Car goes into limp mode all the time...

[AudiS3Quattro]

hi all first post on here i bought my ibiza cupra about a month ago and it seems to go into limp mode all the time had it on vag-com coming up as boostin issues it was told has a ko3s revo stage 2 n75 bypass and its only boosting to 14psi does this seem right

any ideas or suggestions would be great martyn

 

[Reuvers]

post the code for us, as there are many different 'boosting issues'

14 psi is not enough no. But iirc limp mode is about 7 psi. Stage 2 should hit somewhere around 21 psi

Might be a leak somewhere, so best place to start (also cheapest) is run past all the hoses and see if connections are ok. Get it on vagcom as well, and if you don't have it then buy it. You'll be needing it plenty with these cars


oh and welcome; change the name though lol

 

[Mat]

welcome along

 

[ibizacupra]

it wont be n75 bypass.. unless its running a manual boost controller or such..
14psi is either a low revo setting (it is adjustable) or something else.

You need vag-com and logging to confirm whats going on.
Do you have an SPS revo switch box or Select+ with the car (to adjust revo? or check its settings at least?) - you will need this also

where abouts in the world are you?

 

[AudiS3Quattro]

thanks for the reply guys

i have been given these codes from vag com

17964 turbo defective wastegate
17535 something injectors lol
17695 turbo bypass valve wiring

hope someone can help as its anoying me alot as i have owned the car a month i have need new headgasket thermosta alternator i have spend over 1k and still is not working correctly do you think he was lying when he told me of the mods?

also how much is vag com to buy and where from
thanks alot martyn

 

[Reuvers]

http://www.seatcupra.net/forums/showthread.php?t=47135&highlight=17936

this is where you have to look up any fault code you'll be having in the future

at the moment the ones you have are:

17964/P1556 - Charge Pressure Control: Negative Deviation
Possible Symptoms

* Reduced power output
* Limp mode

Possible Causes

* Boost Pressure too Low
* Hoses/Pipes incorrect connected, disconnected or leaking
* Charger Pressure Control defective
o VNT (variable nozzle turbo): nozzles stuck
* Solenoid Valve for Boost Pressure Control (N75) defective

Possible Solutions

* Check Hoses/Pipes to/between Components
* Check Solenoid Valve for Boost Pressure Control (N75)
* Check / Clean / Replace Charge Pressure Control
o Check / Clean mechanism for variable nozzles


17535 P1127 Long Term Fuel Trim mult.,Bank1 System too Rich

17695 P1287 Turbocharger bypass valve open

 

[ibizacupra]

thanks for the reply guys

i have been given these codes from vag com

17964 turbo defective wastegate
17535 something injectors lol
17695 turbo bypass valve wiring

hope someone can help as its anoying me alot as i have owned the car a month i have need new headgasket thermosta alternator i have spend over 1k and still is not working correctly do you think he was lying when he told me of the mods?

also how much is vag com to buy and where from
thanks alot martyn

were the codes cleared after the headgasket job was done?
some of these may be disconnection type errors.

If you clear the codes now, will these all return on first driving the car again?

 

[AudiS3Quattro]

yes after theheadgasket was replaced the codes came up but i will get it put back on vag com but still only boosting to 14psi and double checked and it has a stage 2 revo for sure.

i have also been told it could be the forge actuator as its on a slight angle?

thanks martyn
ps thanks for changing the title i am pants on computers to be honest

 

[ibizacupra]

forge actuator cos its on an angle?
was this fitted before it then started doing this?

 

[AudiS3Quattro]

the lad who owned the car before me (ian on here i think) had the ko3s, intercooler and actuator fitted and then took it for the remap and the rod from mthe actuator is on a angle which could be causing it to stick but would this effect the boost?

thanks martyn

 

[ibizacupra]

its possible and can be checked.. apply pressure to the actuator progresisvely and look for sticktion

 

[AudiS3Quattro]

hey still have no luck with the car if anyone could help that would be great a lad from near to me on here damogen with a mk4 used his vag com to check the car these are the codes it read any help appreciated cheers martyn


Here are the results from the scan:

VAG-COM Version: Release 311.2-N

Control Module Part Number: 6K0 906 032 AA
Component and/or Version: 1.8L 20VT EU3 0002
Software Coding: 10500
Work Shop Code: WSC 78897
9 Faults Found:
17964 - Charge Pressure Control: Negative Deviation
P1556 - 35-10 - - - Intermittent
17535 - Fuel Trim: Bank 1 (Mult): System too Rich
P1127 - 35-00 - -
16486 - Mass Air Flow Sensor (G70): Signal too Low
P0102 - 35-10 - - - Intermittent
16795 - Secondary Air Injection System: Incorrect Flow Detected
P0411 - 35-00 - -
18087 - EPC Warning Lamp (K132) Circuit: Open
P1679 - 35-10 - - - Intermittent
18099 - Malfunction Indication Light (K83): Open Circuit
P1691 - 35-10 - - - Intermittent
17956 - Boost Pressure Regulation Valve (N75): Open Circuit
P1548 - 35-10 - - - Intermittent
17840 - Secondary Air Injection Solenoid Valve (N112): Open Circuit
P1432 - 35-00 - -
17695 - Boost Pressure Control Valve (N249): Open Circuit
P1287 - 35-00 - -

 

[ibizacupra]

you been unplugging stuff?

 

[mr_D]

thats a nice list.

is the n75 in the right way? myki had this issue when getting remapped and they couldnt get it over something like 12-14psi

 

[ian_cupra]

short somewhere, and i bet its either a melted n112 or n249, fallen onto the manifold after the n249 bypass, just a guess

 

[AudiS3Quattro]

what could have fell onto the mainifold?

as for have i been unplugging stuff no the car came like this it has the n249 and n 112 by passed but no resistors in place i really am puzzled as i have no clue on these engines at all

 

[ibizacupra]

bodged melted wires by the N249/112 I suspect...
if you reset these codes they all come back immediately?

 

[ian_cupra]

seen this a few times, including on my car

just check down the back of the block / on the top of exhaust manifold for anything melted or that shouldnt be there