Jump to content
SAU Community

Whats The Symptoms Of A Blown Turbo?

hijaked

By hijaked,
in Engines & Forced Induction

 Share

Recommended Posts

hijaked Collaborator

hijaked

Posted
Posted

hey guys

after boosting my car with a dodgy inaccurate boost gauge...

im left with very little or no boost, depending on the rev rannge.

the BOV (it's plumback) doesnt let off a loud high pitched PSHIII anymore

the car will barely hit 80km in 2nd gear, takes ages to get there too, SLOW!

im also left with car running way too rich and staling...

Have any of you experienced this?? is it my turbo?? would these probs be a sign of it being blown/dead???

i live too far away from a decent mechanic, so your help would be much appreciated!

cheers

Link to comment
https://www.sau.com.au/forums/topic/98473-whats-the-symptoms-of-a-blown-turbo/
Share on other sites
paulr33 Grand Master

paulr33

Posted
Posted

what does the stock guage show?

does it go beyond 0mmhg as in the dead middle

blown turbo symptoms:

pop noise when it happens

maye some smoke (oil seal gone)

whinning or "bearing scream" from the turbo

if its making some boost (ie above 0 then its fine) it its most likely you are running too much pressure, the ecu has protection for excess airflow which is commonly known as boost cut. turn the boost down a little and try again

hijaked Collaborator

hijaked

Posted
  • Author
Posted (edited)

Hey paul

just took for a run then... it goes above 0 and maxes at the first line

still my car feels like a slug. whne i drive it... its almost as if the boost stops, like theres an empty spot. and when you change gear the boost come back only momenterly, sometimes if i keep tapping the peddal, the car goes quicker than if i were to hold it down.

would it have anythign to do with the wastegate acctuator. coz from what you said, the turbo works,,, but it works strange as in duration and timing???

as you can tell i dont know lot about my car?? and no one around here does either

thanks for the reply!

Edited by hijaked
T04GTR Grand Master

T04GTR

Posted
Posted

hmmm. ive curently got s silvia ca18t with the same problem:

0.3bar boost with the actuator line puled off!!!! :blink:

no leaks any where

straight of the dump pipe(no exhaust/unbolted)

turbo spins easily and has minimal shaft play

i really couldent be f**ked pulling the turbo off.

its got me stumped

Links Veteran

Links

Posted
Posted

Yeah.. could be if it hesitates it's R&Ring as it's detecting too much airflow, yet when you use 3/4 throttle and keep it a bit lower it'll be fine..

had this happen to me when I was running about 0.7/0.8Bar as it would detect too much airflow, engine would "hesitate" - yet as soon as I put it back down - it was all good..

have you tried winding down the boost a bit and see how it goes..

hijaked Collaborator

hijaked

Posted
  • Author
Posted (edited)

hey guys...

ive got one of those turbo tech thingys... altho when i first boosted it, it was with a turbosmart one...

yea i mean the line thats in between the +7 and 0... ill turn it down as soon as i get to my car, and see how it goes. hmm what is the minimum psi you can set it?? can it be lower than 4???

its just got me stumped... coz theres lot of people boosting their stock cars and have no trouble, one dude i know with an r33 has his on 10psi stock car... with a pod filter.... and a atmo bov... hes car is running fine, a lot better than mine!!!!

Edited by hijaked
hijaked Collaborator

hijaked

Posted
  • Author
Posted

* R31Nismoid

what do you mean cooler piping??? leak or blockage???

if its dirty or what ever.. whats a good way to clean it?? possible to clean the cooler?? i have a un named fmic

sorry to be off topic... but whats a good way to clean the afm... im sure one of you blokes would know

hijaked Collaborator

hijaked

Posted
  • Author
Posted (edited)

hey guys.

i turned the boost down so that the stock boost gauge would max out about 1 mm below the line between 0 and +7.. the car felt a little bit punchier, yet still runs like garbage.

* R31Nismoid what parts of the car should i check??

would the fact that my car is running 'really rich' affect my car?

the cars not bad up untill you get to 70kmph..... then it just feels like a landcruiser powered by a lawn mower...

as i said before... im from the sticks, no mechanic round here would know what do to with the rb. so i do appreciate anythign said! thanks R31

Edited by hijaked
paulr33 Grand Master

paulr33

Posted
Posted

keep turning the boost down until you get the response you expect.

you are basically working around the stock ecu's excess airflow protection. it will run mega rich and dump the timing when it picks up too much airflow. so keep turning the boost down bit by bit until it feels normal again.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
hey guys.

i turned the boost down so that the stock boost gauge would max out about 1 mm below the line between 0 and +7.. the car felt a little bit punchier, yet still runs like garbage.

* R31Nismoid what parts of the car should i check??

would the fact that my car is running 'really rich' affect my car?

the cars not bad up untill you get to 70kmph..... then it just feels like a landcruiser powered by a lawn mower...

If you've turned down the boost... and its still doing it.

Its leaky cooler piping which is getting a strong suggestion.

I cant tell you where. Thats for you to workout.

Go alone ALL the piping/hosing and triple check all the connections to make sure they are tight.

I cant offer anything more than the piping... if you dont know where it is... time to take a drive to a mechanic. Regardless of where you live

wilch Grand Master

wilch

Posted
Posted

the other thing you can check is see if the wastegate actuator is still attached to the wastegate arm thingy.

My g/f's 32 had a similar problem... boosted, then nothing, no more boost, no more whoosh, no power, and a louder exhaust.

At first I thought it was the exhaust wheel had disintegrated. But Burko on these forums had a look, and was in the process of changing her turbo over to my old turbo when, after he removed the turbo heat shield, he noticed the actuator arm wasn't attached anymore. The circlip that holds the arm in place had fallen off, and the gate was stuck open.

Maybe check that?

hijaked Collaborator

hijaked

Posted
  • Author
Posted

hey guys,

been pretty flat out so i dont have time to look at the car. hopefully i can play with it soon, and ill get back to yous.

just got defected for my front tyre, so my car will be outta action for a little while, so that will give me time to look at it.

thanks again for all of your help, much appreciated!!!

cheers,

David

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • The Bogan
      Mistakes were made, my R34 Story

      By The Bogan · Posted

      Bonnet clearance?
    • joshuaho96
      Magnetic Drain Plug Snapped in Half

      By joshuaho96 · Posted

      On the bright side, at least you knew that it happened and remedied before anything happened. A friend of mine just took his Fiat 124 to a shop for an oil change and they didn't tighten the oil filter housing properly. 4.5 quarts spewed out and even after refilling + tightening the cap the engine has a tick now.
    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      So, more pain. The FAST manifold is a little larger than the stocker. This is problematic because there really wasn't much clearance to begin with, so going from 'barely enough' well into 'no' is sad based on the external dimensions of the thing, even though where it bolts to the head is the same. Result is the fuel rails sit a good 25mm higher, and this is a bit of an issue with the wiring that runs behind the motor, and the fuel lines, and everything else. When pushing the manifold on, it required a huge amount of force to crush wiring looms to fit it, sensors like the MAP sensor are about 1mm from the firewall, and the FPR just has to bend ABS lines to be forced into place. After some brainstorming and some sad drinking, the loom for some reason ran from the grommet behind the ABS sensor, then to the driver side head, then back to the passenger side head. So all of this was pulled back and stripped, a few wires cut and rejoined, so that the 'branch' was now on the passenger side's head as below: Before you basically couldn't see anything behind the driver head. This is much improved! The MAP sensor is now pointing up (instead of at the firewall) Brackets have been made up for the rail. The rails are for a LS1, the manifold is designed around a LS2 as it's base. Which of course has slightly different bracketry and water pump clearance, hence the mods people need to do. Should be hopefully mounted tonight. I spent money on a new FPR that is slightly more compact than my Turbosmart FPR1200. The gauge has also been moved to the rail. There's also apparently an ORB to AN Union instead of the adapter, because the ~25mm of the current adapter is going to make the difference. Provided this all goes together and arrives today, it'll be the totally not stressful attempt to start it.
    • GTSBoy
      Finding E-30 & E-85 in Sydney

      By GTSBoy · Posted

      This seems like a pointless exercise. There is no E30 availability. Ongoing availability of E85 should not be assumed. Flex-fuel is the only sensible approach, so you can use E85 when and where you can get it, 98 when that's al you can get, and anything in between as you fill it up and drain it down. And if that means replacing the pumps, fitting a flex capable sensor/ECU/whatever has to be done to these Renault shitboxen, then.....so be it?
    • Duncan
      Finding E-30 & E-85 in Sydney

      By Duncan · Posted

      Sorry, I wasn't very clear.....just that the standard injectors are apparently good over 600rwhp/450rwkw which you won't get to on standard turbos anyway.....they are much better sized from factory than we are used to in RBs.
×
×
  • Create New...