Well I poped down to AMD yesterday afternoon for there RR Day!

Was a great afternoon.. well done Shaun!!  Took my son alone and he loved it!

But sadly, or should I say very sadly!! my mk4 only hit 167.2BHP and 175 of Torque!!

Problems or what..

Spoke to Saun quickly as he was busy as you guess from yesterday and he advised that it could be the MAF or boost Leak.. but 35BHP lost!!!!!!!!!

Well the MAF is only 2 months old was new from dealer, I have check for any boost leaks/split hoses what I could there are no splits in the hoes.

The boost gauge is hitting 15/16 PSI!! so I don't know what else could be wrong!!

Any ideas.. Pretty please as thought it should be hitting around 195/200BHP.. With a stage 1 remap, went to AMD on there last Mk4 RR day and car was standard and hitting bang on 150BHP!!  and just over 200 of torque...

So I have made 17.2BHP after remap!!!!!!!

Something wrongs there, some of you guys know me pretty well and I have always said that my dub wasn’t as quick as it was for the first couple of weeks after the remap, been advised it was the MAF but it has been change twice from main dealer since then, was checked on VAG com a month or so ago by my mate Ben, the only fault that came up was the Temp sensor, so I bought a new one from dealer (green one) other than that I haven't got a clue!! No other faults were found!

I was well gutted when I saw the results, I'll tell you!! Boo Hoo..

So any help would be most grateful...

A very sad .. S-Star

 can we get a full list of mods??

Ok.. here it goes!!

Forge 007P DV,

Carbonio,

Stage 1 Custom Code remap,

 Serbring Exhaust system,

also fitted a MAF fitted about 2month ago, bought from main dealler not a cheepie one, new spark plugs and engine coolent sensor.

Hope that helps..  any ideas welcome!

 well i would start by fittin an n75j valve. cheap and easy, and a nackered n75 valve could be the cause. next i would prob be checking for boost leaks. this can be tricky but try.

 Thanks matey, I thought it could be the N75 as well, this hasnt been changed, and I have spend 2 hours last night checking for any leaks, which I couldnt find, even had the bumper off to check the intercooler hoses as well.

But would'nt vag-com pick up on the N75 being faulty??

But losing a couple BHP is exspected but 30BHP or so is far to much!!

S-star

which spring you got on forge DV ?

 Yellow one, The Forge DV came with a green spring, but after remap changed to the Yellow one as advised.

 your right vagcom would prob pick up the fault. im out of suggestions, apart from maybe visit who ever remapped your car and have a chat to them

Yeah I will.. will call them today!! Saw my mate Vinnie from Eurotek yesterday afternoon,  he checked everything and all seemed ok. we even went for a hard drive, and he said the car pulls very well and cant see anything wrong, so the next step is to contact Custom Code!

 this might sound silly but what was the car like when you did the RR ?? did you have the correct octane fuel your car has been tuned to....?

i had mine done last year and on the day the temp was about 24 deg so i was advised that its the intercooler and hence that might be an issue and the results were affected.....and that was at jabbasport, now i aint sure weather this is right or an excuse.

 Have you got a blow on your exhaust system at all I had a similar problem and it was the manifold gasket causing the problem.

Sounds like you have a boost leak to me. First place I would be looking is the small pipes which go into the underside of your inlet manifold, there are a few small silicon pipes, which aren't part of the main charge system but can still leak boost. nearly all of my boost leaks have originated from these little b_stards splitting.

I wouldn't bother 'upgrading' the N75, just get a replacement if you think it may be gone.

Do you have vag-com?

TurboBeast:

Have you got a blow on your exhaust system at all I had a similar problem and it was the manifold gasket causing the problem.

I'd be VERY surprised if you couldn't hear this!! Does it sound like its blowing? Maybe crackle when the turbo comes in etc?

s-star:

 - But sadly, or should I say very sadly!! my mk4 only hit 167.2BHP and 107 Torque!!

 - The boost gauge is hitting 15/16 PSI!! so I don't know what else could be wrong!!

 - car was standard and hitting bang on 150BHP!!  and just over 200 of torquw...

What scale is your torque in? Nm or Lbft?

107 lbft sounds very low for something of that bhp, which says to me that although your peak torque is 107lbft, it is still holding that at the top of the revs. Would be very interesting to see a boost graph? A peak boost of 15/16 PSI sounds low.

An AGU does not put out 200lbft or even 200nm of torque in standard form.

 You seem to have a boost leak.. Bad news you cant check it via VAGCOM as and AGU does not have a MAP -sensor..  How exactly have you checked you dont have a boost leak?  Simply by looking at hoses for splits is a fruitless excersise as when the hoses get warm that when they are most likley to leak..   I would check the PCV valve first I have in the past recovered 20-30 BHP from two different AGU cars before as the PCV valve is prone to leaks...  Also change all the vac lines for silicone items especially the one ontop of the DV.  The only way to check the system for a boost leak is to get a boost leak tester...

Sprog:

 

An AGU does not put out 200lbft or even 200nm of torque in standard form.

 

A quick check of parkers for a 150ps gti says  210 Nm  or  155 lb-ft of torque.

azzle123:

Sprog:

 

An AGU does not put out 200lbft or even 200nm of torque in standard form.

 

A quick check of parkers for a 150ps gti says  210 Nm  or  155 lb-ft of torque.

Apologies. Made a small mistake in my calculation from lbft to Nm. We'll say thats Nm then!

 I will get the two graphs scanned in. standard gragh which should 151.3BHP  and the remaped graph showing 167.2BHP for you guys to browse over..

Im total stuck with thsi now. havent got a clue. i have now even contact Custom Code and explained what is happened, Iee from Custom Code will be popping down my way shorty!

Will keep you all up dated!

Sprog:

azzle123:

Sprog:

 

An AGU does not put out 200lbft or even 200nm of torque in standard form.

 

A quick check of parkers for a 150ps gti says  210 Nm  or  155 lb-ft of torque.

Apologies. Made a small mistake in my calculation from lbft to Nm. We'll say thats Nm then!

Well, the first RR made 151.3Bhp and 207Nm now Sunday it made 267.2Bhp and 107 as you can see theres somthing wrong with that! but will post the graphs up shortly.

 that seems rather humerous

 Right, graph below.. now you can see what I mean...

On the graph its showing that my MK4 was Revo'd but it is a custom code remap.

Any ideas?  I even spoke to Lee at Custom Code yesterday and he cant see whay its only 167.21 next time he is dowm my way he will have a look etc, if i dont get it sorted before then. 

Sorry about pictures, were taken by the camera phone..

standard..

Hi s-star

As previously mentioned you will most probably have a small boost leak which is causing issues,the pipework under the inlet manifold is always a good place to find split hoses on the 1.8T's.

The vehicle makes 167.2bhp and 175.7ft/lb with the C-C Phase 1 from what i can make out from the rolling road graph/printout.You are 15.9bhp and 22.7ft/lb up from standard.

If the car felt strong when it was 1st done and its died off since then there is most definitely an issue with a component or even mulitle components on the vehicle

Keep us informed of any progress that you make

S-Star

Don't dispair.

This is really one for the experts BUT the two printouts clearly suggest they are not using the same baseline.  One is gives horsepower and torque against DIN 70200 standard using imperial measurements, whilst the other gives horsepower and torque against SAE J1349 standard in metric measurements.  Whilst these are broadly similar - I am pretty sure they will not give the same results - so you may not