no boooost....
 

so I drove my car down to the exhaust shop to get my downpipe sorted out, which went very well, but I limped it there and didnt notice that I wasnt boosting. then on the way home, I tried to hit boost a little, nothing. pulls strong like it did stock to red line, no boost though. gets to 0 vac then sits there, wot.

Im going to take a look at everything tomorrow, looked like all the IC pipe was solid, the vac lines looked legit, and didnt feel like there was any unmetered air getting in, idle was also fine... I need to take a look at the wastegate arm I guess, but the vac line looked fine...

any ideas?

Your wastegate arm is not hooked to the flapper... only thing it could be, among dozens of other things.

I'd suspect an open wastegate.

Mark

Be thankful that the wg stuck open and not stuck closed.

How on earth did you drive anywhere under atmospheric pressure? Ewww

I bet he was listening to showtunes.

darn you stuck up boosted folk. I remember when I had a turbo car, ahh those were the days....three months ago.

Welcome back! How'd it feel to have the power of us lowlies?

CONSTANTLY! Im listening to cabaret right now.

Im wondering if it could be my wastegate mechanism all together.

Sounds like a boost leak.

nah i dont think so, if there was a boost leak that freaking bad while he is running an AFM (which he is) car wouldnt run. I second the wastegate. It may be disconnected, way too loose, or something. Or maybe the exhaust shop messed up the turbine wheel :eek:

just kidding, that would suck though.

Yes i get boost by 1800rpm on my 16g with 50% or better throttle your WG arm might be to long my newly installed and purchased 16g cam with a wG rod that was about 1 inch to long a little bending and all is good i would take the WG arm off the flapperand move it closed mark where it is with some white out and then install the WG arm and see where you are. You can bend and move the arm from there. I hope this helps.

AHH. So "EMBd" must mean "E-manage Blue-ed"! I saw "Autotune-d" in his sig and assumed he had a standalone.... I worked on a car that the disk on the internal wastegate had broken off and traveled through the exhaust, behaved like that. Does it take forever to get to 0 vacuum?

yeah my sig was too long soo :) but yeah emb/autotune. it doesnt seem like it takes too long to get to 0vac, but I'll have to give it a go tonight to tell for sure. honestly this was the first time I tried to reach boost, before the downpipe was fixed it was FAR too loud for my neighborhood to do some open downpipe buzz runs. so I'll have to shake it down some more.

maybe the wg arm is too long but I dont know... seems right to me. and seemed to work before as far as I know.

maybe my cotter pin on the WG broke... I havent checked that because it was under my heat shield, and that was hot hot hot. the flapper arm was ok when I assembled it... the disc was there... was being the operative word :)

well lets say its the wastegate mechanism where can I get a new one?

---
on the upside the turbo makes my car WAY quiet. its like a secret. used to sound like a uncorked motorcycle now slightly louder than a stock miata. so I had him make me up a stinger :bigtu:

Send me a picture, I might have something that will work.

picture of which parts? I have some pics in my gallery of most of the major components.

I think pat is referring to the wastegate mechanism.

I agree, it's a wastegate problem. Sounds like it's not even hooked up or is totally shot.

hey sid if you want some help looking at it i can cruise down.

these are basicly the only pics I have that shows the wastgate really

http://jazz.sdsc.edu/photo/pictures/...s_100_0369.JPG
http://jazz.sdsc.edu/photo/pictures/...s_DSCN2175.JPG
http://jazz.sdsc.edu/photo/pictures/...s_100_0373.JPG

Driftem if you want to come by tonight I'll be in the garage :)

I'll get there about 4ish so really anytime after that

hey dude when tonight?

http://jazz.sdsc.edu/photo/pictures/...s_100_0373.JPG

To me it looks like the wastegate is pushed open. Verify I'm not mistaken, if not, then cut that arm and reweld it shorter.


BTW....I love the custom shaped air filter ;)

That's a filthy engine bay...but who am I to talk with my non-turbo car?

yeah dude the waste gate looks like its already pushed opemn. hmmmmmm

well I agree it looks open but, here its in a similar position and the door is closed... I'll take a look tonight
http://jazz.sdsc.edu/photo/pictures/...s_DSCN2175.JPG

Your breather filter port isn't still plugged like in those pics is it? That's a good way to screw things up...although not related to your boost problem.

no that was just to remind me, its routed to the intake pre turbo now.

well the hood wouldnt close, then it started with the mama jokes

were is the wastegate line ran to? could it have a vac leak for that or not be hooked up right? or maybe you are boosting but its just your gauge? how high did you get your rpms?

oh also were you driving while reving it or just sitting there. i cant get into boost or atleast cant see it on the gauge sitting still gotta have a load on it.

it also could verry well be just your heat sheild is blocking the arm from movimg properly

all good points, the wastegate line is routed to the port on the compressor, the bov is plumb there as well, but I think its fine and hadnt blown off.

the gauge is a little sunpro pos but I certainly didnt feel any boost from idle to redline, uphill (up university->park->washington, we live near each other), or wot. the gauge is plumb inline with the autotune pressure switch, is it possible the pressure switch is backwards? just thought of that, I dont remember any markings on it but...

and I was going to check the heat shield but it was hot and I had to run a part back to the shop right away... thats on the list of suspects tonight. it also could be the cotter pin on the wastegate arm, maybe it broke?

well get it fixed and get you into boost.

A leak in the wastegate vacuum line would make it stick closed.... not open. I'm with braineak, your wastegate is open in that pic.

Agreed, mine would be open at that angle.

EDIT:Here's the best pic I have showing what mine looks like when closed.
Attachment 216990

It may not be open but if there is no preload on the flapper it will push open from exhaust gases pretty early. That can prevent you from reaching boost...

How long is the rod on the WGA?

The bracket holding the actuator to the housing looks bent. The circled part of the picture can't look like that naturally. Either during shipping or by mishandling, the actuator bracket has been bent and has actually moved the can closer to the CHRA and is holding the flapper open.

With a pair of pliers, grab the bracket and bent it back straight until the rod starts to be pulled out of the can when the flapper is fully closed.

ANYBODY ELSE WANT TO BACK ME UP ON THIS, OR AM I CRAZY?

I just held the 16g sitting on my office floor (you'd recognize it Sam ;) ) up to the monitor to compare. While the bend that Sam pointed out is normally there, the wastegate is most certainly beign held open; the rod is pughing the lever waay too far.

You may be right, however, it could also totally be bent like that stock. I've seen enough interesting bends in otherwise good wastegate actuator brackets that I did't ask about it ;)

The bend is fine. Both my 16g actuators look like that.

You want at least a mm of preload. If the rod just slipped over the post on the flapper without you needing to pull it a bit I'd say that that is very likely the problem.

When you hit 0 vac do you get ANY smoke?

ok well I got home at took a look at everything...
A. it was being held open, the bracket is bent because the guy tried that before modding the wastegate arm...
B. I spaced the wastegate so that it was closed
C. wastegate blew up when I pressure tested it.

conclusion need new wastegate YAY!

anyone have a 16g wastegate for sale cheap?

dude just bend your braket and rod no biggy what do you mean the WG blew up. did it explode what. Mine did the same shit and it was brand new abit of creative bending fixed it right up.

This doesn't sound like anything zip-ties can fix :td:

no the bend was "ok", I shimmed it closed at the mounts, but the actual wastegate blows air past the rod above like 1psi. Im sure the diaphragm is kaput. I dropped my turbo right after I pulled it a few months back, but when I pressure tested the the wastegate it was actuating fine, why I thought it was ok. Then I tested it again on driftem's suggestion and sure as sugar its blown out.

send me an adress and i can send you my other WG my email works so just use the link.

http://cgi.ebay.com/ebaymotors/TD05H...QQcmdZViewItem damn i didnt know they where so high my offer still stands it is the longer of my 2 wG's but it is the newer one as well what do ya say. Cant beat free shipping might take a few days though.

i hope you get boost here soon

True that/\

At least the problem is solved.

totally, tomorrow around 5 I expect to be boosting :)
tonight = date night so no car work... lol might sneak out of work early tomorrow just to work slow and double triple check everything again.

what i'm talking about:naughty:

hey sid let me know if you want me to come over and help you get boosting my wife is off today so i can come without baby so i can actually help out. lemme know dude we need to get you boosting.