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Model specific boards => Golf mk2 => Topic started by: POWER PLANT on 26 April 2009, 17:48

Title: boost problems
Post by: POWER PLANT on 26 April 2009, 17:48

alright guy's..

Right ive got a mk2 AUM/AGU Inlet,QPENG(PLUG/PLAY) k03s turbo and injectors,forge 007p..n so on!

But just recently it wont hold anymore boost than 10psi when ya floor it! It used to hold upto 22psi.. Ive had a full service and so on in the last month costing a good 700 notes and thoght that would solve the issue but no such luck. :angry:

The guy that did my work(top bloke) works for audi and said its the actuator broke down after hold so much boost for so long. would that be right???

And what would ya up-grade to.........

Title: Re: boost problems
Post by: john905 on 26 April 2009, 19:05

could be if the acuator is not letting the wastegate shut you would have that problem  what you need to do is check for boost leaks and make sure your wastegate is compleatly closed

Title: Re: boost problems
Post by: POWER PLANT on 26 April 2009, 19:21

would it make the car seem as its got a missfire??

Title: Re: boost problems
Post by: john905 on 26 April 2009, 19:44

do you have a misfire all the time or only on boost

Title: Re: boost problems
Post by: POWER PLANT on 26 April 2009, 19:48

Only on high boost, if i run the low setting 6psi nothing anything over 10psi engine dont want to no :shocked:

Title: Re: boost problems
Post by: danny_p on 27 April 2009, 01:02

missfire is bad news,    do you have software to talk to the qpeng ecu

Title: Re: boost problems
Post by: POWER PLANT on 29 April 2009, 06:58

nope aint got any software to do that, see its only really just started missin or (spiking) thats why i think its the n75 or waste gate not working properly..

Title: Re: boost problems
Post by: Diamond Hell on 29 April 2009, 08:33

Until you've got some diagnostic software on it you're scratching around in the dark, trying to guess what's wrong.  It could be a heap of things.

Title: Re: boost problems
Post by: danny_p on 29 April 2009, 08:55

i would advise getting that looked at NOW.  the qpeng  ecu dosent have half of measures to protect your engine that the stock ecu has.   is it's getting boost spikes that really isn't good.

or if your doign  it't yourself you'll just have to work through till you find the fault   

Title: Re: boost problems
Post by: sidecarphil on 29 April 2009, 11:48

your lack off boost could be a crack in the turbo where the waste gate shuts , if you have been running big boost for a long time the actuator slams shut cracking the housing

i know this because me RS Turbo did it when i was running 32PSi  :shocked: :shocked:

did do 335 BHP though  :grin: :grin:

but as the lads say sort out the miss fire cos that WILL melt a piston before a lack of boost will (again something i was used too with carp RS turbo managment ) or lack of managment !!!!! KE jet !!!!!!

Title: Re: boost problems
Post by: POWER PLANT on 29 April 2009, 12:09

Quote from: danny_p on 29 April 2009, 08:55

i would advise getting that looked at NOW.  the qpeng  ecu dosent have half of measures to protect your engine that the stock ecu has.   is it's getting boost spikes that really isn't good.

or if your doign  it't yourself you'll just have to work through till you find the fault   

Boost spike sounds more like what im gettin than a missfire. :cry:

Just changed the n75f for a new 1 and held 17psi but leveled out at 13ish it only really (spikes) when ya floor it if ya feather the boost in NOT a hick up just seems really strange :undecided: maybe change the actuator now n go from there..

 :angry: