Watto
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Posts posted by Watto
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Thanks. It was a dodgy remap that was causing my error code and boost problems. Still running great after the new rtech map and the error code has not returned.
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Cheers guys, at least Im sleeping at night again. The car feels so much better, no more surging and on off boost.
The new map took it to 210bhp But with a nice smooth pull through the revs.
It cost 250 from RTech all in which included the full diognostic/ pressure smoke test.
If I had known that the car was already mapped I would of rang rtech first.
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Update, took the car to rtech for a full diagnostic and pressure smoke test.
The car passed the health check to no surprise as everything had been changed, no leaks found.
It turned out the car was already mapped poducing a decent 202hp but was producing a lumpy on off boost with lots of surging.
The car is in second day of the new map and 17705 code fix and all feels good, so much smoother.
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on mine from a mental image, with the wire-loom/connection facing away from the windscreen the top hose goes to the actuator and the hose directly under that goes in the air intake pipe, and the one facing the left aide of the wire connection goes to the boost pipe. :/
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just looked at the other log and at WOT the N75 is reading around 82% and the requested and actual are close at around 2000 mbar. from around 3000-5000 revs
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Cheers ill check that tomorrow i wont be able to concentrate in the rain.
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The second log has totally different readings. That log is when it was in the limp mode.
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The N75 has been replaced with a new oem one. so not sure whats going on if its reading low. Hopefully they should spot all that on the rolling road diagnostics. You could give a thread count but I would of thought no two are the same but could also give me an indication if mine is way of.
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Stock not stick* :/ if it is the actuator hopefully they will be able spot it on the rolling road. It has been tested with a mechanical pressure pump and seems to be opening and closing as it should but dont know if the actuator has been messed with so again hopefully this diagnostic will find it and ill sleep for a week
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As for the boost levels A friend is a mechanic, 30 years in the trade and even he's a little stumbled but said if it had been mapped it would explain why we cant find the problem. He was reluctant to change anything as he had tested them and found to be working but I changed the parts anyway for my piece of mind. He found on the pc with the skoda manual and it said requested boost is 1800 mbar and after the calculations of atmospheric pressure it equals around 11psi and everyone iv asked on forums say stick should be around 10-13 psi. We did a quick log in the requested and actual with vagcom and its requesting around 2000-2200 mbar witch equals to 17 psi making me think mine has been mapped. But im not 100% on what the stock levels are for a mk1 occy vrs. Rtek even said if its requesting around 2000 mbar its likely to be mapped
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There going to run a full diagnostic on a rolling road, pressure and smoke test and hunt down whats causing the problem and will also find out if it had been mapped by the previous owner. They even said it could still be the ecu even if its never been mapped but hopefully Ill come away knowing what the cause is weather it be turbo related, hidden leak, or ecu. Ill report back my findings its in in just over a week.
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Just an update. 4 cans of carb cleaner has been sprayed over all nessery pipes, throttle body gasket, ait sensor, intake manifold gasket, injectors, around coil packs, IC everywhere and ingine idle never changes.
Iv rang Rtek and had a chat and they said it sounds like ecu problems, so going to book it in and see how it goes.
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So if mine is suspected of having a map then how would i tell if iv got a turbo failing of a map problem. My requested acording to vagcom is around 2000 mbar and when it goes into a safe mode the actual never goes above 1350 mbar but after i switch of and back on my actual will be anything from 1900 to 2200 mbar buts its boosting intermittently, sometimes kicking in late at around 3000 revs but always dhows up the 17705 code even after clearing it after the car has been left to cool down all it takes is a start and a rev up and the codes right back again. I just dont know whats causing the intermittent boosting when its boosting and also why it keeps going into a safe non boost mode after its been sat a while. And now stuck between a possible failing turbo or dodgy map but brought it on the assumption of it being stock and never messed with.
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The intercooler was taken off and checked emptied a little oil out of it and put back as no leaks found. The leak test was done with a compressor and most hoses have been taken off and tested of the car. I haven't had a smoke test done yet as no leaks have been found using all other methods and also cant find anywhere local that does smoke testing.
Thanks david 8. I Appreciate it.
Any one know what the stock psi is on a auq 1.8t 20v 180hp ? A friend said the specs are 1800 mbar but not sure what that is in actual psi or if its correct data.
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Yeah, report back if you find out. Im just thinking of sending my turbo ti a company called midland turbos for a clean up and diagnostic for £180 plus vat. They replace the bearings and stuff and comes back fully working with 2 year guarantee but checking all options before going to that trouble.
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Funny you should mention secondary air pump as mine was splitting (rivits wearing out) took the pump of and fixed using stainles steel nuts and bolts. Everytiing was rechecked before re fitting. The only thing that I havnt checked is the turbo. Could a faulty IAT sensor cause boost problems and show that code.
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The only code that keeps showing is the 17705 pressure drop between turbo and throttle valve check dv. Even after clearing the code. Start the car and rev it and the code comes right back.
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Dv has been replaced with a new oem dv.
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did a second log the next day just got round to looking at it and now the actual is keeping up with the requested sometimes reaching 2200 mbar. I cant find how to upload a link to the logs.
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did a second log the next day and the requested is around 2000 mbar and the actual is the same, sometimes reaching 2200 mbar, its been checked numerous times for leaks and non can be found, the engine bay and boost pipes are dryer than a nuns c... just dont know whats causing the intermittent boost
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Thanks for the reply. Its been checked for leaks and non found so now suspecting a faulty or sticking actuator or waistgate.
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Cheers, out all day at moment but will when I get back
All readings look ok apart from the requested boost and actual boost. I did start another thread about it but my requested boost at WOT is around 2000 mbar and my actual never goes above 1350 mbar and wondered if that could be whats throwing up the pressure drop code.
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Also cars not been mapped. Running stock. And all parts replaced are OEM parts.
17705 fault code sticky
in Skoda Octavia Mk I (1996-2004)
Posted
I had this error code and changed a load of sensors etc and turned out it was a dodgy remap that was causing it. Got the car remapped by RTech and the code has not came back and the car is running great now.