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View Full Version : "loosing" Turbo! HELP!!



Marcelo
10-03-2005, 07:27 AM
Hi guys!! Recently i'm havin' problems with my turbo. Here whats happening...

Hit the gas and the turbo works... Stop for a red light or something, then hit the gas again and.... NO TURBO!! 4000 RPMS with no torque... the turbo suddenly stops working... Later on with no special reason it starts working again. Whats going on?? is my turbo Fu**ed up??[down]
Thanks!!


Marcelo [a4]

[az]

RedRocket
10-03-2005, 07:47 AM
Could be a problem with the electronics, maybe the plug to the boost controller is messed up?

What DV valve do you have? Perhaps it is sticking open? When you stop, it opens so that would make sence.

Marcelo
10-03-2005, 08:00 AM
I'm running all stock. My Dv valve is stock.

bitterchild
10-03-2005, 08:04 AM
wastegate problem, any cels?

Marcelo
10-03-2005, 08:11 AM
I have no idea.... I am not the person that you can call "expert". Im new with this mechanical stuff.

What is a wastegate?? Cells?? Do you know the wastegate part number??

MR VTEC
10-03-2005, 08:17 AM
cel = check egine light

Marcelo
10-03-2005, 08:22 AM
Ohh!! Ok. No, no lights. As far as the warnings are concerned everything is normal... ( if thats what you mean...)

beejohn
10-03-2005, 08:22 AM
yeah vag the car see if it is throwing any codes

Marcelo
10-03-2005, 08:33 AM
No vag-com...[:(]

alen
10-03-2005, 08:40 AM
what year and how many miles?

RedRocket
10-03-2005, 08:47 AM
How many miles on the B1tch? Is it new/old. I would take out the Diverter Valve and test it. If it sticks, it will cause that type of behavior.

Marcelo
10-03-2005, 09:00 AM
A4 1.8T 1996
146.166Km
90,622Miles

RedRocket
10-03-2005, 09:07 AM
Are you sure it's 96?????

96 don't come with 1.8T, at least in the US/Canada.

If it has that many miles on it, you need to change the Diverter valve.

Marcelo
10-03-2005, 09:12 AM
Yes I am. 96's came with turbo to Brazil.

b00st
10-03-2005, 09:35 AM
i would tend to lean towards wastegate problems, like bitter said.

BranCKY3
10-03-2005, 09:39 AM
Well before jumping to such a big conclusion as to having to replace the turbo due to wastegate problems, head over to the Audi dealership and buy the TT diverter valve. It's only $30 there and can't hurt to change. Really easy to change too.

RedRocket
10-03-2005, 11:19 AM
Originally posted by b00st
i would tend to lean towards wastegate problems, like bitter said.

Well, what could make you have zero boost.

1. Stuck open wastegate
2. Stuck open diverter valve.

What has Marcelo posted that could lean towards one or the other? I myself see nothing.

If the wastegate is sticking open/not sealing it would most likely be a problem with the actuator itself. These are sold seperatly.

Marcelo, do you often hear a fluttering metal sound from the turbo area, it should be a sound easy to replicate if to have the hood open and you pop the throttle open a few times.

You could buy a new valve or the TT valve and eliminate that as the issue by replacing it yourself. Either that or it's a 1/2 hours labour.

I don't know if it is ok to put a TT 225hp valve into a 1.8T non chipped.

RedRocket
10-03-2005, 11:20 AM
It could also be a flakey n75 valve, the valve that controls the waste-gate, or the wires to it could be shorting somehow.

Marcelo
10-03-2005, 11:25 AM
Alright!! Thanks Guys! I'll check it out...

DarkkstaR
10-03-2005, 11:26 AM
The TT valve is safe in a non-chipped car.

Marcelo
10-03-2005, 11:36 AM
Ohh really?? Is it better then my stock valve?? Will it give me more boost?

BranCKY3
10-03-2005, 11:51 AM
No it will hold boost better though, err more reliably.

RedRocket
10-03-2005, 12:06 PM
Originally posted by Marcelo
Ohh really?? Is it better then my stock valve?? Will it give me more boost?

hahahah lol, you're such a noobie! [:p]

When you get past your little problems here, look into getting a chip [up]

k0mpresd
10-03-2005, 12:09 PM
if you end up needing a wastegate let me know, i have a blown turbo w/ a good wastegate [up]

good luck fixing your problem..could be a couple things like others mentioned....dv, n75, wiring..

finding someone w/ a vag might should be first on your list of things to do

Marcelo
10-03-2005, 12:18 PM
Haha!! Yes I am!! I am a noobie!! I told you guys!! HE he!
Alright I'll let you know!
Thanks

duhvinci
10-03-2005, 01:10 PM
I actually have exactly the same issue (1998 TQM), here is what I've narrowed it down:

*First start in the morning - fine, 30 min driving to work/school
*Start after work (sits all day 8-16 hours) - fine
*If I stop at gas station, shut her off, restart = no turbo for 10-15 min thereafter
*Driving very slow in traffic (stop and go) for 15-20 min = no turbo for 10-15 min thereafter

DV in my car is Bailey motorsport... Looks like I too have to check n75 valve, wires and the waste gate...

Thanks,
D

bitterchild
10-03-2005, 02:08 PM
check your vacuum lines going to the wastegate actuator. sounds like a signal issue. where in va are you? maybe i can take a look

Marcelo
10-03-2005, 02:37 PM
--------------------------------------------------------------------------------
Originally posted by duhvinci

*First start in the morning - fine, 30 min driving to work/school
*Start after work (sits all day 8-16 hours) - fine
*If I stop at gas station, shut her off, restart = no turbo for 10-15 min thereafter
*Driving very slow in traffic (stop and go) for 15-20 min = no turbo for 10-15 min thereafter
--------------------------------------------------------------------------------

Bullseye!! Thats my problem!!!

Marcelo
10-03-2005, 02:54 PM
Hey duhvinci, let me know if you figure it out.
Alright?
Thanks

duhvinci
10-03-2005, 03:02 PM
Bitterchild - thanks for the help, Im a little on the far side from you, Locust Grove (about 25 miles west of Frediricksburg)

Marcelo - ok, so Im not the only one!

Im new to this car, bought her little over a month ago from a girl at work, had busted TB, so the head went south. 2 weeks ago we've completely put the car back in one piece, head is beautifully assembled, all new hardware, all new tensioners, all gaskets, bolts, blah blah blah

Just trying to work out all the little corks out of her before getting into larger turbo and chip and all the other related goodies (so yes, she is a virgin right now)...

I will check everything this coming Sunday, I do have new OEM spare DV, and bulk various vacuum hoses. Will report on what I find

Thanks!
D

bitterchild
10-03-2005, 07:37 PM
hit me up if you need a hand. we can meet around the wilson/legion if you want.

duhvinci
10-05-2005, 12:24 PM
Thanks man, really appreciate the offer! I think she's good now (holding my breath)...

I got out of school early today, changed oil , checked all hoses and lines, everything looked fine. So I swapped Bailey DV with brand new TT 225hp DV. The car feels lighter on the throttle, and so far (couple of hours of driving and turning the car off) she is doing fine! [drive]

I guess I need to send Bailey DV to AWE for service...? I will post again tomorrow, more traffic driving to see if she is still doing good.

Thanks all for advice!
D

bitterchild
10-05-2005, 04:52 PM
the bailey probably isn't set right or needs to be rebuilt. I don't know why everyone feels the need to buy piston BPVs.

duhvinci
10-07-2005, 05:20 PM
Well, I wish I could say that swapping fixed the problem, but it did not. I guess its not Bailey DV, she started doing the same thing today again with brand new TT DV... Even spiky boost at times now.

Waste gate?

I think its time for K04 and chip...?

bitterchild
10-08-2005, 12:16 AM
it's either wastegate, wastegate actuator, n75 or associated vacuum lines.

nd4spd
10-13-2005, 09:07 PM
im having similar problems ....
do you get a rattle when you let off the gas ??? (kinda like ballbearings in a can)

my car is at the shop as we speak .... i thought maybe it was a clogged cat. well it turns out that the wastegate flap is really lose ...... we took the cat off and i could touch the flap (valve) and move it around quite a bit ..... also a small piece ...real small peice had broken off the top of the flap and was in the cat.

i looked at a new turbo ...and saw that the flap was on tight as hell .... it could not be moved by hand.
Link (http://wwwrsphysse.anu.edu.au/~amh110/all_gifs/Turbo%20page%20gifs/ExhTurbine.gif)
click on the link. (this is not a ko3) however i can illustrate using this picture. look at the round flap on the right side of the turbine. this is what was loose and moving around .... i could actully even spin the flap around



i know alot of people drive around with this rattle and have no problems .... and i drove around too for a while ....but of late the rattle had been gettin worse (rattled for a longer period)

anyways ....gettin a new(used) turbo on and it should be ready as we speak ..... hope this gets rid of the loss of power/bucking/hesitation i have.

btw ..ive changed out the throttle body and that didnt help. (also im gettin no codes ...... so hopefully this is the problem) or im gonna be pissed ......

Marcelo
10-14-2005, 07:54 AM
So... Is it fixed?If i am having the same wastegate problem do I really have to swap my turbo?

nd4spd
10-14-2005, 09:28 AM
dont know if its fixed yet .... am supposed to get it back today.

nd4spd
10-14-2005, 12:31 PM
got it back ...runs fine so far ......
but i'll have to drive it a bit more before i can get completely comfortable.

the last time i drove over 200 miles before the problem resurfaced. lets hope for the best.

the rattling has gone away ...... i'll get pics of the old turbo and post them up as soon as i have some time.

Marcelo
10-14-2005, 12:35 PM
Great! Hope to hear from you soon...

Thanks dude...

duhvinci
10-14-2005, 02:38 PM
Yes sir! Hopefuly she is all good to go, good luck!

My car - has not done it since last post here. If it was the waste gate issue - it will be gone soon, K04 is on its way, stainless high flow cat too, borla catback is here. So changing everything [wrench]

nd4spd
10-16-2005, 11:27 AM
Originally posted by duhvinci
Yes sir! Hopefuly she is all good to go, good luck!

My car - has not done it since last post here. If it was the waste gate issue - it will be gone soon, K04 is on its way, stainless high flow cat too, borla catback is here. So changing everything [wrench]


replaced the turbo and the problem is still there .... although the hesitation/jerking in not as bad ....... the only thing left to do now is change the MAF ...after which i'm gonna trade the bitch in.
im sooo pisssed offf right now ...i dont know what to say.

duhvinci
10-16-2005, 11:39 AM
That sux!!! So is N75 you have checked?

nd4spd
10-16-2005, 05:15 PM
would it throw a code if the n75 was messed up ?!?!?
im going to check that too ...tomm.
thanks

duhvinci
11-01-2005, 01:36 PM
nd4spd - any updates on your boost issue?

I've just installed another stock N75 valve (thanks Derek!), test drove, stopped for a few, drove again - so far so good, keeping my fingers crossed [hail]

I really want this to be it, just want to make sure I worked out ALL of the bugs before intallation of K04 and related pieces begins [wrench]

D