BOOST ISSUES STILL , AFTER REMAP ?

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I remember when you came and scanned it before you done anything and all was ok etc with your equip. Ive cleared the code and as usual the car goes a lot better and picks up quicker to but still not 100% and laggy in the mids .i could deal with that but just doesnt seem to stay that way though !  i cant see any visual leaks/splits/oil residue around the pcv crap . most of its been replaced with new though .
ive been on the phone to my local tps who are gonna do me another maf tomorrow so will see . it would be great to get car up to nick to find fault but tbh its a bloody long way and it took them around 5hours just to get to me due to heavy traffic etc + its goona cost me fuel and money to find/fix fault . to go up there a find its a turbo issue would be pointless as i wouldnt spend more money to get it done as it starts getting beyond a joke and time to call it a day as its now on 114k and ten yrs old . it may well be a boost pipe with a tiny hole/split but then to spend a ton on a forge boost pipe set to get rid of old crap seems to much if it isnt a pipe problem .
did have a smoke tester (snap on 700notes) but gave it back as to much money to not use it enough .
dont have vagcom only a modis and dont think i can log with that .

if i have no luck i will just out the car and go back to jap as the car owes me 4k already and its worth no where near that !!!

[james2]

I know how you fell mate mines the same ...first i change the N75 ,but it was worse put the old 1 back on then it was better but today...it doing it again ...im thinking MAF  ....it does me head in keep checking for boost leak but cant find 1....no fault codes and the car ticks over fine ...when it does the problerm i try to dip the clutch give it loads of revs but nothing so just hold the throttle on the floor crawling along then ...boost wheels spining ....i hope i find out whats doing it or im going to sell it ,and say its standard ...it hasnt had a remap

[RTechUK]

The member Jonnyturbo had major turbo lag issues.  A 5 min health check of the actuator found the wastegate was bleeding the exhaust gasses off which caused the lag. Then a 5 min job to reset the actuator.  And now the turbo is spooling as it should and the car fliping pulls like a monster. Now running stage2 spec and 230bhp with a really wide torque band.

From day one Jonnies car has had issues, from being down on power running the stock map with a handful of fault codes, to running the spec1 remap with a N249 fault and having turbo lag and boost issues. But he has followed everything I have told him and took my advice, very little money spent getting the car running 110% maybe £180 max on parts then just his time.  No need to spend a ton on fancy Forge pipes, just find out which is the faulty item and replace it with a new OEM part.

If you dont want to spend time trying to work the issues out or you dont want to take half a day out and drive to us, I will try and talk you through it step by step.  It will be hard because you dont know how to use your Modis so I will give you all the things to test without the use of diagnostics tools

Job 1: PCV System

Take off boost side of PCV system off and check its working and not leaking.

Remove N249 / SAI plate from front of inlet
2 x 5mm allen bolt and 2 x 10mm nuts.

Remove main PCV pipe which connect to the nipple under the inlet manifold, pull green clip from crank breather tube,  remove one way check valve from rubber housing. and pull the hole mess of pipes out and inspect on the bench.    blow down the main pcv pipe which connected to the inlet and try to haer fro leaks ( I am 99.9% sure you will find a leak)  Main issues in this area are,
1: one was valve not fully shutting and leaking boost, a new upgrade G revision from TPS will set you back £7. 
2: Rubber pipes with hair line split in the innder bends
3: Black plastic bit which is part of the brake servo line leaking, again a new upgrade revision from TPS £30

Let me know how you get on here, then we will go to the next stage ect..

Nick.

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Ok cheers nick will try that first . im still waiting for the modis 2day training course to happen as the scanner has so much stuff on it and i keep finding different stuff eveytime i use it . found the measureing blocks last week to reprogramme the egr valves on the new vauxhalls etc , bloody nightmare . i dont use it all the time but i guess as you guys are constantly on yours its a walk in the park for you !!
if there are certain measurements/figures i could look at in live data then let me know as i can freeze frame them or record as i drive etc .
im sure its a pipe/vac/boost leak but just need to find it i guess .

[james2]

i think iv just found me problem ....the acuator on the turbo is stuck ,i cant move it ,should this be like this ?

[RTechUK]

i think iv just found me problem ....the acuator on the turbo is stuck ,i cant move it ,should this be like this ?

Should be free, little force needed to pull it open.

[Hulmie]

i think iv just found me problem ....the acuator on the turbo is stuck ,i cant move it ,should this be like this ?

Should be free, little force needed to pull it open.

As above, but if its to easy to pull then actuator is probably shot. Try a 10mm spanner inbetween the wastegate arm and pull away from the actuator housing, it should snap back nice and easy. This shows its closing the wastegate off correctly.

[james2]

how can i free it iv soaked it in wd40 put its stuck ....i might put a screw driver on the back of the arm and hit it with a hammer ...to see if it frees it up......

[Hulmie]

dont hit it with a hammer, you need to prise the arm using a spanner

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Update - fitted new dealer maf and still laggy in the mids and you can feel the boost on/off slightly rather then just pulling so i can now rule that out !!

tried moving my actuator and its free if i pull on it and it springs back , but wether its seating properly like nick said im not sure . still havent had time to inspect the pcv crap as my 5yr old daughter wants me to come straight home from work to go to the park as weather is nice so will try soon !

just wondered if this could also be a pencil coil issue due to increased boost from the map ? when uping the boost on the skylines you need to fit new uprated splitfire coils (300 notes) as the standard ones give spluttering issues at the top end of boost etc but mine doesnt do that but maybe one is breaking down under load ? trouble is that wouldnt keep giving the 17705 code i suppose !