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Model specific boards => Golf mk4 => Topic started by: ReadieeVTS on 31 May 2012, 21:30

Title: Boost problem
Post by: ReadieeVTS on 31 May 2012, 21:30
Hi guys, I've got bit of a problem here. A few weeks ago a few of my manifold bolts come loose and so did the turbo bolts on my 1.8t so I parked it up as I couldnt be bothered with it. I've now fitted new manifold bolts and turbo bolts, so it's all bolted p and piped p nicely, now the problem is when I put my foot down the car just feels flat as f*#k like there's no pull to it! I had it mapped by r-tech about 2 months ago and it pulled like a train! Now I took the pipe off from the n75 valve which goes to the actuator on the turbo and it seems to be no vaccum, and with the pipe connected the waste gate isn't even opening, I can hear the recirc valve ever so slightly but not as it should be normally. So my question is do you guys think my N75 valve is past it?

Cheers guys
Title: Re: Boost problem
Post by: ReadieeVTS on 01 June 2012, 07:08
Anyone? I don't fancy wasting money un necessarily...
Title: Re: Boost problem
Post by: Wazzzer on 01 June 2012, 13:55
had it plugged in for fault codes?
Title: Re: Boost problem
Post by: ReadieeVTS on 01 June 2012, 16:32
Yeah, no codes have come up :s
Title: Re: Boost problem
Post by: ReadieeVTS on 01 June 2012, 21:23
From reading other peoples threads it seems as if it's gone into limp mode? I could be wrong but how do you reset this?

Lee
Title: Re: Boost problem
Post by: daz veedub on 01 June 2012, 21:26
dodgy n75 valve will cause limp mode maybe worth try another 1
Title: Re: Boost problem
Post by: ReadieeVTS on 01 June 2012, 22:23
Yeah I'm going to pick up a new one tomorrow from Tps. How do I get it out of limp mode?
Title: Re: Boost problem
Post by: Wazzzer on 02 June 2012, 10:50
engine code?
Title: Re: Boost problem
Post by: ReadieeVTS on 02 June 2012, 12:33
Engine code is a AGU, I've put a new n75 on it and there's no difference.

The car isn't limited in the revs and reaches higher speeds then 50/60. So it can't be in limp mode,
I can hear the recirc valve only slightly but there is no kick In it it will rev upto redline stationery and when driven but it's like you can't feel the turbo kick in and the wastegate is definitely not opening... Pipes could be on the wrong way round but I doubt they are :s
Title: Re: Boost problem
Post by: Wazzzer on 02 June 2012, 12:59
limp mode on the AGU is only usually hit when there is too much air coming through the MAF, it's not clever enough to do anything else  :grin:
Title: Re: Boost problem
Post by: ReadieeVTS on 03 June 2012, 15:49
When I went for the map nick put on my advisorie sheet "wet pcv system under manifold ready to split" would that have anything to do with it?
Title: Re: Boost problem
Post by: Wazzzer on 03 June 2012, 15:53
more than likely one of your PCV hoses has split then mate
Title: Re: Boost problem
Post by: RTechUK on 03 June 2012, 15:54
Even with the PVC leaking you will still get a little boost.

Have you checked for fault codes?  
Did the battery go flat?

Nick
Title: Re: Boost problem
Post by: ReadieeVTS on 03 June 2012, 16:16
It feels like there is little boost there as I can hear the 007p slightly, yeah it was parked up for a few weeks and the battery did go flat :(

I'll also throw in there that the brakes have gone quite spongey since having it back on the road Its probably got nothing to do with it but I was thinking could be down the lines of a vacuum problem?

I don't know its really stressing me out lol :(
Title: Re: Boost problem
Post by: RTechUK on 03 June 2012, 23:06
It feels like there is little boost there as I can hear the 007p slightly, yeah it was parked up for a few weeks and the battery did go flat :(

I'll also throw in there that the brakes have gone quite spongey since having it back on the road Its probably got nothing to do with it but I was thinking could be down the lines of a vacuum problem?

I don't know its really stressing me out lol :(

Clean throttle body and do an adaption with VCDS this might bring all your power back... :wink:
Title: Re: Boost problem
Post by: ReadieeVTS on 04 June 2012, 10:58
Im going to have to try find someone local with Vagcom then lol
Title: Re: Boost problem
Post by: cullygti on 04 June 2012, 11:02
check the pipe under the inlet mani as thats usually split or the one coming out of the side of the rocker on the right hand side as you look at it
Title: Re: Boost problem
Post by: RTechUK on 04 June 2012, 11:33
Im going to have to try find someone local with Vagcom then lol

where u from?
Title: Re: Boost problem
Post by: ReadieeVTS on 04 June 2012, 12:08
Im going to have to try find someone local with Vagcom then lol

where u from?

Milton Keynes mate
Title: Re: Boost problem
Post by: ReadieeVTS on 04 June 2012, 20:35
Solveddd!!!! Actuator was seized!! Woopp happy!
Title: Re: Boost problem
Post by: RTechUK on 05 June 2012, 11:30
Solveddd!!!! Actuator was seized!! Woopp happy!

That would have caught me out, Never known one to do that.

Happy Days!!  :wink:
Title: Re: Boost problem
Post by: monty9120 on 05 June 2012, 17:43
more than likely one of your PCV hoses has split then mate

is it easy to get too. i seem to have residue under my inlet manifold and im still getting a slight issue with boost
Title: Re: Boost problem
Post by: ReadieeVTS on 05 June 2012, 19:38
Solveddd!!!! Actuator was seized!! Woopp happy!

That would have caught me out, Never known one to do that.

Happy Days!!  :wink:

It was the last thing I was expecting it to be aswell to be honest. purely because I remember bringing it to you guys when you was mapping it and we was all talking about the actuator being a good one lol

Time to look into

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