mods but not related to the problem.

Pro tuned but lost faith in tuner

So after I did the vf48 swap pinks, sti tmic and fuel pump and had it tuned. The car starts rough kinda rough idle and in 4th and 5th gear wot it seems like its not getting enough fuel and lulls in and out ( tuner flow tested and cleaned injectors before install ). Talked to tuner said it was clutch slipping replaced clutch same problem but know I am getting misfire codes. Replaced all spark plugs and had timing belt done with clutch. Just got a compression tester and built a boost leakage tester haven't done either yet no time.

Please help me
Sorry for spelling and grammar
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Old 08-09-2012, 07:11 AM   #2
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Figure the misfires are due to light weight flywheel also had no cell codes until fly wheel was installed.
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Old 08-09-2012, 07:43 AM   #3
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Misfires on all cylinders or mostly cylinder 3? Your Fuel rail may be your limiting factor if that is the case, may want to do parallel fuel rail mod or go with aftermarket fuel rails. How many miles are on it, may want to clean up your maf as well.
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Old 08-09-2012, 07:58 AM   #4
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Quote:
Originally Posted by KOJAK-02-WRX View Post
Misfires on all cylinders or mostly cylinder 3? Your Fuel rail may be your limiting factor if that is the case, may want to do parallel fuel rail mod or go with aftermarket fuel rails. How many miles are on it, may want to clean up your maf as well.


OMG...where Do you people COME from

_______________________________

OP...forget the fuel rails....it aint that

id bet the tune is junk....and the 'pink' injectors arent likely big enough....they werent for me with a 16g
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Old 08-09-2012, 08:12 AM   #5
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Take it to jotech in dallas.. AS above im guessing its a junk tune but it possible theres other problems
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Old 08-09-2012, 08:19 AM   #6
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First off thanks for the replies....The misfires have mostly been cylinder#4 however I didn't start getting the cels till after I installed the light weight fly wheel which I guess will give ghost misfire cel codes. I was also thinking it could be the injectors
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Old 08-09-2012, 09:20 AM   #7
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it definately sounds fuel or tune related. Check all your fuel filters and post up a data log if you have an AP or have access to one
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Old 08-09-2012, 10:38 AM   #8
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Quote:
Originally Posted by grimspd View Post
First off thanks for the replies....The misfires have mostly been cylinder#4 however I didn't start getting the cels till after I installed the light weight fly wheel which I guess will give ghost misfire cel codes. I was also thinking it could be the injectors
It's your flywheel man.
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Old 08-09-2012, 10:57 AM   #9
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Search ......I made a thread on misfires and the common causes and possible solutions. And without a datalog with a wide and you will be hard presses to get concrete answers
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Old 08-09-2012, 12:54 PM   #10
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have your tuner turn off the CELs for p0301-4 if you no longer wish to see them from the light weight flywheel.

Do the boost leak test, then report back. You can install pinks into a stock ECU car and it will idle just fine (stable). Since you report it is rough then I'm guessing the turbo inlet is torn, or there is an air leak some where in the system (boost leak test will find this). In short, the tuner would have to be an idiot to not be able to get it to idle smooth since it takes virtually no changes to do so Change the scale size and you are set. Maybe fidget a little with the MAF table for the intake, but it should still idle smooth on those injectors.

As someone else pointed out, you will be running out of injector size depending on how aggressive the tune is done. It will be close.

The surge in the higher gears:
You need to data log and see what is going up and down. Is it boost pressure, timing advance, etc. That will explain quite a bit.

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Old 08-09-2012, 01:08 PM   #11
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3 cylinder? no turbo heat shield heating that area up and the story begins...otherwise you've got a bad turbo, the most common 1/3 cylinders to give up. do a compression test for sure. rough idling prob from bad injectors? goodluck
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Old 08-11-2012, 04:51 PM   #12
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Thanks for all the replies going to let it sit for a week of vacation will report back after compression test and logging.
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Old 08-11-2012, 08:52 PM   #13
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Quote:
Originally Posted by grimspd View Post
Thanks for all the replies going to let it sit for a week of vacation will report back after compression test and logging.
I run the same setup with cams. You need to check everything, my flywheel doesn't do that and the injectors are fine.
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Old 08-12-2012, 09:19 AM   #14
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3 cylinder? no turbo heat shield heating that area up and the story begins...otherwise you've got a bad turbo, the most common 1/3 cylinders to give up. do a compression test for sure. rough idling prob from bad injectors? goodluck
bad turbo?

1 + 3 are the most common failures?
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Old 08-19-2012, 02:44 PM   #15
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Compression test complete all 150's thank the subaru gods next boost leak test. Here's a noobie question I have an ap for the 2010 wrx can I use the data logging on the 02 wrx
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Old 08-19-2012, 04:22 PM   #16
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The only AP that will work on your car is: ap-sub-001.

Stephen
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Old 08-20-2012, 07:04 PM   #17
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Pretty good boost leak test have some super brittle hose ordered ancillary hose kit
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Old 08-26-2012, 03:39 PM   #18
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The only AP that will work on your car is: ap-sub-001.

Stephen
^ this is false unless i am off base by the naming convention. ap-sub-001 is the version 1 ap that can not be unmarried from a car thro the device. There is a version 2 ap that can be used for 02-04 wrx and i believe it is called a ap-sub-002. Dont think a bad turbo will cause misfire. If compression is good then it is probably the tune or the flywheel. Do some research on that specific flywheel to see if others have had the same issue and if it is the cause i would suggest switching back to a heavier flywheel just because, personally, i would not want to delete misfire detection from my car.
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Old 08-27-2012, 09:46 AM   #19
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Originally Posted by rhymeboy89 View Post
^ this is false unless i am off base by the naming convention. ap-sub-001 is the version 1 ap that can not be unmarried from a car thro the device. There is a version 2 ap that can be used for 02-04 wrx and i believe it is called a ap-sub-002.
V1 AccessPORT
AE-WRX-PORT-02 = 2002-2003 WRX

V2 AccessPORT part numbers
AP-SUB-001 = 2002-2005 wrx
AP-SUB-002 = 2004-2007 sti, 2006-2007 wrx, 04-06 foresters and Legacys
AP-SUB-003 = 2008+ WRX / STi models, 07-2011 LGT and FXT

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Old 08-27-2012, 12:09 PM   #20
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I had a misfire in cylinder 4 and it took me soo long to figure out the culprit. It ended up being bad coil packs.. i would check those out. My car acted the same way you described and once i changed those out it was back to normal.
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Old 08-28-2012, 09:39 AM   #21
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Pretty good boost leak test have some super brittle hose ordered ancillary hose kit

Ancillary hose kit does NOT come with all of the hoses that you need. Actually it comes with some pretty unnecessary hoses, such as the one that dictates your bpv.





I went to subaru to order the kit, it comes with all of your hoses/T-fittings/restrictor pills for wastegate, boost control solenoid.............

>>>>>>>>>>>>you should do the same. Seriously.
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Old 09-07-2012, 07:02 AM   #22
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New coil packs ...much better no more misfires
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Old 10-02-2012, 08:40 PM   #23
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thats sweet. new sparks too?

Last edited by coalslaw; 10-02-2012 at 10:29 PM.
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