Turbo problems with no error codes

[Bug_racer]

Just a stab i the dark, Not exactly sure how the standard wastegate setup is but i'd assume its an internal gate with an external vacuum actuator. See if you can find it and see if it's plumbed up ie no hoses split or popped off etc

Its a pressure actuator , requires pressure to open wastegate . If you crimp the hose you should be able to overboost the turbo .

---------- Post added at 01:53 PM ---------- Previous post was at 01:52 PM ----------

Not sure if the MAF will throw a code, but could be an issue. Apparently disconnecting the MAF will get normal boost back (not a solution, but could show the MAF is the issue).

Doesnt really work on DBC turbo VAG cars , works alot better on DBW cars in diagnosing MAF issues

---------- Post added at 01:55 PM ---------- Previous post was at 01:53 PM ----------

Still been having problems with this, and i think i maybe on the right track.

Pcv and/or fpr

I noticed a big drop of vac on the weekend down to about 18 at idle was about 22 (hg), so replaced all the small vac hoses from the manifold and fpr then noticed this (see pic)




Just above the rectangular shape on the hose is a large split, I've tempory used some high pressure silicone tape to cover it till i replace it. Vac came back to 20 but after further playing and listening i can hear air coming from the fpr.

What would i do to fix a leak from the fpr??

Also what should the normal vac readings should be??

That hose is a common problem now . It splits causing air leaks/boost leaks . Its not cheap to fix about $80 from a dealer

---------- Post added at 01:56 PM ---------- Previous post was at 01:55 PM ----------

Possible the bearings have gone in the turbo.... causing the squeal. I'm not a mechanic but they are 1 of the 2 moving parts inside a Turbo. either that or your turbo has become unbalanced and is grazing the inner wall. I could be wrong however

KO3 runs a sleeve not a bearing

[noone]

Cracked Pcv hoses near the intake mani are a common issue on your car from what I've seen. If you can't find much on here, check the 1.8t section on vortex.

[theOctopus]

Cool ill look into these things, another thing I've noticed is I'm not getting the same dv sound anymore if any sound at all, could this also cause this spool noise, it's a Apr r1 dv and is meant to be matinance free. I'll recherche k and try my old dv tonight to check its a dual port so I should be able to hear it release presure.

I've replaced and triple checked all hoses from and to the turbo.

Also does anyone know the part number for that cracked hose?

Also I do have 21hg of vac once the car is warm at start up its 18hg

Sent from my GT-I9100

[theOctopus]

Its a pressure actuator , requires pressure to open wastegate . If you crimp the hose you should be able to overboost the turbo .



KO3 runs a sleeve not a bearing

So the line running to the wastegate from the n75 controls this, should I be able to move the arm from the wastegate with my hand?

So no bearings, so is the noise a leak? or could it be the turbo not getting oil?

Sent from my GT-I9100

[grtuned]

check the oil feed pipe for blockage. remove and inspect its worth the check for peice of mind. if there blocked no oil to turbo and they will squeal untill they seize!!!

[theOctopus]

check the oil feed pipe for blockage. remove and inspect its worth the check for peice of mind. if there blocked no oil to turbo and they will squeal untill they seize!!!

Can this be done with out a full oil change??

Sent from my GT-I9100

[grtuned]

The pipe should come off your oil filter housing and then down to your turbo. Full oil change should not be required you may lose only small amount of oil while inspecting.

[theOctopus]

Here is a sound clip of the sound at 2 seconds in it can be heard, has anyone had this happen on their car and what was the problem.

The pipe should come off your oil filter housing and then down to your turbo. Full oil change should not be required you may lose only small amount of oil while inspecting.

OK thanks grtuned, I didnt get time to look at it last night, hopefully tonight, I went back over the vac lines and found one that had split that goes to the DV so replaced that went for a drive still no DV noise.

Cheers again for the help.

[theOctopus]

Well I've fixed the noise for the moment.

First I replaced all the vac lines with fuel line and screw type hose clamps, dv working as it should again.

Second I made a new pipe to replace the split one, check it out, its temporary for now, bursons didn't have any brass right angle hose joiners, so I've made do with this.



When I get a new pcv valve ill remake it again.

Cars booked in for Monday to get scanned and a few things looked at but at least for now the noise is gone.

[leighaus]

good to hear mate . nothing worse than the tiny little unseen problems that are a pain in the arse to even find.