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Old 03-11-2007, 10:20 PM   #1
adWRXi
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Default just installed a up/dp and the car is acting strange!! help!

i just installed an invidia catless bellmouth and a helix flex up pipe. i went out for a test drive and im having a few problems. when i press the gas down half a centimeter or so, theres a thundering/ratteling/sputtering/thumping sound that i can even feel coming from around the turbo area. this happens when i first let go of the gas also. the turbo spool is obnoxiously loud at all rpms except when idle. the turbos seems to kick in at 2200 rpm, BUT then it does out at 4000 rpm.. wtf?? all the gauges are fine. even the boost gauge. the car runs normally if i shift before 4k rpm except for when it makes that thumping sound. i havent gotten any CELs yet. anyone have any ideas?? help would really be appreciated!!!
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Old 03-11-2007, 10:55 PM   #2
Humboldt wagon
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Do you have engine management?
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Old 03-11-2007, 11:06 PM   #3
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You might have installed them incorrectly and have an exhaust leak. Make sure you used the correct gaskets in the correct places, and that your bolts are tightened down.
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Old 03-11-2007, 11:07 PM   #4
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While I'm not going to bash the engine management idea, I think his problems sound worse than a lack of engine management. I'd guess he has a major leak going on there. Did you reuse the gaskets? Did you torque everything to spec? Do you have a BOV or CAI?
Also, after market downpipe makes the turbo spool sound very audible, even when using a catted downpipe. Is it a quiet whine or is it very loud inside and outside of the car?
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Old 03-11-2007, 11:24 PM   #5
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Not enough info. What does boost do, exactly? You mentioned a problem at 4000rpm, what is happening with boost before and after that point? Does it spike to higher levels than before? Does it fluctuate?

As someone already said, you will definitely hear the turbo more, but the shuddering/thumping/rattling is not normal. Did you use new gaskets? What torques did you use on the UP and DP bolts?
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Old 03-12-2007, 07:59 AM   #6
adWRXi
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i remember putting all of the bolts back, but i didnt use a torque wrench. i tightened them all by feeling to about how they were before. all of the gaskets are new. i had to make my own temporary gastket for between the dp and catback. its a 1 inch thick aluminum gasket lol. but there isnt a problem in that area. the boost gauge reads fine.. normal driving is also fine.. it was just as it was before i put these things on the car. everything else is completely stock. when i punch the gas the turbo kicks in at around 2200 rpm and its "turboing" up to about 4000 rpm. then it suddenly dramatically slow down and accelerates very slowly. ..as if there was no back pressure at all. and yes turbo spool can be heard inside and outside the car with windows up and windows down. it sounds like a semi truck really. well actually, ive heard a big fat obnoxious turbo in person once in my life, but im pretty sure its the turbo making that spool.
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Old 03-12-2007, 08:08 AM   #7
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With the Invidia dp, did you secure it to the transmission where the stock was? Perhaps under load the dp is shifting around and making a racket of noise.
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Old 03-12-2007, 09:32 AM   #8
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Quote:
Originally Posted by adWRXi View Post
i remember putting all of the bolts back, but i didnt use a torque wrench. i tightened them all by feeling to about how they were before. all of the gaskets are new. i had to make my own temporary gastket for between the dp and catback. its a 1 inch thick aluminum gasket lol. but there isnt a problem in that area. the boost gauge reads fine.. normal driving is also fine.. it was just as it was before i put these things on the car. everything else is completely stock. when i punch the gas the turbo kicks in at around 2200 rpm and its "turboing" up to about 4000 rpm. then it suddenly dramatically slow down and accelerates very slowly. ..as if there was no back pressure at all. and yes turbo spool can be heard inside and outside the car with windows up and windows down. it sounds like a semi truck really. well actually, ive heard a big fat obnoxious turbo in person once in my life, but im pretty sure its the turbo making that spool.
And you wonder why you have problems? Take it all apart and redo it the Right way with the right parts.
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Old 03-12-2007, 10:26 AM   #9
adWRXi
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i checked again this morning and i smell exhaust coming from near the up pipe area. this is an obvious leak am i correct? but i still dont see where this rattling sound could be coming from because the dp is secure. and the thick aluminum gasket is neccessary because there is over a 1 inch gap between the dp and catback.. ..until i find a proper gasket. and could any of this even cause the turbo to die out that soon??
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Old 03-12-2007, 04:08 PM   #10
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Sounds like one of two things to me.
1) Leak in the up/pipe.
2) Engine knock and pulled timing by the ECU.

Do you have some form of EM?
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Old 03-12-2007, 04:44 PM   #11
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^^Yea, I think he's doing both.

If you hear a loud screaming coming from the engine bay, most likely you have a leaking Uppipe.

Also, your car will pull timing for a while to compensate for the loss in backpressure and will run sometimes worse than stock IF you don't get the proper EM with it. I highly suggest getting EM ASAP, especially because you have an '04.

Also, try resetting your ECU, it may help...
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Old 03-12-2007, 04:50 PM   #12
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you tightened them all by feeling about how they were before? thats the lamest thing ive ever heard. you will be able to feel the exhaust leak with your hand, obviously smelling exhaust in the engine bay is not normal. please answer us as to whether you have engine management. you NEED it with your mods on an 04 wrx without question. unless you enjoy buying new motors
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Old 03-12-2007, 04:57 PM   #13
02WHITEDUB
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Get EM!
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Old 03-12-2007, 06:30 PM   #14
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dude, it's your uppipe. fix the leak and reset your ecu and you will be fine. you don't need em right away, but would be a good idea soon. Your car will be fine till then.

Last edited by gingertooth; 03-12-2007 at 06:44 PM.
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Old 03-12-2007, 06:40 PM   #15
adWRXi
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im getting the xpt stage 2 in a month or so g2g to work thoo... bye
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Old 03-12-2007, 07:00 PM   #16
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do you need EM with just an uppipe?
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Old 03-12-2007, 07:02 PM   #17
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do you need EM with just an uppipe?
Nope.
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Old 03-14-2007, 02:32 PM   #18
adWRXi
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alright ive noticed that the slow wood sawing/thundering/rattling sound only happens when the boost gauge reads between the line below -0.3 and -0.6 ..when you first start the car after the car has completely cooled down such as the morning the needle on the boost gauge is within that range when idle. and it makes that sound unless the car has warmed up. this is the only time it makes that sound when the car is idle. when driving, when the needle is within that range it makes the sound too. im thinkin it has something to do with the wastegate? but i dont think it could be THAT loud and i dont think you should be able to feel it.. any ideas?
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Old 03-14-2007, 02:52 PM   #19
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Quote:
Originally Posted by adWRXi View Post
alright ive noticed that the slow wood sawing/thundering/rattling sound only happens when the boost gauge reads between the line below -0.3 and -0.6 ..when you first start the car after the car has completely cooled down such as the morning the needle on the boost gauge is within that range when idle. and it makes that sound unless the car has warmed up. this is the only time it makes that sound when the car is idle. when driving, when the needle is within that range it makes the sound too. im thinkin it has something to do with the wastegate? but i dont think it could be THAT loud and i dont think you should be able to feel it.. any ideas?
So it only happens when your car is cold? And makes a screaming noise, kind sounds like a banshee when building boost?(Let me know if I got that right)

Sounds like an up-pipe leak to me. If so, the noise you hear is the air rushing out of the leak and vibrating the gasket, and when the gasket gets warmed up it expands and seals the leak. Not to mention that your car probably isnt too thrilled running stg2 w/o EM. The hesitaton around 4k rpms may be detonation and pulled timing as a result of the fuel map changeover. It could also be your dp rubbing o something, but doesnt make sense to me

Just my $.02
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Old 03-14-2007, 02:55 PM   #20
marcymarc
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stuck WG arm? not opening or closing?
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Old 03-14-2007, 03:37 PM   #21
Cryogenicstudios
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I thought you didnt need EM with those components? Just a DP, Catback, and UP?

I would assume that youd have to reset the ECU after doing a mod because the engine has to adjust...but I never heard 04's needing EM for just those mods before.
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Old 03-14-2007, 03:50 PM   #22
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Quote:
Originally Posted by Cryogenicstudios View Post
I thought you didnt need EM with those components? Just a DP, Catback, and UP?
Have you ever been on this forum before? Do you smoke crack? It's good to see you also have an 04' that you know nothing about.
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Old 03-14-2007, 03:53 PM   #23
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Quote:
Originally Posted by Cryogenicstudios View Post
I thought you didnt need EM with those components? Just a DP, Catback, and UP?

I would assume that youd have to reset the ECU after doing a mod because the engine has to adjust...but I never heard 04's needing EM for just those mods before.
READ HERE:

http://forums.nasioc.com/forums/show...tonation+found

Ever hear of the Open/Closed Loop Fueling Delay on 04+ years?

Start searching so you don't let misinformation destroy your car if you are or will start modding.
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Old 03-14-2007, 03:58 PM   #24
Cryogenicstudios
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Quote:
Originally Posted by WRXG0N View Post
READ HERE:

http://forums.nasioc.com/forums/show...tonation+found

Ever hear of the Open/Closed Loop Fueling Delay on 04+ years?

Start searching so you don't let misinformation destroy your car if you are or will start modding.
I have been on clubwrx since i got the car, and never once seen an recommendation for EM with a DP and UP, which is why I thought that was odd. I havent modded the car at all, was simply doing research, this is to be honest the first time ive ever seen this receommendation. Thanks for the info.
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Old 03-14-2007, 04:01 PM   #25
Force
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Quote:
Originally Posted by Cryogenicstudios View Post
I have been on clubwrx since i got the car, and never once seen an recommendation for EM with a DP and UP, which is why I thought that was odd. I havent modded the car at all, was simply doing research, this is to be honest the first time ive ever seen this receommendation. Thanks for the info.

No problem. I'm glad you found out this issue today rather than any later.
It's a common problem on 04+ WRXs that becomes very serious when no EM is taken in consideration BEFORE adding the exhaust power mods.
There are plenty of threads on here explaining similar issues.
With an 04+, EM FIRST, TBE AFTER.
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