MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: betts on November 14, 2013, 05:11:46 pm
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I currently own a prefacelift mk2 Leon cupra which I've just had to replace the engine due to a piston melting and scoring the bore anyway I've replaced the engine with a cdl engine from a golf r, everything's been fitted and it's running ok but when I come to a stop the revs will rise up to between 2-3k rpm and then slowly fall back to a normal idle, I've also had an engine management light pop on and the car has an intermittent missfire, it will be running fine and the then for a few seconds it will be like the cars running on 3 cylinders and then it's fine again. Any ideas guy because after spending 3k on the car I was expecting for everything to be fine
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have you checked the pcv?
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have you checked the pcv?
+1 for this
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Which map sensor did you use?
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I just changed the block, I believe all the sensors havnt been changed
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I just changed the block, I believe all the sensors havnt been changed
Do some forum searching, I remember something similar with a cdl engine and it was that a different sensor was needed depending on ECU.
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Sorry to sound dumb but what's the pcv?
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I just changed the block, I believe all the sensors havnt been changed
Do some forum searching, I remember something similar with a cdl engine and it was that a different sensor was needed depending on ECU.
Sorry to be a pain but have you got any idea what sensor will need changing?
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can you get a vag com scan done. where are you in the country?
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Nottingham mate
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I just changed the block, I believe all the sensors havnt been changed
Do some forum searching, I remember something similar with a cdl engine and it was that a different sensor was needed depending on ECU.
Sorry to be a pain but have you got any idea what sensor will need changing?
From memory I'd guess the map sensor...but I maybe wrong.
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I just changed the block, I believe all the sensors havnt been changed
Do some forum searching, I remember something similar with a cdl engine and it was that a different sensor was needed depending on ECU.
Sorry to be a pain but have you got any idea what sensor will need changing?
From memory I'd guess the map sensor...but I maybe wrong.
Yeah it's the map sensor but you only need to change that if upgrading from a car that previously had a K03, the Cupra has a K04 as standard so should have the 3 bar (I think it is) map sensor.
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The golf had a dsg gearbox if that helps. I thought with the cars revs rising after coming to a stop it may be fuel pump related but I havnt got a clue, I'm at the end of my tether :sick:
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Yep, needs logging to determine the fault. There are quite a few faults that could do similar to what you are describing, including the runner flap position fault or throttle body fault to name a few. Unless it is logged and you get a code to work from you could just end up doing needless work. :smiley:
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The PCV is the Positive Crankcase Ventilation valve.. it controls the amount of vacuum present in the crankcase, in other words it's a more sophisticated system than cars which simply feature a breather pipe which links into the air intake pipe.
If your PCV fails, you may experience rough running amongst other symptoms.
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Id check the PCV first. Easy way of checking just search the forum plenty of threads. Second id check for a air vacume leak somewhere. Maybe get a smoke test done.
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I have the latest revision Pcv for sale http://www.mk5golfgti.co.uk/forum/index.php/topic,73929.0.html
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Thanks for all the replies guys, I'm determined to get to the bottom of this problem