Hi can anyone back up my theory as to recent bouts of power loss?

The car is a 2001 Octavia 1.9 TDI 110 model.

On hard accelaration on a hill or with 4 people plus luggage eg air port run, my car has several times suffered a loss of power just as if the clutch has slipped or as if the car has a type of over revving cut out say at about 3k rpm.Then the the car feels totally gutless until I stop and leave the car parked for a while, on re-start its fine again!

My theory is that I either have an intermittent leak within the air pipes of the turbo which manifests itself on major boosting or that my wastegate is opening and staying slightly open thus the turbo failing to spool up and deliver further boost?

Other than the above the motor feels very strong and does really pull like the preverbial train until this happens!!!

Is it any of the above or shall I look elswhere?

Thanks for your attention.

Steve

hi Steve

i had the same problem on my old mondeo

sounds like you have a problem with your injectors.go to a garage and ask them to do a injector bleed off test.

cost about £40-50 they connect four Little pots to the injectors if you are there you will see one or more fill up thats the problem this makes you car go into limp mode.

when it does this if you just dip the clutch and restart the engine this will clear the fault.

injectors cost from£10 - 2oo each i am afraid.

bill

Turbo overboost/sticky vanes or restricted fuel.

Mr Muscle the Turbo, change the fuel filter and it will be fine!

Check the forums you will see how to Mr Muscle your turbo... its quite easy when you have done it once!

Thar sounds like MAF or sticky vanes in the turbo to me.

First step - try driving the car without the MAF connected. If it performs better then the MAF is probably knackered (iirc, that is the correct).

Step two - check to see if the actuator on the turbo moves smoothly when a vacuum is applied. Disconnect the vacuum pipe from the n75 valve and suck on it with your hand onthe actuator it should move smoothly and not creak or get stuck....

Earlier post about injectors is unlikely, however cycling the ignition will clear the temporary limp home mode which gets triggered (the overboost fault will remain logged in the ECU however).

Thar sounds like MAF or sticky vanes in the turbo to me.

First step - try driving the car without the MAF connected. If it performs better then the MAF is probably knackered (iirc, that is the correct).

Step two - check to see if the actuator on the turbo moves smoothly when a vacuum is applied. Disconnect the vacuum pipe from the n75 valve and suck on it with your hand onthe actuator it should move smoothly and not creak or get stuck....

Earlier post about injectors is unlikely, however cycling the ignition will clear the temporary limp home mode which gets triggered (the overboost fault will remain logged in the ECU however).

How easily should it move if you suck on it? Is there an uprated one you can get? I thought I saw one somewhere, I think it was blue, by Pipercross or someone?

Gentle sucking should do it..... You should be able to press the actuator with your thumb (will hurt a bit, but not tooooo much).

No upgrade part as such. The vanes can either be temporarily cleaned via the Mr Muscle approach or you take the turbo off and clean it all out. Also fitting a catch can and help to keep things cleaner in the future.

Fueling - It had a service at christmas including new fuel filter, so I can discount that!!

I am thinking actuator mech or maybe MAF as Briskodian above, Turbo itself sound healthy just a sexy spool up whistle! Which my 944 Turbo does also so I think thats correct? Please advise if otherwise?

Regards Steve

The turbo can seem louder as the vanes stick and it generates too much boost - thus causing the overboot fault. This can be tested by accelerating hard up a long hill in 2nd/3rd and seeing if the car ends up in limp-home mode. If you can get the fault code reads then do so - look for the overboost code.

I still want to go with sticky vanes in the turbo. My car causes me years of grief with turbo issues..... :-(

When I problems with sticky vanes I noticed the turbo seemed to have more grunt at low revs and then you hit 3k revs and it was tractor time.

Hmmmmmmmmmmm my low range power and torque seems awsome at the moment certainly feels a match for my Saab 93 lite turbo which had good low range (but revvy) grunt, where as my 944 Turbo at low revs isnt particularly pokey, the power comes in completely differentley but once the Turbo is spooling power and torque seems to go on forever or as long as the trousers will stand it, in my case up to 130+mph whereby I ran out of useable road!

I love the science bit about Turbocharging and the simple way it provides power and the variable ways in which power is delivered as per my own experiences above. I will say though that my experiences with the 1.9TDI are that it is an is an excellent everday performer that gives great levels of performance and economy beyond what I expected! I love driving it!!! I would welcome a bit more from the suspension and steering but I guess I could find my own improvements here if I were willing invest!

Great forum fellas I'll let you know when I get down n dirty at the weekend )

Steve

Cant find the post on turbo Mr Muscling I gather Lofty is the postee, anyone have a link??? Thx!

Cant find the post on turbo Mr Muscling I gather Lofty is the postee, anyone have a link??? Thx!

It's in general guides rather than in the Octavia forums.

Sent from my HTC Vision using Tapatalk 2

http://www.briskoda.net/forums/topic/258867-loftys-mr-muscle-treatment/