Hi, Sorry for reposting but my pc keeps logging me out everytime I try to add to the previous thread.

Quick Summary of Prob:

1.9TDi 2001 Elegance Octy, goes into limp mode at around 3000rpm, after 3-4 restarts all is ok but still feels sluggish sometimes.

I have run VAG COM and have recieved the following error, anyone any ideas?

17965 - Charge Pressure Control: Positive Deviation

P1557 - 35-10 - - - Intermittent

Thanks

Sounds like the notorious sooty turbo problem.

And on the other point, what browser are you using?

Thanks Ken, am using IE7, got it sorted, i had to clear the cache and everything was ok after that. Cheers.

Hi, Sorry for reposting but my pc keeps logging me out everytime I try to add to the previous thread.

Quick Summary of Prob:

1.9TDi 2001 Elegance Octy, goes into limp mode at around 3000rpm, after 3-4 restarts all is ok but still feels sluggish sometimes.

I have run VAG COM and have recieved the following error, anyone any ideas?

17965 - Charge Pressure Control: Positive Deviation

P1557 - 35-10 - - - Intermittent

Thanks

hi

i had the power loss problem for about 3 months, totally annoying.

I have read many posts on here at the power loss/surge problem. People have changed all sorts.

I was convinced it was my turbo, new turbo £700 later, problem still there ( mk1 octy vRS ). Yesterday on the way home work, i heard a loud air sucking in noise, and the car was misfiring as if it was going to stop dead.

Checked it out when i got in and on top of the throttle valve unit is a steel elbow joined to a series of small pipes with 2 resevoirs inbetween the set of pipes.

The steel elbow had blown itself out of the throttle body unit, resulting in a huge vacuum effect of sucking in air to the TVU. I have put the steel elbow back in the hole and sealed with some quick steel putty, so hopefully it will securelt seal it, then i will know if that was the problem all along.

I hadn't noticed it before, so maybe the elbow has gradually work itself out of the hole.

A mk1 golf gti expert said 1. Try an seal the elbow, if it is the cause, once sealed with liquid metal or quick steel should sort it. New throttle valve unit from skoda £291.00 plus VAT. You cannot buy a new elbow as the elbow is factory fitted to the throttle valve unit.

2. He said if that doesnt work he said he's 100% sure the throttle valve is acting intermittantly. If thats the case i will get a second TVU.

3. Skoda mechanic said he'd try replacing the pressure sensor 1st before TVU. Pressure sensor is just under the top right hand corner of your engine cover. Mine does feel very loose and would explain one minute it drives and performs fine, then in an instant power loss and drives spluttery and sometimes sounds as if its not firing on all cylinders.

Your codes you have mentioned

17965 - Charge Pressure Control: Positive Deviation - Is this the pressure sensor ???

P1557 - 35-10 - - - Intermittent - Is this your TVU or something different ???

Has anybody changed their TVU ??

If so looking at it seems pretty straight fwd tochange undo sensor clips, disconnet pipe from steel elbow on top of the TVU, Undo the four allen key bolts.

Do you need to replace the paper gasket ? From experience will it tear when removing the old one ? Are the gaskets easy to get hold of ?

Hope you get yours sorted.

Any help, idea's would be great.

Many thanks.

:confused:

Sorry Lornster, im about as lost as you are!! I will keep you posted about what i get sorted with mine, im fairly sure the the 17965 - CHarge Pressure COntrol is the N75 pressure sensor (someone please correct me if im wrong!!) other than that I dont even know what a TVU is, my uncle once had a TVO Tractor..... different beast altogether!