Author Topic: Boost spec vs actual log  (Read 3990 times)

Offline novadragon007

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Boost spec vs actual log
« on: 22 February 2013, 19:32 »
Can someone please have a look at this graph and tell me if thats normal actual boost seems really high versus specified boost and if it is out is it a boost leak or a faulty n75, N75 cycle is the little red spikes at the bottom of the 2nd pic.



N75 Cycle



as always i do appreciate and info
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Offline Chris.

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Re: Boost spec vs actual log
« Reply #1 on: 23 February 2013, 00:03 »
Probably better off posting the actual log file up.  Cant tell nout from that.

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Offline novadragon007

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Re: Boost spec vs actual log
« Reply #2 on: 23 February 2013, 11:12 »
https://www.dropbox.com/s/wxi4s4mifriil1f/LOG-01-032-115-118.CSV

I think that should be it ready to view didnt know how to attach here so its sharing via my dropbox account
Mk4 GTi 1.8t 16" BBS Alloys, Coilovers, Full Exhaust, Catch can..... More to come - If i ever beat this 17705

Offline Chris.

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Re: Boost spec vs actual log
« Reply #3 on: 23 February 2013, 11:48 »
Looks like its in limp mode?

There is no N75 duty so I guess tehre is a fault there somehow....something electrical or triggering N75 valve not to work.

Fuel trims are also a bit rich on idle  ECU is pulling 6.9% of fuel to try meet the fuelling set in the ECU,

Can you do 1 run in 3rd gear, logging the MAF sensor, Actual/specified boost

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Offline novadragon007

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Re: Boost spec vs actual log
« Reply #4 on: 23 February 2013, 12:12 »
ill see if i can get it done in a bit waiting on the postie bringin me some goodies.

Would it go into limp mode without the engine light being on? and if it is in limp mode it still feels pretty punchy, either that or the golfs limp mode was more powerful than my crappy 2 litre astra was haha.

MAF is group 002 right?
Mk4 GTi 1.8t 16" BBS Alloys, Coilovers, Full Exhaust, Catch can..... More to come - If i ever beat this 17705

Offline Chris.

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Re: Boost spec vs actual log
« Reply #5 on: 23 February 2013, 12:13 »
They usually just feel dead.

I think MAF is 002, it will tell you on the labels above the columns.

Any fault codes?

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Offline novadragon007

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Re: Boost spec vs actual log
« Reply #6 on: 23 February 2013, 12:28 »
that damn 17705 pressure drop code is back thought id got it sorted but im suspecting diverter valve now and a fuel system to lean code ill get the exact code just shortly.

on a seperate note and this may be a stupid question but does the piston/spring diverter valves work the same way as the standard diaphram ones? just got a spring one in the post and when you force the spring up from the bottom like you would test a diaphram one and cover the hole at the top the piston just falls back down and only when i remove my finger from the top it will let a little bit of air out.
Mk4 GTi 1.8t 16" BBS Alloys, Coilovers, Full Exhaust, Catch can..... More to come - If i ever beat this 17705

Offline novadragon007

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Re: Boost spec vs actual log
« Reply #7 on: 23 February 2013, 13:55 »
right just put a standard diverter valve back on it and now its being hella weird. 1st and second will give decent pull 3rd is like its got nothing as if no boost developing 4th gives a little bit but is hesitant around 4500 revs its like it just wont go any farther and 5th just seems like nothing aswell. it was hesitant in second at one point aswell as if it had hit a red line but i was only at around 3000revs or so. N75 or N249????  Ill get that log done once my laptops charged up.
Mk4 GTi 1.8t 16" BBS Alloys, Coilovers, Full Exhaust, Catch can..... More to come - If i ever beat this 17705

Offline Chris.

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Re: Boost spec vs actual log
« Reply #8 on: 23 February 2013, 14:02 »
Get the logs done, list fault codes and go from there,

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Offline novadragon007

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Re: Boost spec vs actual log
« Reply #9 on: 23 February 2013, 14:54 »
https://www.dropbox.com/s/1i2nduwk51q46oc/boostmafn75.CSV

4 markers, marker 1 and 3 were the start of a red line run for 2nd and 3rd gear markers 2 and 4 were where i entered 3rd gear and wot ran.

Fault codes are.

Saturday,23,February,2013,14:44:31:32264
VCDS Version: Release 11.11.3

                Address 01: Engine       Labels: 06A-906-032-AUM.lbl
Control Module Part Number: 06A 906 032 DR
  Component and/or Version: 1.8L R4/5VT         0002
           Software Coding: 11500
            Work Shop Code: WSC 00000 
                      VCID: 71E3CB1D3BB23B1
3 Faults Found:

16804 - Catalyst System; Bank 1
            P0420 - 35-00 - Efficiency Below Threshold
17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)
            P1297 - 35-00 -
17545 - Fuel Trim: Bank 1 (Add)
            P1137 - 35-00 - System too Rich

Readiness: 0000 1001


any ideas??

Mk4 GTi 1.8t 16" BBS Alloys, Coilovers, Full Exhaust, Catch can..... More to come - If i ever beat this 17705