My cupra isnt boosting

[ChrisCurzon]

the map sensor is under the battery connected to a plastic pipe thats part of the intercooler system.

mine went after i had exhaust fitted which was done at chorley street garage

 

[footlong]

I suggested MAP sensor on this thread (or one the same some time ago) and no one takes any notice! M(ANIFOLID A(IR) P(RESSURE) sensor. get it checked fella!

 

[DaNnY_LaD]

how much is the map sensor?

And is it true that its to do with the boost acutal vs requested?

yeah footlong i told the lad that someone mention it,So he said find out were it is and check it..

 

[footlong]

Don't know where it is to be fair!!!!! the symptoms are similar to ones a mate with a focus st had. went on to find out it was the map sensor.

 

[DaNnY_LaD]

Found the MAP SENSOR does look battered/OLD...Looks like it been on there for a good few year...How much are they?

 

[PhilW]

A lot. Swap it for one that is known to work.

 

[ChrisCurzon]

yea think cost me £140 inc fitting from awesome when got mine done solved the problem though

 

[DaNnY_LaD]

What symptons were you gettin mate...Same as me ..?

 

[DaNnY_LaD]

Sorted sourced a Full working one for around a 10er

 

[footlong]

Let us all know if it sorts yer job out! everyone has had some sort of input on this thread!

 

[DaNnY_LaD]

Yup like a big Family

Looks like a real badger to fit tho...Mines all rusted...

 

[DaNnY_LaD]

What are the sypmton of MAP Failer or a faultly reading map..

Also...ive checked everything to do with overboost..

Now whats left to do is the turbo(VNT vanes) and MAP sensor..
Ive searched and people say the vanes sticked and cant adjust the boost levels as they get coated in oil ect...

Is there a way to clear this?By booting it all the time?
or just as the boost climbs let of the accelrator as it drops do the same again this right?

Also just read that i can spray some stuff in to the turbo but didnt say what or were?

Is it carb cleaner?wd40?

As my car has been used for motorway driving only...hence the mileage so could be sticky VNT vanes..
Also im gonna check the Shaft 2morro wen i get in from work...take the tip iff ect...What sort of play should be in the shaft...my turbo looks the orignal 133k in
As theres a fair amount of oil in my SMIC and Charge pipes...some part worse than others(nearer the SMIC) near the blades on the turbo its got oil on it..As my AEB tip i fitted was cleaned out and when i looked at it the inside of the tip was covered in oily residue..

Also if my SMIC pipes are full of oil could the map sensor be covered in it from inside...So miss reading

 

[DaNnY_LaD]

^^^^^^^^^^ anyone?

 

[beezasport]

you get a bit of oily residue in the pipes but not pools of oil, there sould be a bit of play in the turbo but you shouldnt be able to wiggle the shaft about. you'll know what i mean when you feel the shaft.

 

[DaNnY_LaD]

right bit of an update...

the other night i was tinkering up the bonnet when mork sugusted the SMIC...anyway i took top of the engine off (pipes,charger pipes ect)and refitted the tip made it more snug....and other pipes...and Cleaned the AIT sensor and nosed around

Anyway tonight was the 1st time ive drove the car since doin that...And 1st and 2nd gear it dosnt go limp at 3krpm it goes right round the rpm...but when u go in to 3rd gear when the boost pressure is high it goes to limp but when u let off the accel pedal it used to stay in limp mode...
This time it doesnt...Just cuts back then goes limp then comes straight out of it then boost then limp...like something is holding it back...ECu cutting the boost?
Only does it wen the boost pressure and turbo is really spooling...

So for the 1st time 2night i actual felt the kick in the turbo was really weird....
So its an improvment..

Ive orderd loads more silicone pipes and some 6mm acuator and n75 pipe and pipes around that area...
So gonna try and rule out a boost leak..

the MAp sensor hasnt come yet...So im kinda gettin there

 

[DaNnY_LaD]

Just took the SMIC pipes off and theres a pool of oil leading to the SMIC the pipe from the map sensor to the inlet the rubber one..

There shouldnt be that much oil surely..

gonna take the full smic off and map housing and clean it this weekend...What can u use to cleant he SMIC out...

JET WASH!??

 

[ttothec]

id say if there is that much oil then the turbo had probably gone at some point (not necessarily the one on it) and thats the cause of all the oil in the smic and pipes

if the original turbo did blow... then maybe it was replaced... perhaps with the wrong one?!?!

i know this is unlikely because of fitment issues... but not impossible

what other turbos might fit? maybe the BMW MAF was the only way to get it running with the wrong turbo?!?!

i am just speculating, and i really doubt this to be the case... but might be worth checnking it is a k03 on there

another thing ruled out if nothing else

 

[DaNnY_LaD]

Right today i spent

*Cleaned the top of the bay(de-greasing)
*Replaced all the vacs hoses
*Replaced Actuator hose's both to N75
*Re-fitted the Tip(made it fit better)
*Cleaned out the SMIC & pipes
*Cleaned MAP sensor and AIT senor
*Renewd EGR valve pipes
*Tightend all the Joiners(t-pieces with Cable ties)
*Checked ECU(Bone Dry/No moisture)
* Moved Air filter more over to the wing
* Check All codes again Via vagcom and only One came back(Overboost)
*Checked Shafted movement on the turbo(No movement up and down & only moves slightly in and out)

Right Its defo a K03 without a dowt as my Tip fits brillaint.
Ive also done some more Searching on other vag forums and can the Coilpack cut the boost?As it only cuts the boost when the pressure builds and then trys to hold..Also the TCL some time flickers,And it is hestiate at low rpm sometime,Pops abit from the exhaust too when you really rev it(only slightly tho)

Coilpack/spark plugs?

 

[PhilW]

Nice one mate...

Group A:	'115					Group B:	'118			
	RPM	Load	Absolute Pres.	Absolute Pres.			RPM	Temperature	Load	Absolute Pres.
TIME						TIME				
STAMP	 /min	%	 mbar	 mbar		STAMP	 /min	°C	%	 mbar
0.35	2200	27.8	950	1020		0.01	2200	15	0	1020
1.15	2200	30.8	950	990		0.75	2200	15	0	990
1.95	2200	45.9	950	1010		1.55	2200	15	0	990
2.86	2200	28.6	950	990		2.46	2200	15	0	1010
3.66	2240	53.4	950	1010		3.26	2240	15	0	980
4.46	2280	46.6	950	1040		4.06	2240	16	0	1040
5.26	2280	43.6	950	1030		4.86	2280	15	0	1030
6.06	2320	42.1	950	1020		5.66	2280	15	0	1020
6.86	2320	42.1	950	1010		6.46	2320	15	0	1020
7.66	2320	48.1	950	1020		7.26	2320	15	0	1010
8.46	2360	52.6	950	1050		8.06	2360	16	0	1030
9.26	2400	51.9	950	1050		8.86	2400	16	0	1050
10.04	2440	82.7	1320	1070		9.66	2400	16	0	1050
10.84	2560	127.1	1460	1620		10.44	2480	17	6.7	1310
11.64	2680	129.3	1460	2170		11.24	2640	18	1.2	1920
12.46	2760	54.9	1000	1250		12.04	2720	18	1.2	1900
13.26	2840	82	1000	1360		12.84	2800	15	1.2	1190
14.16	2880	69.9	980	1390		13.66	2840	17	1.2	1470
15.05	2960	73.7	990	1370		14.65	2920	17	1.2	1360
15.85	3040	76.7	1000	1420		15.45	3000	18	1.2	1390
16.65	3080	73.7	990	1420		16.27	3040	18	1.2	1430
17.45	3120	73.7	980	1430		17.05	3080	18	1.2	1430
18.25	3200	72.2	970	1440		17.85	3160	18	1.2	1430
19.05	3240	66.9	950	1410		18.65	3200	18	1.2	1440
19.85	3280	63.9	950	1310		19.45	3240	18	0	1340
20.76	3320	63.9	950	1310		20.25	3280	18	0	1300
21.66	3320	63.2	950	1300		21.24	3320	18	0	1300
22.54	3360	60.9	950	1290		22.15	3360	19	0	1300
23.35	3400	60.2	950	1270		22.95	3400	19	0	1280
24.15	3440	59.4	950	1270		23.75	3400	19	0	1270
25.05	3440	57.9	950	1250		24.65	3440	19	0	1260
25.96	3480	58.6	950	1260		25.45	3440	20	0	1250
26.77	3480	57.9	950	1260		26.36	3480	20	0	1260
27.75	3520	68.4	950	1240		27.26	3520	20	0	1260
28.55	3560	71.4	950	1420		28.15	3560	21	0	1370
29.35	3640	65.4	950	1390		28.95	3600	21	0	1410
30.15	3640	54.9	950	1290		29.75	3640	21	0	1340
31.05	3640	48.9	950	1200		30.65	3640	21	0	1220
31.85	3680	42.9	950	1120		31.45	3640	21	0	1150
32.65	3680	42.9	950	1110		32.25	3680	20	0	1110
33.45	3720	85	950	1640		33.05	3680	21	0	1210
34.25	3760	60.2	950	1380		33.85	3720	21	0	1470
35.05	3760	33.8	950	1130		34.65	3760	21	0	1270
35.85	3720	26.3	950	1040		35.45	3720	21	0	1070
36.65	3680	18	950	1010		36.25	3720	20	0	1030
37.54	3640	20.3	950	990		37.14	3640	20	0	1000
38.46	3600	36.1	950	1060		37.94	3640	20	0	980
39.34	3560	7.5	950	1010		38.86	3560	20	0	1040
40.14	3480	9	950	990		39.74	3520	20	0	1000
40.95	3400	9	950	990		40.55	3440	20	0	990
41.83	3320	9	950	990		41.43	3360	20	0	990
42.63	3240	20.3	950	970		42.23	3280	20	0	990
43.55	3360	138.3	1490	1660		43.03	3280	21	23.1	1000
44.34	3480	127.8	1470	2260		43.94	3400	24	1.2	2200
45.14	3520	59.4	970	1260		44.74	3520	22	1.2	1620
45.94	3560	76.7	950	1450		45.54	3560	21	0	1320
46.74	3600	69.9	950	1450		46.34	3600	21	0	1470
47.54	3640	69.2	950	1430		47.14	3640	22	0	1440
48.34	3680	68.4	950	1430		47.94	3680	23	0	1430
49.16	3720	69.2	950	1440		48.74	3720	23	0	1440
50.04	3760	66.2	950	1440		49.64	3760	23	0	1450
50.95	3800	66.9	950	1430		50.44	3800	24	0	1430
51.85	3840	65.4	950	1430		51.37	3800	24	0	1430
52.84	3880	75.2	1010	1530		52.34	3840	24	1.2	1480
53.75	3920	72.9	1000	1520		53.24	3880	24	1.2	1530
54.53	3960	72.9	1000	1520		54.13	3920	24	1.2	1520
55.33	4000	71.4	990	1520		54.93	3960	25	1.2	1520
56.13	4040	71.4	980	1520		55.73	4000	26	1.2	1520
56.93	4040	71.4	980	1530		56.53	4040	26	1.2	1530
57.73	4080	71.4	970	1540		57.33	4080	26	1.2	1530
58.53	4120	69.2	950	1540		58.13	4120	27	1.2	1550
59.33	4160	69.9	950	1530		58.93	4120	27	0	1530
60.13	4200	70.7	960	1540		59.73	4160	27	1.2	1530
60.93	4200	69.9	950	1540		60.53	4200	27	0	1550
61.84	4240	69.9	950	1550		61.33	4240	28	0	1540
62.64	4280	69.9	950	1560		62.24	4280	28	0	1550
63.44	4280	69.9	950	1560		63.04	4280	29	0	1560
64.24	4320	69.9	950	1560		63.84	4320	29	0	1550
65.05	4320	69.9	950	1560		64.64	4320	29	0	1560
65.84	4360	69.9	950	1570		65.44	4360	30	0	1560
66.64	4400	68.4	950	1570		66.24	4360	30	0	1560
67.44	4400	67.7	950	1540		67.05	4400	30	0	1550
68.34	4400	67.7	950	1540		67.83	4400	30	0	1540
69.14	4440	68.4	950	1550		68.74	4440	30	0	1550
69.94	4440	68.4	950	1550		69.54	4440	31	0	1550
70.74	4480	67.7	950	1560		70.34	4440	31	0	1550
71.63	4480	67.7	950	1550		71.23	4480	32	0	1550
72.44	4520	63.2	950	1510		72.03	4520	32	0	1550
73.23	4520	63.9	950	1480		72.83	4520	32	0	1480
74.03	4480	49.6	950	1280		73.63	4520	32	0	1430
74.93	4480	29.3	960	1090		74.53	4480	31	0	1230
75.83	4400	16.5	950	1060		75.33	4440	30	0	1080
76.63	4320	7.5	950	1010		76.23	4360	29	0	1030
77.43	4200	9	950	1000		77.03	4280	29	0	1000
78.32	4120	9	950	1000		77.92	4160	29	0	1000

Anyone notice anything strange about this log?

Driving normally requesting 990mbar and your gettin 1500mbar.

Something aint right, its building boost before you do anything, wastegate is sticking or something.

 

[DaNnY_LaD]

Well its strange sometimes i get 0psi mode and 5psi mode...
And comes out of limp mode if i rev it like fook to about 5krpm in 2nd then il change to 3rd and preston boost is back till the rpm climbs then limp mode..

Also when im in limp mode i can put the clutch at 30mph or at any speed and give it a few revs with the clutch in and then bring the clutch out and its out of limp mode

maybe phil right maybe the wastegate is open and closeing right

Aslo have a read off this...
http://www.boostvalve.com/1.8info.html