turbo complications

[420a_BOOSTED]

i just put a garrett super 60 on my 420a and i have a couple problems with it.. its idoling really rough and i have to keep my foot on the gas for it running and when im driving a bunch of smoke comes out the exhaust the boost gauge doesnt go to pressure it jus goes from 10 vac to 20 vac its just a really a wierd and any information of fixing this problem would help out alot

 

[The_EE]

Do you have any of the standard upgrades done yet? injectors, Regulator, Fuel pump, Fuel Managment?

 

[cs82685]

a complete mod list is a good start for help, but my money is on an exhaust leak, boost leak, vaccum leak, or a combination of the three.

 

[DSMcrazy3]

Sounds like you have an exhaust leak which is causing incorrect readings from the front o2 sensor. Is your downpipe connected or is it open right now? Aside from that, does your boost gauge read 10 vac - 20 vac at idle, or when you get on it? If at idle, you've got a vacuum leak. It's a common problem, especially when boosting the 420a since so many vacuum lines are tampered with. You probably just left one unhooked.

As stated before, give us a list of your mods and we can help you more thoroughly.

 

[420a_BOOSTED]

street source manifold garett super 60 turbo turbo xs bov 2 1/2 down pipe to straight pipe then 3 all the way back walbro 255 high pressure obx fmu missing link fmic.. the smoking was told to me that since the turbo is pushing more air in that its pushing oil past my cranks and im burning it... at an idol its around 10 vac then when i get on it, it goes to 20 vac im pretty sure i can fix the exhaust leaks but that smoke is really worrying me and how it idols i would take pictues of it so show you but i dont know how to put them on the forum any responses would be greatly appreciated

 

[4UH8ERS]

the smoking was told to me that since the turbo is pushing more air in that its pushing oil past my cranks and im burning it...

Who told you this? You only have one crankshaft first of all, and oil your starts under your crank in the oil pan then is of course siphoned up through the oil pump and into the head ect. You might have a little excess oil around your cylinder walls and stuff but I don't think that would be your problem. Crank scraper is a good idea anyway though.

you probably have an exhaust leak or boost leak like previously stated. Have you even reached boost yet? is the turbo spooling, was it a new or used turbo?

btw: idols are something you worship. your car idles.

keep us updated goodluck.

 

[420a_BOOSTED]

everything i have on there was brand new.. sorry i cant spell.. my neighbor told me something of the sort the turbo spooled my blow off went off but my gauge didnt read any pressure but it is alot of smoke coming out i cant see whats behind me when i drove it so i just turned it off and pushed it home. i know i got some exhaust leak somewhere but would that really make it act like that?

 

[4UH8ERS]

everything i have on there was brand new.. sorry i cant spell.. my neighbor told me something of the sort the turbo spooled my blow off went off but my gauge didnt read any pressure but it is alot of smoke coming out i cant see whats behind me when i drove it so i just turned it off and pushed it home. i know i got some exhaust leak somewhere but would that really make it act like that?

First thing you should do is fix any leaks you may have. Check your oil for any coolant mixing in, could be a headgasket, although i doubt it if you have not even drove it since the turbo installation.

out of curiosity think you could post 2 pics of your engine bay, one of the front facing the exhaust manifold and one of the back by the intake manifold?

 

[DSMcrazy3]

When you had a cold air intake, or stock intake setup there was a line that went from the pipe right by the throttle body, to the valve cover. Did you re-attatch a line there when you installed your intercooler pipes?

 

[Talon ESI-T]

If you need help I am located in Plainfield IL.

First off, exhaust leak shouldnt cause this. If you have an exhaust leak large enough to keep from building boost like i did way back when i first built my car, It WONT affect the fuel mixture enough to cause problems. I have a star manifold with a casting flaw that ended up being a hole large enough to cause no boost.

What I want to know is exactly what did you do to your car when you installed the turbo. Was it turbo already? What is the Vac reading at idle?

Pull the turbo off and look for traces of oil in the compressor housign or turbine housing.


I am off work Thursday. Thursday night i leave for MO to pick up a new hood and i wont be back till friday evening then its back to work. I work for Com Ed so my time gets thin. If you want help you can stop by otherwise post up some info and we will figure it out. You might just be 420a turbo #3 in the chicagoland area.

Terry

 

[420a_BOOSTED]

well i fixed the idle i had a mad vac leak but before i fixed the vac leak it wa reading 10-11 at idle then when i got on it, it read 20 or so. I had a buddy come over and look at it and he said that the pcv valve might be leaking oil into the intake then its going in the motor. and he also said that the seal might be blown in the turbo but its a brand new garett super 60. i took off the ic pipes that go to the turbo and there is a little bit of oil in there. and if i run my car for a minute the smoke is almost unbeareable. its just a wierd thing and i dont have a cat its jus a straight pipe all the way back but that wouldnt be able to cause so much smoke. before this turbo i had a t25 on there and that had oil coming out of the o2 housing so its had to believe that i blew two turbos right away.

 

[420a_BOOSTED]

and yes i reattached the lines from the valve cover back to the ic piping.

 

[4UH8ERS]

and yes i reattached the lines from the valve cover back to the ic piping.

Well, you might want to just put a breather filter on the valve cover and not attach it to the intercooler piping with vacuum hose. oil can definateloy come through there and end up in the intercooler piping under boost applications, but if your getting smoke while idleing then im pretty sure thats not your problem.

 

[XMasta19]

and yes i reattached the lines from the valve cover back to the ic piping.

no no no

In doing so, you're putting positive boost pressure back into the crankcase...thus eliminating any good your pcv (positive crankcase ventilation) valve would be doing. Once you go turbo, the pipe going into the throttle body is no longer your intake, but instead is pressurized. Your intake is now the compressor side of the turbo where you have your filter at. You SHOULD NOT have any line running from a nipple or what not on the intercooler piping to the valve cover breather. You should instead install a breather filter or oil catch can there, and cap off the nipple on the piping.

 

[XMasta19]

Even though the turbo is brand new, you should take off your downpipe and verify you have no oil coming from the turbine side. If you do, your return line is most likely kinked, not big enough, or not straight up and down thus causing the oil to make it's way past the seals. Check these things I've mentioned and let us know.

 

[DSMcrazy3]

Part if not all of the oil problem will be that line from the IC pipe to the valve cover, like Xmasta said that pipe is pressurized, and where the line connects on the valve cover is the inlet for the PCV system, air goes in there, then down into the crank case to blow any gasses out of the crank case and back through the motor. Once the pressurized air is down there it can cause oil to be blown up through the PCV back into the manifold.

 

[420a_BOOSTED]

i disconnected it and put a breather on the valve cover then plugged that hole and its still leaking oil in the exhaust and its leaking from the return and its black oil like dark black

 

[DSMcrazy3]

Leaking from the return line? I don't really understand that part..If there is oil in the exhaust part of the turbo you've got a bad seal. Is your return line the correct size? There was just another member who's return line was way too small, which caused the oil to back up in the turbo and squeeze passed the seals.

 

[420a_BOOSTED]

lets see.. if the seal is bad then would i have to rebuild the whole turbo? There is little shaft play on it and its brand new.. how big should the return line be then? mine is pretty big i would have to say maybe a half inch..

 

[VelocitàPaola]

The return line should be fine then. 1/2" (~8-AN) is about the minimum, 5/8" (10-AN) is ideal.

A shot seal basically means a whole rebuild is required. There's no sense in only replacing one of those seals/gaskets while you have the turbo apart... The good news is, is that you can probably do it all yourself, provided you find the appropriate rebuild kit. As long as the fan blades didn't receive any trauma, you shouldn't need the turbo balanced or anything.

 

[92awddsm]

The return line should be fine then. 1/2" (~8-AN) is about the minimum, 5/8" (10-AN) is ideal.

A shot seal basically means a whole rebuild is required. There's no sense in only replacing one of those seals/gaskets while you have the turbo apart... The good news is, is that you can probably do it all yourself, provided you find the appropriate rebuild kit. As long as the fan blades didn't receive any trauma, you shouldn't need the turbo balanced or anything.

You dont need turbo balancing as long as you orient the shaft, compressor wheel, and nut as they were before pulled apart. The rotating assembly of a turbo is balanced as that, an assembly. Before disassembly, scribe a straight line on the end of the shaft, nut, and compressor wheel. Upon reassembly, make sure the line on the shaft and compressor wheel line up. Now, put red lock tite on the nut and tighten it. Try to get the line to match on the wheel, shaft, and nut. If it works out well, then there is no need to rebalance the turbo. If you dont do this, the balance will be off on the turbo and you will destroy the bearings in it in a matter of hrs-days.

 

[420a_BOOSTED]

well there is no hurt in trying to make my return line bigger. Im just trying to eliminate the other possibilities before i have to rebuild a brand new turbo. If that is the problem do you think that is came blown or with a bad seal?

 

[420a_BOOSTED]

and there actually is oil on the turbine side of it.

 

[andrewmitch]

Is there anyway to test if the turbo is functioning at 100% or not?

I have a 96 w/ 92k miles w/ original stock turbo. I just rebuilt the transmission but it seems like it lost a lot of thrust/kick. The turbo gauge cranks all the way up but not sure that means it is actually working or not.....Thank you!

 

[DSMcrazy3]

and there actually is oil on the turbine side of it.

Bad seal, need to rebuild or replace it.