Have a d16y8 fully built the other day bibtook off and heard a small pop. Boosted thru a couple of gears and all seemed fine. But now I cant build any boost up.... ive checked out the turbo manifold for cracks and ive taken the air filter off the turbo and checked out the turbine. It still clean and no wobble or shaft play.....I am curious if anyone has ideas... is it my cheap *** wastegate or bov doing it. How can I tell??

 

Btw it only has 1100 miles on the whole setup. Im just confused. Ive checked intercooler piping and couplers. Idk what it is and im new to turbo applications

 

Check all of your vacuum lines, as well as any vacuum block you might be using. Pressure test your wastegate and BOV.

 

I can just remove my wastegate and test it right? It wont mess with my tune at all or anything.... and blow off valve?

 

why do you want to drive without the wastegate? you wont build any boost.

sounds like intercooler piping if you heard a small pop then no boost. i would double and triple check all of your connections.

 

That was a dumb question..... lol wasnt thinking. But I am definitely going to go over every connection... I dont really have a wide range of tools around anymore but is therea way to tell if your wg and bov are good without a pressure test?

 

If he unhooks the wastegate signal line then in theory he will make as much pressure as the turbo can make. not a smart idea for obvious reasons but if you're checking or leaks or a failed component then pull the signal line, get into 4th as gently as possible and give light throttle inputs. you should build boost fairly quick, keep an eye on your boost gauge... if you build as much boost as you have been running normally then you either have a wastegate or boost controller issue.

normally a small pop is the sound of a pipe blowing out of a coupler or a coupler failing.

you need to make a home depot charge pipe tester to check for any leaks or torn couplers. you can google how to make one cheap.

put water in a spray bottle with some dish soap in it, spray every connection liberally. then attach the tester to the turbo inlet or hot side pipe and the plug into the throttle body coupler (you can't have the piping hooked up to the tb) then pressurize the system.

any leaks will show up as a bunch of bubbles.

 

From what he wrote, I figured he wanted to remove the wastegate all together

 

Considering there was a loud popping noise, it's a pretty safe assumption that either a vacuum line, boost line, or charge piping coupler came off.

 

what he said...had it happen on several occations...part of that boosted life...lol

paid $3 per pipe to have everything bead rolled and that fixed the problem, make sure all vacuum lines have zipties or clamps or they will pop off

also make a boost leak tester:

go to home depot/menards/lowes to the pvc pipe section.

- find a pvc end cap the same size(outside diameter) as your turbo inlet(intake pipe)

- pick up a air compressor fitting

- pick up some jbweld

drill a hole and thread the fitting into the top of the endcap, jbweld it in and let it dry for a day.

go out and use your intake pipe coupler and fit the endcap over the turbo inlet. hook up you air hose and fill the piping with 20lbs and turn off the air compressor. listen for leaks

 

Can I start my car and see if the turbo is spoolong without the intake piping hooked up? Im testing for leaks here shortly. Just getting every thing ready now

 

Just do the easy **** first. One step at a time.

 

Ok. So my bov gasket was a little leaky. I fixed that but now still no boost..... could it be that my cheap *** manual boost controller is messed up or what is going on?! Im bout to go crazy and push this thing off a cliff

 

Do the boost leak check if not start the car and block off the turbo inlet if the car doesn't bog or shut off from lack off air then U have a leak ... Another thing u could do is bypass the boost controller to see if that is the problem (wastegate straight to the charge pipe) if that don't work u may have a bad wastegate

 

if you had a bad boost controller, you still wouldnt be able to boost under your wastegate pressure.

check ALL of your intercooler piping again. maybe your clamps are tight, but one of the couplers tore.

is your wastegate recirculating or do you have a dump tube? can you hear any exhaust leaks pre turbo or at the wastegate exit? you might have a faulty wastegate.

if you get on it, the car doesnt build any boost at all? throughout the rpm range? i had a similar issue that was caused by a faulty wastegate. the wastegate was leaking so i wasnt building boost, then in the upper rpm;s it would.

 

I did the boost leak test and there are no leaks anymore. But still no boost throughout the rpm range.

 

jack your car up and pull on the intercooler piping going to the turbo, the piping going to the inlet of the intercooler, the piping going out off the intercooler and the piping on the intake manifold

You probably have a lose coupler on the pipe off the turbo

Also check to make sure your blow off valve isn't opening when you manually rev it(hand on throttle cable). The valve will move some when you let off of it.

 

Also I do know that my wastegate and bov as well as the boost controller are cheap as hell..... ebay stuff. But the bov still blew off after it pressurized during the boost leak test...

 

You get what you paid for...

 

So is that saying its probably a wastegate issue??

 

It could be anything. Inspect everything from top to bottom, front to back. I think that's what everyone has been telling you. Stop trying to glom onto one specific part as the answer.

 

This is one of those "we can't tell you, you need to figure it out" situations. You heard a pop. That means something broke under pressure. It might be a vacuum line. It might be a boost line. It might be a coupler. It might be the diaphragm in one of your cheap, shitty parts. It might be anything. You need to get in there, get your hands dirty, and figure out what it is.

 

you still didnt answer my question.

do you hear any exhaust leaks from the wastegate?

fix a plastic bag over your bov, rev the motor. the bag should not fill up with air if your bov is sealing correctly, if it does, yuou have a leaky/faulty bov. you say your bov "blew off". what psi did it do this?

 

Ive check for vacuum leaks and tested the intercooler piping for boost leaks. Both seem ok to me. I put probably 15 psi in my piping untill bov went off... I also fixed a very small exhaust leak from the wastegate gasket. One question I have... was reading last night and a couple of people say all your boost/vacuum lines should come off of the manifold. Well the way this is hooked up right now my manual boost controller has the line going to the wastegate and one to the turbo... then my bov is connected to the manifold. I guess I dont care how its hooked for now bcuz it did work before. Im almost positive im just blind and missing a line somewhere or something. Its frustrating the hell out of me. And as for the people telling me I just need to get my hands dirty and blah blah. I have been. But when I dont know exactly or understand everything and how it works exactly. It makes things pretty hard. Ive built this thing over 2 years of research and hard work and to hear people ******* is even more frustrating. I just want this piece to run again. Maybe then at least I could get a 1/4 of the mone I have in it back out.....

 

How in Hades can you have built and researched over a two year span and not understand everything people are telling you or know how it works exactly (WTF?)? The hardware part of a turbo install has got to be the most simple part of teh whole system. If your key components are junked **** then everything else might be as well. Couplers for instance. Do you have those plastic wannabee no-ply couplers? I've seen these split right along the clamps and you not be able to see it as it caused a boost leak.