1G I can't get boost past like 12psi

[SleepingTsi94]

Well first off all I can't get boost past like 12psi. I have a greddy ebc which one line hooks into the top of my evolution wastegate which is 35mm. and the other to the turbo compressor wheel. No matter how high I turn the boost up it won't go past the 12psi. I had a leak coming from the pcv valve which I replaced with a oem one. So now I d/k where to look. Also with my 650cc injectors I can feel the tops and 3 out the 4 I can feel pulsating. How can I tell if its weak?
Help me figure this out. Id have to say with the way im running now I'm no faster than I was stock. Also running my external wastegate off the 02 housing. With no return just dumps out. Running this is a t3/t4 turbonetics

 

[Gregory]

For your boost, you didn't mention what bov you had on. Normally the first gen's are good for more then 12psi, but I've heard the occasional story of a leaky one. How many miles on your turbo? Good luck

 

[SleepingTsi94]

Probley couple 1000. Running a greddy bov with 2.5 inch charge pipes and a jrc front mount.

 

[kenamond]

Have you done the normal tests: boost leaks, proper WGA function, proper EBC installation?

You have a logger? What do your logs look like?

I know *nothing* about EBCs, but you may want to double-check that it's hooked up correctly. If you have a MBC laying around, you could try it - then I could help more!

If you don't have any boost leaks, logs look good, and you're getting 12psi, then something's "talking" to the WGA, and I'd bet on the EBC as the problem.

 

[SleepingTsi94]

I have done boost leak test. checked over the ebc. If its wrong someone tell me. So now going to check for exhaust leaks. Or anything else that could cause it. And also maybe a way to test the injector?

 

[7"exhaust_tip]

Why dont you borrow a known good working mbc and see if that works. Maybe your ebc is faulty or something.

 

[GSXspeeddemon]

First, what spring do you have in your wastegate?

 

[luvmygst]

First, what spring do you have in your wastegate?

It would not matter if he had the 3.5psi spring if the EBC was working correctly. The controller blocks the signal to the w/g until the preset pressure.

 

[GSXspeeddemon]

he says he checked the ebc. So if he has a .08 spring (11-12 ish), and by passes the wategate and sees 12 psi or runs 1bar spring and sees 15psi it will confirm whether the problem is in the ebc.

 

[oldman]

Pull the boost reference line going to the wastegate and go for a test run, what you're looking for is out of control boost so pay attention to the boost gauge and let off the throttle accordingly, post back results.

 

[SleepingTsi94]

I ran with no vacuum line on the wastegate. I hit id say 10-11 psi at all times. So whats next to look for? Do I have my ebc hooked up wrong? Or what?

 

[oldman]

I ran with no vacuum line on the wastegate. I hit id say 10-11 psi at all times. So whats next to look for? Do I have my ebc hooked up wrong? Or what?

1. Exhaust leak before turbo, including an unsealed OR blowing open wastegate.

2. Boost leaks.

3. Dying turbo.

Is this Evolution wastegate brand new? Do you have a link to the instructions of the wastegate?

 

[SleepingTsi94]

My wastegate is on my o2 housing. Heres the instructions. http://www.turboneticsinc.com/downloads/installinstructions/Evolution_Wastegate.pdf

I know my manifold has some cracks. But other than that I didn't anyother boost leaks. Don't Think the turbo is dying because it only has like 3000 miles on it with no shaft play and spins freely.

 

[oldman]

Did you buy the wastegate brand new and have possession of the entire kit?

 

[SleepingTsi94]

Yes bought the kit brand new. It was for my honda when I had it. Took the turbo wastegate and bov and sold the rest. All was new when bought

 

[oldman]

Which spring do you have installed? Refer to step 6 of the instructions.

 

[SleepingTsi94]

I have the 9psi spring installed. The red

 

[oldman]

This is what I think could be going on.

1. For sure, you didn't hook up the vacuum lines correctly. When using a EBC, you are suppose to use both top and side fittings, not just the top. Add a T to the line from the compressor before EBC and use the extra fitting for the side port. This however has nothing to do with the problem at hand.

2. I honestly don't think you have the 9psi spring inside, that or the wastegate is not adjusted properly. According to step 5 of the instructions, you can adjust the spring pressure by adding or removing shims. I suspect either you have the 5psi spring OR not enough shims OR both, resulting in the wastegate being blown open by exhaust pressure. Open the top of the wastegate and double check everything as if you just bought the wastegate.

3. Your wastegate valve is not completely sealed, remove it from the O2 housing and make sure the valve is fully extended and is seated tightly against the flange.

4. your manifold crack is larger than you think it is.

5. There are more boost leaks waiting to be discovered.

6. Any combinations of 1-5.

This is as far as I can take you without physically being there, the rest is up to you. Good luck.

 

[SleepingTsi94]

Thanks for the input. Just bought a 2g mani to put on and will go over everything you listed and report back tomorrow with the results.

 

[SleepingTsi94]

This is what I think could be going on.

1. For sure, you didn't hook up the vacuum lines correctly. When using a EBC, you are suppose to use both top and side fittings, not just the top. Add a T to the line from the compressor before EBC and use the extra fitting for the side port. This however has nothing to do with the problem at hand.

Well after looking over both the greddy profec and wastegate instructions. And took the one from the compressor and T-d it off into the top port and ran the other line from the ebc to the side port. Didn't Help at all. I have my pressure one that run from into the car to the vacuum line on my afpr that is tied in with my boost gauge.

2. I honestly don't think you have the 9psi spring inside, that or the wastegate is not adjusted properly. According to step 5 of the instructions, you can adjust the spring pressure by adding or removing shims. I suspect either you have the 5psi spring OR not enough shims OR both, resulting in the wastegate being blown open by exhaust pressure. Open the top of the wastegate and double check everything as if you just bought the wastegate.

I have a 9 psi spring in there. The red one with 1 shim. Which is mounted on top like the picture.

3. Your wastegate valve is not completely sealed, remove it from the O2 housing and make sure the valve is fully extended and is seated tightly against the flange.

Checked this out all seemed to be fine with no leaks.

4. your manifold crack is larger than you think it is.

Replaced this with a uncracked 2g manifold.

5. There are more boost leaks waiting to be discovered.

Checked for boost leaks. Didn't find anything. Used soap and water w/ air compressor.

6. Any combinations of 1-5.

This is as far as I can take you without physically being there, the rest is up to you. Good luck.

After doing all I found some exhaust leaks on my dp that I fixed. Checked all gaskets. Then came the test drive. After went out there was nothing. Was like I never did anything to it. I turned the power off to the ebc and ran just to the wastegate where I hit like 12-13 psi. So I'm starting to think either I have a bunk ebc or the vacuum lines I have hooked up are wrong.

 

[oldman]

Your EBC nor the way the vacuum lines are routed have nothing to do with the problem at hand because when you remove all lines to the wastegate, you're suppose to get infinite boost and you didn't so the problem is eithe boost leaks, exhaust leaks, wastegate or turbo, it can't be anything else. Did you try adding shims? Test run again without any vacuum lines connected to either top or side port.

Also, you have your vacuum line reversed, see this TIAL instruction so you'll understand.

http://www.tialsport.com/documents/w3_tial_wginstall.pdf

 

[SleepingTsi94]

Ok I understand the vacuum lines now. I d/k why the turbo would be bad. It boosted just fine. It has not problem what so ever. Will check again for boost leaks. Maybe I missed some exhaust? Why would I get infinite boost with a external? Wouldn't it only have to get to the pressure needed to push that spring?

 

[oldman]

Ok I understand the vacuum lines now. I d/k why the turbo would be bad. It boosted just fine. It has not problem what so ever. Will check again for boost leaks. Maybe I missed some exhaust? Y would I get infinite boost with a external? Wouldn't it only have to get to the pressure needed to push that spring?

Only if you have vacuum lines connected to it, without and reference lines, the wastegate will never open, at least not until exhaust pressure is great enough to physically push the wastegate open just like an internal wastegate. As an example, a TIAL with let's say 14psi spring and no vacuum line connected will not open until about 31 psi, this is why I asked you to test run without any vacuum lines right from the start to see if the problem was your EBC or hardware related as in leaks, wastegate or turbo.

Pull the boost reference line going to the wastegate and go for a test run, what you're looking for is out of control boost so pay attention to the boost gauge and let off the throttle accordingly, post back results.

 

[SleepingTsi94]

Ok will check it out tomarrow and go from there. And start all over again. Thanks

 

[SleepingTsi94]

Alright just did another boost leak test. Found a leak at the tb cable? Would that be a big enough leak to stop me from boosting high? Also I just bought a new pcv valve oem and have it hooked up and It pushing some air out of the side port on the vavle cover. Could these be the leaks or is that normal for the pcv?

Edit: I just got done putting 4 more shims in. Same results. Nothing past like 11. I did find a exhaust bolt by power steering loose that my friend said he got tight. So fix that exhaust leak. Till then let here what else. Becoming a pita.