sounds like maf related...id re-check your n75 make sure its not a j valve as these can cause over boost and subsequently limp mode...and check clean lambda's to as they could be why it throwing code up for running lean...coilpacks..?? Just all the basics really...
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Well, the MAF was replaced today, No different, brand new part from Specialist cars (TPS) so next bet i was thinking was N75 as mentioned or the AIT sensor? Was goin to swap with mine and clean the AIT and see if that helps. 
Anyone know if its Bank 1 and Bank 2 lambda that adjusts the fueling? or just one of them and the other for detecting catalyst efficiency
Anyone know if its Bank 1 and Bank 2 lambda that adjusts the fueling? or just one of them and the other for detecting catalyst efficiency
Yeah, bank 1 mixture adaption below threshhold or somethin, i cant remember the exact one, should of written it down lol. When my pre cat lambda was ****ed it still boosted fine , but the light on the dash was on.
Well, the MAF was replaced today, No different, brand new part from Specialist cars (TPS) so next bet i was thinking was N75 as mentioned or the AIT sensor? Was goin to swap with mine and clean the AIT and see if that helps.
Anyone know if its Bank 1 and Bank 2 lambda that adjusts the fueling? or just one of them and the other for detecting catalyst efficiency
as much as i love TPS for their cheaper parts, they have had some serious problems with their MAF stock recently.
my mate had 4 MAF's from them which where all faulty, audi ended up pulling a MAF off a brand new car to fix the issue.
Chaps,
Checked this car tonight and there were 2 faults listed on VAGCOM
Address 01: Engine Labels: Redir Fail!
Part No: 6K0 906 032 AB
Component: 1.8L20VTCUPRA R 0001
Coding: 11500
Shop #: WSC 00000
2 Faults Found:
17963 - Charge Pressure: Maximum Limit Exceeded
P1555 - 35-10 - - - Intermittent
18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
Readiness: 0010 1001
When we logged the car, it became clear that there has been some sort of remap put on there at some point. Peak boost logged was 1 Bar before it dropped to limp mode.
The car has had the N249 bypass, a new N75, a new MAF and a new lambda probe. The coilpacks have not yet been checked however.
Fault codes are listed as follows according to wiki.reoss-tech.com
17963/P1555 - Boost Pressure Control: Upper Limit Exceeded
Possible Symptoms
Reduced power output
Limp mode
Possible Causes
Boost Pressure too High
Hoses/Pipes incorrect connected, disconnected, blocked or leaking
Charger Pressure Control defective
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
Check / Clean mechanism for variable nozzles
Retrieved from "http://wiki.ross-tech.com/index.php/17963/P1555/005461"
and
18010/P1602/005634 - Power Supply B+ Terminal 30: Voltage too Low
Possible Causes
Cables on the Battery were removed
Battery weak (voltage)
Generator Disfunction
Possible Solutions
Check Battery Cables
Check/Replace Battery
Check/Replace Generator
Special Notes
If multiple Control Module have Power Supply Faults stored, it's most likely to be one common Problem like the ones shown above. Otherwise when only one or two Control Modules have such Codes stored you better start searching at the individual Power Supply of these Modules.
Retrieved from "http://wiki.ross-tech.com/index.php/18010/P1602/005634"
A quick check with the Revo Select Plus box saw it pick up what could be a Revo remap, but the settings were Boost 247, Timing 9 and Fuel 9. Not being familiar with Revo settings on a 1.8T, I did not interfere with it, but is it possible this is normal? If so, what should it be set at using Select Plus? I know that the TFSi cars are set for boost between 1 and 9 where normal boost is approx 6, timing is 6 for super unleaded fuel and fuelling set at 9.
Ta,
Horace
Checked this car tonight and there were 2 faults listed on VAGCOM
Address 01: Engine Labels: Redir Fail!
Part No: 6K0 906 032 AB
Component: 1.8L20VTCUPRA R 0001
Coding: 11500
Shop #: WSC 00000
2 Faults Found:
17963 - Charge Pressure: Maximum Limit Exceeded
P1555 - 35-10 - - - Intermittent
18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
Readiness: 0010 1001
When we logged the car, it became clear that there has been some sort of remap put on there at some point. Peak boost logged was 1 Bar before it dropped to limp mode.
The car has had the N249 bypass, a new N75, a new MAF and a new lambda probe. The coilpacks have not yet been checked however.
Fault codes are listed as follows according to wiki.reoss-tech.com
17963/P1555 - Boost Pressure Control: Upper Limit Exceeded
Possible Symptoms
Reduced power output
Limp mode
Possible Causes
Boost Pressure too High
Hoses/Pipes incorrect connected, disconnected, blocked or leaking
Charger Pressure Control defective
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
Check / Clean mechanism for variable nozzles
Retrieved from "http://wiki.ross-tech.com/index.php/17963/P1555/005461"
and
18010/P1602/005634 - Power Supply B+ Terminal 30: Voltage too Low
Possible Causes
Cables on the Battery were removed
Battery weak (voltage)
Generator Disfunction
Possible Solutions
Check Battery Cables
Check/Replace Battery
Check/Replace Generator
Special Notes
If multiple Control Module have Power Supply Faults stored, it's most likely to be one common Problem like the ones shown above. Otherwise when only one or two Control Modules have such Codes stored you better start searching at the individual Power Supply of these Modules.
Retrieved from "http://wiki.ross-tech.com/index.php/18010/P1602/005634"
A quick check with the Revo Select Plus box saw it pick up what could be a Revo remap, but the settings were Boost 247, Timing 9 and Fuel 9. Not being familiar with Revo settings on a 1.8T, I did not interfere with it, but is it possible this is normal? If so, what should it be set at using Select Plus? I know that the TFSi cars are set for boost between 1 and 9 where normal boost is approx 6, timing is 6 for super unleaded fuel and fuelling set at 9.
Ta,
Horace
Last edited:
Having checked this out, it would be worth checking the hose between the N75 valve and the wastegate lads.
Also, spoke to Revo and they said it should be set with your mods for boost 5 or 6, timing same and fuelling is not controlled.
They said there is no way boost should be 247 unless someone has tried to copy Revo code and its come up as such.
We can try and adjust the boost or put it to stock assuming it is Revo code (keep Callum happy) based on your own decision using my select plus controller, but you should check the hose first i think.
Also, according to Revo, you desparately need an intercooler on there
.
Hopefully if cuprabaz sees this he will be able to tell us how his brothers car is set up Revo wise.
Also, spoke to Revo and they said it should be set with your mods for boost 5 or 6, timing same and fuelling is not controlled.
They said there is no way boost should be 247 unless someone has tried to copy Revo code and its come up as such.
We can try and adjust the boost or put it to stock assuming it is Revo code (keep Callum happy) based on your own decision using my select plus controller, but you should check the hose first i think.
Also, according to Revo, you desparately need an intercooler on there
.Hopefully if cuprabaz sees this he will be able to tell us how his brothers car is set up Revo wise.
I'v mabey read this wrong, i cant remember if its sps3 or selector plus, but can you not turn off the revo with one of them reverting the car to stock and try it out.
And did rhys mention about the EML light?? it appears that it has either been removed or isnt working correctly. It doesnt light up when the ignition is put on. Also mabey pointing in the direction someone has tampered?
And did rhys mention about the EML light?? it appears that it has either been removed or isnt working correctly. It doesnt light up when the ignition is put on. Also mabey pointing in the direction someone has tampered?
c41lum
Guest
bit of an update
coilpacks where changed and it did appear to make a differance however.....
the car only seems to jump into limp mode when you plant the foot in second and the boost cuts out at roughly 3.5 - 4k rpm however if you gradually apply the throttle in second above the 4k and then go for it in each gear it pulls all the way without any hesitation
it seems the car doesnt like the sudden boost increase
coilpacks where changed and it did appear to make a differance however.....
the car only seems to jump into limp mode when you plant the foot in second and the boost cuts out at roughly 3.5 - 4k rpm however if you gradually apply the throttle in second above the 4k and then go for it in each gear it pulls all the way without any hesitation
it seems the car doesnt like the sudden boost increase
N75 issues somwhere thats a good explanation of what mines was doing at some point before the n75 and hoses were changed,
so much was wrong with my car but get the n75 looked at.
so much was wrong with my car but get the n75 looked at.
fyfer15.
Guest
so if i was to get as n75 should i go for a stock on or get a j or h valve? also where did u get your hoses from mate? i was lookin for hoses but wasnt sure where or what to get. cheers to everyone thats giving advice and also cheers to bazzle c41 lum and dj horrace for putting a hand in. might gettin her running right before summer lol.
Your running revo so not too sure on the n75 as i went for stock theink it was an F the updated version of the c i went for, best ask revo what you should go for.
First of all check the hoses for splits or any leaks, if not just take it off and put on again with decent jubilee clips. That would be my 1st option no point in buying hoses if you don't have to.
Any silcone place could do it can't remeber what the sisze are just measure them, SFS hoses, forge, fleabay or the dealers if you want.
First of all check the hoses for splits or any leaks, if not just take it off and put on again with decent jubilee clips. That would be my 1st option no point in buying hoses if you don't have to.
Any silcone place could do it can't remeber what the sisze are just measure them, SFS hoses, forge, fleabay or the dealers if you want.
fyfer15.
Guest
well i got a 6month warranty with the garage i bought the car from so am goin to see if they are happy if i put it into seat and get the warranty to cover it. but my mate did think it was like a was getting a boost spike.
Sounds like its overboosting, check to see if the actuator on the turbo has been played with, should be showing 12-13threads if its showing quite a few more chances are this could be whats thrwoing you into limp mode.
Failing that as others have said try a known working N75.
Failing that as others have said try a known working N75.
fyfer15.
Guest
replyin to your suggestion about trying a known workin n75 i have tried running it with my mates n75 from his mk3 cupra and theres been no difference to it and he ran with the n75 from my car and his is working fine so am really stuck on what to do now?
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