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LCR Boost/Power/Torque Issues

living2xs

living2xs

Everyday Im Shufflin'
Jul 18, 2010
46
0
Chichester & Kingston Upon Thames
Hey all,

I have been having a few problems with my LCR, its hard to explain but i have been getting what can only be described as feeling like kangarooing, if i press the accelerator the car feels like its surging (this is at low boost) sometimes when i plant my foot you dont notice it so much and the car will pick up and accelerate really hard, other times i will accelerate and there will just be a loud whooshing of air but nothing really happening and then wham the power will be back again! Its generally worse when the car is cold, some cold mornings i will go to pull away and you will hear the note from the exhaust change and get louder like the car is accelerating hard but really nothings happening, so i will back of the accelerator until i feel the car pick up again and then i can start accelerating (obviously not hard until the turbo warms up), could this be a boost leak? failing MAF? slipping clutch?

LCR 210 AMK

Mods before i got the car:
Stage 2 Revo MAP
Full 3" custom decat and exhaust
Forge 007p dump valve (serviced 2 weeks ago)
4 bar FPR

Mods I have added:
Badger5 3" TIP
Jetex Cone Filter with custom heat shield
Silicone crankcase breather, n75, dump valve hoses
Silicone hose from throttle body to inter cooler (charge pipe to inter cooler is still stock and feels squidgy when its hot, not sure if this could be a problem?)
Boost & Oil pressure gauges

I have replaced the N75 valve and was supplied with part number 06A 906 283 E, i wasn't sure if this was right because everyone seems to talk about the F valve being stock but i was definitely told this part number was correct as they used my reg to find it! The camshaft position sensor has also been changed

Also the turbo pressure will peak at 20 psi according to the gauge which i thought seemed a bit low

I was hoping someone might of experienced a similar problem or be able to advise me towards a solution, any help is appreciated, i have got some logs of block 002 which i will post up shortly :) Thanks Jack
 
Last edited:
jack02windsurfing


jack02windsurfing


JKM Dyno Print outs....

http://s1182.photobucket.com/albums...windsurfing/?action=view&current=IMG_0001.jpg

http://s1182.photobucket.com/albums...windsurfing/?action=view&current=IMG_0002.jpg
 
Code: 
Group A:	'003				Group B:
		RPM	Mass Flow	Load	Ign. Timing	
	TIME					TIME
Marker	STAMP	 /min	 g/s	%	 °BTDC	STAMP
	0	2680	23.28	13.7	33.8	
	0.5	2680	24.28	14.1	34.5	
	0.89	2720	24.53	14.1	33.8	
	1.41	2760	24.81	14.1	35.3	
	1.81	2800	38.69	24.3	33	
	2.21	2880	72.28	86.7	25.5	
	2.7	3080	120.14	100	14.3	
	3.1	3360	127.5	100	8.3	
	3.52	3600	133.92	100	7.5	
	3.92	3960	158.42	100	7.5	
	4.33	4120	167.28	100	9.8	
	4.81	4440	175.42	100	11.3	
	5.21	4680	183.47	100	9.8	
	5.63	5000	191.83	100	10.5	
	6.13	5240	198.89	100	10.5	
	6.53	5480	208.19	100	10.5	
	7.04	5760	210.11	100	12	
	7.44	5920	211.25	100	12	
	7.84	6160	213.28	100	12	
	8.24	6320	215.64	100	13.5	
	8.65	6480	220.86	99.2	15.8	
	9.04	6640	218.42	100	13.5	
	9.45	6760	216.78	100	12.8


logs of block 003...
 
Code: 
	Group A:	'002			
		RPM	Load	Inj. On Time	Mass Flow
	TIME				
Marker	STAMP	 /min	%	 ms	 g/s
	0.37	2880	60.9	4.76	33.42
	0.85	2960	72.2	6.46	46.33
	1.25	3040	97	9.52	65.31
	1.67	3200	129.3	11.22	95.97
	2.07	3400	173.7	13.94	138.06
	2.56	3680	191.7	18.36	144.06
	3.07	4040	191.7	19.04	157
	3.57	4360	191.7	19.72	170.69
	3.97	4600	191.7	19.72	177.08
	4.37	4800	191.7	19.38	183.58
	4.77	5080	191.7	18.7	189.53
	5.18	5160	191.7	18.36	194
	5.58	5480	190.2	18.02	199.17
	5.98	5640	189.5	18.02	202
	6.38	5840	178.9	17	203.94
	6.8	6040	172.9	16.32	207.92
	7.18	6160	177.4	16.66	207.56
	7.62	6320	177.4	16.66	208.89
	8.11	6520	174.4	16.32	209.56
	8.59	6680	169.9	15.98	210.22

Code: 
	Group A:	'002			
		RPM	Load	Inj. On Time	Mass Flow
	TIME				
Marker	STAMP	 /min	%	 ms	 g/s
	0	2520	109.8	9.18	57.58
	0.5	2680	121.8	9.86	66.53
	0.89	2880	142.1	11.56	91.69
	1.29	3080	182.7	15.3	128.64
	1.69	3320	186.5	16.32	109.17
	2.11	3560	191.7	16.32	135.5
	2.61	3840	191.7	17.34	138.81
	3.01	4080	191.7	17.34	163.31
	3.41	4360	191.7	20.06	174.39
	3.82	4600	191.7	20.06	180.61
	4.32	4920	191.7	19.04	188.28
	4.72	5120	191.7	18.7	196.78
	5.12	5320	191.7	18.36	200
	5.52	5560	191.7	18.36	202.33
	5.93	5800	191.7	18.36	204.28
	6.43	6000	179.7	17	205.92
	6.83	6160	175.9	16.32	208.56
	7.25	6320	173.7	15.98	208.25
	7.63	6480	175.9	15.98	211.92

Logs of block 002...

:confused:
 
anyone? i can do more logs if needed? im a student so i dont have loads of money to spend replacing parts, i have already run numerous vagcom checks and they have all come back clear! I know there are other people having similar problems but no one seems to of been able to stop the surging! I keep thinking it could be the MAF as the g/s readings seem low for a satge 2 map, any help is appreciated as i really want to get it sorted :)
 
Welcome to the club! Sadly not a club any of us want to be a part of but we'll get there.

I just replaced my MAF which was reading a max of 206g/s and is now 226g/s. The car feels smoother and more eager since this but unfortunately I have another issue causing hesitation which I think could be a leak.

You're not too far away from me so if my leak tester works then you;re more than welcome to use it on yours.
 
Thanks guys, i managed to get some more logs tonight but they are only in 3rd gear as there was too much traffic to try in 4th,

Code: 
	Group A:	'115			
TIME       RPM  Load	Absolute Pres.	Absolute Pres.
STAMP	 /min	%	 mbar	 mbar
274.75	2200	30.1	1010	1020
275.97	2280	60.2	1010	1050
277.18	2600	101.5	1610	1360
278.5	3360	188	2280	2190
279.9	4360	191.7	2370	2420
281.2	5200	191.7	2320	2410
282.42	5920	188	2250	2280
283.62	6520	173.7	2220	2220


Code: 
Group B:	'118			
TIME      RPM	  Temperature	Load	Absolute Pres.
STAMP	 /min	°C	%	 mbar
273.87	2200	23	0	1020
275.17	2200	23	0	1020
276.39	2400	21	24.7	1130
277.58	2760	21	95.3	1660
278.99	3680	19	71	2320
280.3	4640	19	78.4	2490
281.62	5480	21	78.8	2380
282.82	6080	24	78.4	2260


Code: 
Group C:	'002			
TIME    RPM	Load	Inj. On Time	Mass Flow
STAMP	 /min	%	 ms	 g/s
274.37	2200	31.6	2.72	14.64
275.57	2240	51.9	4.08	24.14
276.78	2480	87.2	6.8	47.11
278.1	3080	191.7	16.32	123.89
279.5	4040	191.7	17.68	153.89
280.8	4960	191.7	20.06	195.22
282.02	5680	191.7	18.7	213.61
283.23	6320	181.2	16.66	218.53


Logs of Block 115 & 118 as requested and also logged block 002 at the same time.
 
Last edited:
Partial logs in 4th gear, unfortunately not of the full rev range but its quite hard when your by yourself!

Code: 
Group A:	'115			
	RPM	Load	Absolute Pres.	Absolute Pres.
TIME				
STAMP	 /min	%	 mbar	 mbar
0.77	3120	182	2210	2160
2	3560	191.7	2290	2260
3.3	4040	191.7	2350	2280
4.7	4560	191.7	2330	2300
6	5000	191.7	2300	2270
7.31	5400	191.7	2270	2250
8.53	5720	185	2250	2240

Code: 
Group B:	'118			
	RPM	Temperature	Load	Absolute Pres.
TIME				
STAMP	 /min	°C	%	 mbar
1.18	3280	18	67.8	2240
2.48	3760	18	70.6	2250
3.79	4240	20	70.6	2270
5.2	4720	21	71.4	2270
6.42	5120	24	70.6	2280
7.73	5480	26	68.2	2250
9.02	5840	28	71.4	2190

Code: 
Group C:	'002			
	RPM	Load	Inj. On Time	Mass Flow
TIME				
STAMP	 /min	%	 ms	 g/s
0.37	3000	189.5	16.66	97.61
1.58	3440	191.7	16.32	130.86
2.88	3920	191.7	17.34	145.86
4.19	4400	191.7	18.36	167.28
5.6	4880	191.7	18.36	179.36
6.82	5240	191.7	18.7	193.64
8.11	5600	187.2	17.68	200.06

I did'nt realise that you get more accurate logs when you log each block individually so i can always do some more tomorrow? J
 
JamJay said:
Welcome to the club! Sadly not a club any of us want to be a part of but we'll get there.
Click to expand...

lol i feel honored :cry: im sure we will, i cant wait to drive again hesitation free! :D

JamJay said:
I just replaced my MAF which was reading a max of 206g/s and is now 226g/s. The car feels smoother and more eager since this but unfortunately I have another issue causing hesitation which I think could be a leak.
Click to expand...

I may have to try replacing the MAF just to rule it out, think it could still be the original so its done well to last this long!

JamJay said:
You're not too far away from me so if my leak tester works then you;re more than welcome to use it on yours.
Click to expand...

If theres no joy from these logs or with the MAF then i may have to drive up and see the tester in action! did you make it yourself?
 
I notice that your max g/s in 3rd gear is 218g/s, that is pretty high and a duff MAF wouldn't go that high I don't think. I couldn't get over 206g/s with my old one even though I know that previously and ith less mods I got 207g/s last year. New MAF...226g/s :)

I unplugged my battery and since then the hesitation has gotten worse, I think the the TB is not aligned right so that's a job for this weekend along with temp sender and leak test, I'll let you know how I get on.

I have made it myself yes, based on Robbie's guide :).
 
I might have a go at cleaning the maf sensor first, but it will always be at the back of my mind so will probably replace it!

Will be interesting to see if you find any leaks, I keep going back to have a look to see if I cam find any but no joy :(
 
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