Help! Cupra not pulling more than 5psi!

[Bogwoppit]

Just took my car to a private road to stretch it legs as never done it before.
Anyway just got up to a respectable speed in 5th when all of a sudden the car stops accelerating and boost gauge dropped from 15psi to 5 psi.
Now the car will not pull above 5 psi in any gear. The oil temp never went above 90 degrees C and the water temp is normal.
I have checked that the maf and map sensors haven't become unplugged, that my t piece hasn't become loose above my dv and it seems fine. Also no dashboard lights are on.

The car is completely standard bar a jabbasport custom map and a Forge 006 dv.

Any ideas??

 

[David_smith_909]

well you have got limp mode some how

get it plugged into vagcom, if you havnt got it, maybe a few peeps local can help you out, its the only way to be sure why it happened matey, could be a few things so wouldnt like to point you in the wrong direction (if that made sence)

 

[Bogwoppit]

I left the car for about 15 mins and now it is back to normal boosting at 15 psi etc.

Does the ECU have some kind of memory, so if I plug VAGCOM into it in about a months time will it show why limp mode was initiated?

 

[David_smith_909]

if their was a fault their it will log it on the ecu and come up when you do a scan

if you reset it though by disconnecting the battery it will not be their

 

[Bogwoppit]

Thanks David

 

[Molehill_Mike]

Deffio limp mode, I hate that... luckily dotn happen often.. btu usually turning off and back on after a few mins sorts it... well temporarily whilst you investigate the why and hows lol

Mike

 

[gazjones]

if you want to check it on vag com mate just let me know and we can have a look if there was any fault codes!

 

[Bogwoppit]

Are you all up and running with a laptop and VAGCOM now?

 

[gazjones]

yes mate its all working now

 

[Bogwoppit]

Drop us a pm gazjones and i'll pop round sometime.
Thank you

 

[ibizacupra]

you get a +ve or -ve deviation error?
not uncommon.......

check requested vs actual.

high load (4th or 5th, full throttle from low rpm is worst case %load)

 

[Bogwoppit]

Sorry to sound stupid but what is a +ve or -ve deviation error?

 

[ibizacupra]

Sorry to sound stupid but what is a +ve or -ve deviation error?

its your likely fault code which is dropping your car into limp mode.

+ve deviation is achieving more boost than its requested, and -ve is failing to achieve requested. Assuming MAF & other components are healthy its a potential mapping issue or failing component/leak since mapping was originally done.

VAG-COM needed to look see at fault codes and do some logs (block 115 for boost request and actual)

 

[gazjones]

+ or negative boost either boost leak or over boost which it what causes limp mod basically to much boost so ecu goes into safe mod so it dosent do any damage!

 

[gazjones]

no fault codes came up and i did a log or actual v requested and a maf i can spot any problems but its different map to mine and different turbo!
Group A: '115 Group B: '002

[code]		
	RPM	Load	Absolute Pres.	Absolute Pres.		RPM	Load	Inj. On Time	Mass Flow
TIME					TIME				
STAMP	 /min	%	 mbar	 mbar	STAMP	 /min	%	 ms	 g/s
0.27	1760	88	1570	1300	0.04	1720	87.2	11.07	29.47
1.07	1840	103.8	1950	1410	0.67	1800	98.5	13.12	35.94
1.86	2000	114.3	2000	1560	1.47	1920	109	14.76	42.39
2.67	2120	126.3	2060	1700	2.27	2040	120.3	16.4	49.39
3.46	2280	139.8	2050	1890	3.07	2200	133.1	18.45	58.06
4.17	2440	153.4	2010	2070	3.87	2360	147.4	20.5	70.19
4.87	2600	163.9	2000	2230	4.57	2520	160.2	22.55	80.33
5.67	2800	154.1	1990	2120	5.27	2680	163.2	23.37	81.47
6.88	3040	148.9	1980	1990	6.07	2880	148.1	20.91	80.03
8.07	3280	148.9	1970	1980	7.67	3200	149.6	21.32	91.64
8.87	3440	147.4	1950	1970	8.47	3360	148.9	21.73	94.42
9.57	3560	144.4	1950	1950	9.17	3520	146.6	21.73	96.31
10.27	3720	141.4	1950	1920	9.97	3640	142.9	21.32	98.08
10.97	3840	142.1	1960	1940	10.67	3800	142.1	20.91	102.94
11.67	3960	142.9	1970	1940	11.27	3880	142.1	20.91	104.42
12.47	4120	142.9	1950	1940	12.07	4040	142.1	21.32	108.53
13.27	4240	144.4	1960	1930	12.87	4200	143.6	21.73	114.11
14.07	4400	145.9	1960	1940	13.67	4320	144.4	22.14	118.33
14.87	4520	146.6	1950	1950	14.47	4440	145.1	22.96	124.08
15.57	4640	145.9	1950	1940	15.17	4560	148.1	23.37	129.14
16.28	4720	147.4	1940	1930	15.88	4680	147.4	23.78	130.39
17.18	4840	148.1	1950	1930	16.67	4760	147.4	24.19	135.64
17.99	4920	147.4	1930	1920	17.57	4880	148.1	24.6	137.42
18.66	5040	147.4	1940	1910	18.37	5000	147.4	25.01	140.44
19.37	5120	146.6	1950	1910	18.96	5080	147.4	25.01	142.53
20.06	5200	144.4	1960	1890	19.76	5160	145.1	24.6	143.08
20.68	5240	144.4	1970	1870	20.36	5200	142.9	24.19	141.19
21.46	5320	140.6	1970	1880	21.07	5280	141.4	24.19	141.94
22.26	5360	139.8	1980	1870	21.87	5360	140.6	23.78	143.78
22.97	5440	136.8	1990	1850	22.67	5440	137.6	23.37	142.81
23.67	5520	135.3	2010	1850	23.37	5480	136.1	22.96	143.28
24.46	5560	133.8	2000	1830	24.07	5560	133.8	22.96	141.11
25.17	5600	132.3	2020	1830	24.77	5600	132.3	22.55	141.86
25.96	5680	130.8	2030	1810	25.57	5640	131.6	22.55	142.89
26.68	5720	130.1	2020	1800	26.27	5680	130.8	22.55	141.86
27.59	5800	128.6	2000	1790	27.06	5760	129.3	22.55	142.86
28.28	5840	128.6	1980	1770	27.87	5800	128.6	22.14	142.86
29.07	5880	127.1	1940	1770	28.67	5880	127.1	22.14	144.08

 

[Bogwoppit]

Thanks for that Gaz, can somebody please translate!

 

[Essex_Cupra]

if their was a fault their it will log it on the ecu and come up when you do a scan

if you reset it though by disconnecting the battery it will not be their

How long do you have to disconnect the battery for the ECU to re-set?

Like a minute or hours!

 

[gazjones]

about 10 mins i think

 

[Bogwoppit]

I'm not sure, do a search or create a new post. My car sorted itself out without an ECU reset