Whats The Symptoms Of A Blown Turbo?

[hijaked]

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

[paulr33]

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]

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 December 14, 2005 by hijaked

[R31Nismoid]

cooler piping

[T04GTR]

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

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

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

[paulr33]

the first line after 0 which is about 1/2 of a bar which is 7psi ?

is this where you mean? if so then what are you expecting it should run?

what are you using to control it ?

[Links]

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]

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 December 14, 2005 by hijaked

[hijaked]

* 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

[R31Nismoid]

i mean sounds like a connection somewhere has come loose.

It might not be totally obvious either.

making 2-3psi, rich, pig like to drive.

Are all symptoms

[R31Nismoid]

i mean without seeing the car, all any of us can do is feed you educated ideas.

[RB30-POWER]

Im with R31 on this one, vacuum leak in the plumbing somewhere.

[hijaked]

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 December 15, 2005 by hijaked

[paulr33]

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.

[Bass Junky]

"feels like a landcruiser powered by a lawn mower"

That's because it's an R33 Whale!!!!

[someonestolecc]

Take the boost controller out.

You know that 7+ on the stock gauge is 14psi right?

So half way to 7+ would be about 7psi.... which is stock.

[R31Nismoid]

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

[MANWHOR3]

"feels like a landcruiser powered by a lawn mower"

That's because it's an R33 Whale!!!!

<{POST_SNAPBACK}>

Luckily it's not an r34 whale, otherwise it'd be even heavier and slower

[wilch]

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]

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