2006 EVO IX.....still having boost issues!!!
Well since I'm going to have a Defi boost gauge installed I'm going to have my tuner check it out so he can make it run normal again.
do you have the clips to hold the intake snorkel on to the radiator sub frame? If you are missing those it will cause the snorkel to pull up against the hood and cut off airflow in the higher rpm's thus taking boost all the way down to 10psi
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Joined: Nov 2006
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From: Columbia, SC
I have the same problem?!?!?!
Check it out. I have an 06 RS with K&N, Turbo XS 3" DP and Megan Catback.. that's it! I put on a Slow Boy Racing MBC and after a few weeks I lost boost?? It would max out 1.5 then drop to 1.0 bar!! I put the Stock EBC and I still have this problem. The weird thing is that at 3500 rpm in 5th it will hit 1.3 bar.... normal boost. Someone told me I need an upgraded spring for the stock wastegate actuator or just get the Forge WGA. I have yet to do a boost leak. That is my next option. Has anyone heard about a worn put stock WGA??? I know how you feel because our cars are stock! We obviously need some help.
Check it out. I have an 06 RS with K&N, Turbo XS 3" DP and Megan Catback.. that's it! I put on a Slow Boy Racing MBC and after a few weeks I lost boost?? It would max out 1.5 then drop to 1.0 bar!! I put the Stock EBC and I still have this problem. The weird thing is that at 3500 rpm in 5th it will hit 1.3 bar.... normal boost. Someone told me I need an upgraded spring for the stock wastegate actuator or just get the Forge WGA. I have yet to do a boost leak. That is my next option. Has anyone heard about a worn put stock WGA??? I know how you feel because our cars are stock! We obviously need some help.
you didn't answer my question, therefore I can not help you any further
I recently had my tranny, LSD, TC, and some other things done for the 30k service. My car runs good, the tranny shifts good again with the new oil and everything is fine except for one thing. My boost is down a lot. I hit peak boost of 14-15 psi @ 3500 RPM and it starts to tapper to 10 psi @ 4500-5000 RPM. Since I bought my car, nearly 2 years ago, my boost has been going down. I had a friend of mine did a pressure leak test and he said everything is fine, no leaks to speak of.
The car feels like it's making less power to me. I had another friend(evo 8 owner) drive it and he said it's making power. So I'm a little confused now. He's telling me to toss away my current boost gauge and get something that reads more accurate. A couple of local owners told me to get a turbo smart ebc cause it doubles as a boost gauge and reads very accurate. My only mods are a K&N drop in filter and a self modified stock air box cover(I cut a hole on the side). Any idea's on what I should do? Can you guys reccomend a VERY accurate boost gauge for me? What are my options on this boost issue? Thanks in advance for the help!
The car feels like it's making less power to me. I had another friend(evo 8 owner) drive it and he said it's making power. So I'm a little confused now. He's telling me to toss away my current boost gauge and get something that reads more accurate. A couple of local owners told me to get a turbo smart ebc cause it doubles as a boost gauge and reads very accurate. My only mods are a K&N drop in filter and a self modified stock air box cover(I cut a hole on the side). Any idea's on what I should do? Can you guys reccomend a VERY accurate boost gauge for me? What are my options on this boost issue? Thanks in advance for the help!
Boost is very simple. It's like a balloon. It either blows up or it doesn't. If it doesn't there are a few reasons why. There is a leak, or whowever is inflating it can't do it.
1. Check for boost leaks. Don't depend on your friend. Go around and tighten every clamp you can find on the intercooler pipes etc. Make sure to get the ones off the intercooler end-tanks.
2. Boost control solenoid. If it isn't working properly it could be bleeding air to the wastegate and opening it at the wront time.
3. Wastegate (unlikely cause it'll fail the other way)
4. Compressor wheel (since you cut your airbox open, i'm wondering if anything got inside and fuxored the wheel)
Last edited by SophieSleeps; May 11, 2007 at 06:20 AM.
Evolving Member
Joined: Aug 2004
Posts: 260
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From: Jersey
You do know that the autometer gauge is about as accurate as those fake chinese rolex watches you can buy on the corner of 5th Ave for $10 right?
Find someone with a tactrix cable and the appropriate software (easy evo, whatever its called) and check the boost that way. Go to a shop that knows evo's and let them test it.
Personally I'm betting that your crap-meter... I mean autometer guage is fubar.
Also guys, his airbox hole is BEFORE the Maf therefore is shouldn't really cause too many issues. Maf issues usually occur because of a leak AFTER the maf that lets in un-metered air.
Though I would close it up, you basically letting all the cool outside air your snorkle lets in go right out the other side with that setup, so it wouldn't surprise me if your intake temps actually increased. Which would result in a power drop. Cold air will get you more power than hot air with an extra pound of boost.
Find someone with a tactrix cable and the appropriate software (easy evo, whatever its called) and check the boost that way. Go to a shop that knows evo's and let them test it.
Personally I'm betting that your crap-meter... I mean autometer guage is fubar.
Also guys, his airbox hole is BEFORE the Maf therefore is shouldn't really cause too many issues. Maf issues usually occur because of a leak AFTER the maf that lets in un-metered air.
Though I would close it up, you basically letting all the cool outside air your snorkle lets in go right out the other side with that setup, so it wouldn't surprise me if your intake temps actually increased. Which would result in a power drop. Cold air will get you more power than hot air with an extra pound of boost.
You do know that the autometer gauge is about as accurate as those fake chinese rolex watches you can buy on the corner of 5th Ave for $10 right?
Find someone with a tactrix cable and the appropriate software (easy evo, whatever its called) and check the boost that way. Go to a shop that knows evo's and let them test it.
Personally I'm betting that your crap-meter... I mean autometer guage is fubar.
Also guys, his airbox hole is BEFORE the Maf therefore is shouldn't really cause too many issues. Maf issues usually occur because of a leak AFTER the maf that lets in un-metered air.
Though I would close it up, you basically letting all the cool outside air your snorkle lets in go right out the other side with that setup, so it wouldn't surprise me if your intake temps actually increased. Which would result in a power drop. Cold air will get you more power than hot air with an extra pound of boost.
Find someone with a tactrix cable and the appropriate software (easy evo, whatever its called) and check the boost that way. Go to a shop that knows evo's and let them test it.
Personally I'm betting that your crap-meter... I mean autometer guage is fubar.
Also guys, his airbox hole is BEFORE the Maf therefore is shouldn't really cause too many issues. Maf issues usually occur because of a leak AFTER the maf that lets in un-metered air.
Though I would close it up, you basically letting all the cool outside air your snorkle lets in go right out the other side with that setup, so it wouldn't surprise me if your intake temps actually increased. Which would result in a power drop. Cold air will get you more power than hot air with an extra pound of boost.
boost gauges are easy to make and all are pretty accurate. Even the cheapy ones. If you're making 12psi on the gauge you won't be so far off as to actually be making 20.
As far as a tactrix cable goes, you can't log boost with them.
If you make a hole on the intake side, pre-compressor it won't make that much of a difference in intake temps. That's why you have an intercooler. It's already heated up dramatically by the turbine.
Well I'm pretty sure my air box is not the problem, I tested a regular air box with no hole and it still boosts low. The turbo cannot be damaged cause the hole is on the side of the lid so I still have the K$N filter to filter any dust, dirt, or other objects. When I got my gauge I knew it was off, it sits almost at -1 when the car is off so I know it's about 3-4 psi off. When I would hit 16-18 psi I knew I was really around 19-21 psi but over the last year my boost has been dropping off.
I already ordered a Defi boost gauge so I hope that will be accurate. The first thing I'm going to do is take it to my local dealer and try to have them fix it under warrenty. If the dealership can't fix it than I'm going to send my car over to Tuning Technologies and have them take a look. Thanks everybody for the help! I hope I can get my evo running like normal again......
I already ordered a Defi boost gauge so I hope that will be accurate. The first thing I'm going to do is take it to my local dealer and try to have them fix it under warrenty. If the dealership can't fix it than I'm going to send my car over to Tuning Technologies and have them take a look. Thanks everybody for the help! I hope I can get my evo running like normal again......
I just checked the snorkel this morning and everything is fine.
Well I'm pretty sure my air box is not the problem, I tested a regular air box with no hole and it still boosts low. The turbo cannot be damaged cause the hole is on the side of the lid so I still have the K$N filter to filter any dust, dirt, or other objects. When I got my gauge I knew it was off, it sits almost at -1 when the car is off so I know it's about 3-4 psi off. When I would hit 16-18 psi I knew I was really around 19-21 psi but over the last year my boost has been dropping off.
I already ordered a Defi boost gauge so I hope that will be accurate. The first thing I'm going to do is take it to my local dealer and try to have them fix it under warrenty. If the dealership can't fix it than I'm going to send my car over to Tuning Technologies and have them take a look. Thanks everybody for the help! I hope I can get my evo running like normal again......
I already ordered a Defi boost gauge so I hope that will be accurate. The first thing I'm going to do is take it to my local dealer and try to have them fix it under warrenty. If the dealership can't fix it than I'm going to send my car over to Tuning Technologies and have them take a look. Thanks everybody for the help! I hope I can get my evo running like normal again......
2. Your boost gauge sits at -1 what? Most boost gauges are psi in positive pressure and inches of mercury in vacuum.
3. Ordering a Defi boost gauge won't solve any problems. Defi doesn't make any better gauges than anyone else. They just charge more.
4. You have a boost leak.
1. You don't know your turbo isn't the problem unless you checked it.
2. Your boost gauge sits at -1 what? Most boost gauges are psi in positive pressure and inches of mercury in vacuum.
3. Ordering a Defi boost gauge won't solve any problems. Defi doesn't make any better gauges than anyone else. They just charge more.
4. You have a boost leak.
2. Your boost gauge sits at -1 what? Most boost gauges are psi in positive pressure and inches of mercury in vacuum.
3. Ordering a Defi boost gauge won't solve any problems. Defi doesn't make any better gauges than anyone else. They just charge more.
4. You have a boost leak.
1. You don't know your turbo isn't the problem unless you checked it.
2. Your boost gauge sits at -1 what? Most boost gauges are psi in positive pressure and inches of mercury in vacuum.
3. Ordering a Defi boost gauge won't solve any problems. Defi doesn't make any better gauges than anyone else. They just charge more.
4. You have a boost leak.
2. Your boost gauge sits at -1 what? Most boost gauges are psi in positive pressure and inches of mercury in vacuum.
3. Ordering a Defi boost gauge won't solve any problems. Defi doesn't make any better gauges than anyone else. They just charge more.
4. You have a boost leak.
2. ooops my mistake, it sits at -1 in vacuum when the car is off.
3. I know it won't solve my problems but I don't want that POS autometer gauge in my car for another second.
4. ok so how do I fix it? I checked the pipe conecting to the throttle boddy, the bov and it's pipe, turbo inlet/intake, checked both sides of the endtanks, LICP, UICP and everything is screwed in nice and tight. What should I do? take it to the dealer?