Probee's GT2871R LCR

[wild willy]

His trims are positive, and the lambda says its running rich.

"Positive values indicate that the engine is running too lean and oxygen sensor control is therefore making it richer by increasing the amount of time that the injectors are open."
http://www.ross-tech.com/vag-com/cars/fuel-trim.html
With lamda readings, the higher the reading the leaner the mix and consequently the lower the reading the richer the mix. ie 0.78 is richer than 0.85 as an example.

 

[probee]

In a box on a shelf in a warehouse somewhere in America, probably, Aaron.


(I haven't got one)

hehe you bugger, sorry I forgot.

For idling issues i would use channel032 and not 031. could it be a split hose or vac pipe somewhere.

possibly.... Mass flow is right though so unlikely.

I'll have a poke around tomorrow/today now

 

[probee]

Right looking at todays logs i dont think im getting enough fuel... it definately looks dodgy at the top end although i dont think its going to blow to bits

Sunday	8	November	2009	12:46:29				
1ML 906 032 A  		1.8l R4/5VT         0001						
								
	Group A:	'003				Group B:	'031	
		RPM	Mass Flow	Load	Ign. Timing		Lambda Factor	Lambda Factor
	TIME					TIME		
MARKER	STAMP	 /min	 g/s	%	 °BTDC	STAMP		
								
	12.08	2960	50.22	33.3	30.8	12.49	0.977	0.961
	12.89	3200	60.56	30.2	26.3	13.29	0.938	0.953
	13.69	3440	48.42	22.4	31.5	14.09	0.969	0.969
	14.49	3640	55.19	25.1	33	14.89	0.953	0.945
	15.31	3840	62.25	25.9	33	15.71	0.922	0.922
	16.11	4040	70.31	27.1	30.8	16.51	0.852	0.844
	16.91	4400	156.83	99.6	12	17.31	0.766	0.797
	17.71	4880	190.06	100	7.5	18.12	0.821	0.789
	18.52	5360	195.22	100	9	18.92	0.766	0.797
	19.32	5840	218.75	100	9	19.72	0.828	0.797
	20.12	6240	233.39	99.6	9.8	20.52	0.844	0.797
	20.94	6640	244.81	99.6	10.5	21.34	0.883	0.797
	21.76	6160	0	7.5	7.5	22.14	0.75	0.883
								
	242.2	3360	21.14	13.7	35.3	242.6	1.008	1
	243	3400	23.06	14.9	36	243.4	1.008	1
	243.8	3480	29.36	17.6	36	244.2	1.016	1
	244.61	3560	29.83	18.8	36.8	245.01	0.93	0.961
	245.41	3800	92.06	99.2	21.8	245.81	0.836	0.821
	246.21	4200	161.81	100	9	246.61	0.821	0.797
	247.01	4680	164.72	100	11.3	247.43	0.75	0.774
	247.83	5160	194.94	100	8.3	248.23	0.75	0.766
	248.63	5640	214.31	100	9	249.03	0.805	0.789
	249.43	6080	232.33	99.6	8.3	249.83	0.828	0.782
	250.25	6480	243.39	100	10.5	250.65	0.867	0.789
	251.06	6880	243.86	97.3	14.3	251.45	0.844	0.789
	251.85	5360	16.11	9	4.5	252.25	0.906	0.938

ive never seen this much apaption before

Sunday	8	November	2009
1ML 906 032 A  		1.8l R4/5VT         0001	
			
	Group A:	'032	T7 B6
		Lambda	Lambda
	TIME		
MARKER	STAMP	%	%
			
	0	5.8	25

Sunday	8	November	2009	12:41:51	T7 B6					
1ML 906 032 A  		1.8l R4/5VT         0001								
										
	Group A:	'003				Group B:	'020			
		RPM	Mass Flow	Load	Ign. Timing		Idle Stabilization	Idle Stabilization	Idle Stabilization	Idle Stabilization
	TIME					TIME				
MARKER	STAMP	 /min	 g/s	%	 °BTDC	STAMP	 CF	 CF	 CF	 CF
										
	5.63	2360	32.64	22	27.8	6.03	0	0	0	0
	6.43	2520	35.06	21.2	29.3	6.83	0	0	0	0
	7.23	2720	46.47	28.6	28.5	7.63	0	0	0	0
	8.05	2960	57.78	29.4	26.3	8.45	0	0	0	0
	8.85	3240	69	32.2	21	9.25	0	0	0	0
	9.65	3520	78.94	31.4	22.5	10.05	0	0	0	0
	10.45	3920	142.72	100	10.5	10.86	0	0	0	0
	11.26	4440	165.56	100	9	11.66	0	0	0	0
	12.06	4880	180.61	100	8.3	12.46	0	0	0	0
	12.86	5320	202.69	100	9	13.26	0	0	0	0
	13.68	5720	216.94	100	9.8	14.08	0	0	0	0
	14.48	6160	227.61	100	10.5	14.88	0	0	0	0
	15.28	6360	202	32.2	0	15.68	0	0	0	0
	16.08	4800	17.08	8.2	3.8	16.48	0	0	0	0

once i saw the fueling we stopped logging, i wish i had got some more of IDC etc......theres obviously a problem somewhere, im not going to try to push it any further until things are sorted.

just in case my MAF housing is throwing it out i will be changing it ASAP

 

[DPJ]

 

[probee]

you like that adaption dave lol

 

[PhilW]

What size ID maf are you using and what size is standard? Im trying to work out the scaling.

Dumping in some extra fuel tho isnt it. Would that say that you might be using too big maf?

 

[probee]

The maf is a couple of mm over size Phil. The exact figures are in this thread somewhere. There were a load of logs done with a sleeve made to make it oem size. It wasn't until I got back to the original size that it ran the right figures. I think it just flows more than the standard maf so needs to be bigger to run standard figures???

I will be changing it to eliminate it.

It's worth adding that before starting logs today the adaption was at 15%, running logs for 20 mins pushed it very high.

 

[Wilko]

I don't know why its aiming for such a rich mixture (0.797). Adaption could be down to screwey fuel pump, or dodgy fpr. Your vac/boost connnection to the fpr could be leaking. The 5.8% is probably larger maf, the 25% is at its limit. Should be chucking a code.
Got mine back at last. Running in for the month though. Only 12lb of boost, creeping to 14lb at higher revs, and it's doing >300g/s at 7k with only 14lb boost. 2l is deffo the way forward.

 

[Skorchio]

Do you have a thread Wilko?

Fuling problem or not Aaron, its stiupidly fast!

 

[DPJ]

Got mine back at last. Running in for the month though. Only 12lb of boost, creeping to 14lb at higher revs, and it's doing >300g/s at 7k with only 14lb boost. 2l is deffo the way forward.

Spools a lot better, John?

 

[Wilko]

No thread as I'm too lazy and it's been going on for 8 years, 3 engines, 4 gearboxes, and I have to spend all day working.

Spools much improved dave 1 bar by 4100 vs 4600 on a 1.8. 1 baron a 2.0 is 13% more flow than 1 bar on a 1.8.

Pulls well from 3 grand where you needed 4 on th 1.8 to get any boost

 

[probee]

I don't know why its aiming for such a rich mixture (0.797). Adaption could be down to screwey fuel pump, or dodgy fpr. Your vac/boost connnection to the fpr could be leaking. The 5.8% is probably larger maf, the 25% is at its limit. Should be chucking a code.
Got mine back at last. Running in for the month though. Only 12lb of boost, creeping to 14lb at higher revs, and it's doing >300g/s at 7k with only 14lb boost. 2l is deffo the way forward.

I dont know John (good to see you on here by the way) i know Revo come on here, hopefully they will answer. Strange you should say about the FPR, listening to it today it sounded dodgy.... ive never heard them make a noise before.

TBH i didnt check the codes before shutting down the laptop but there was no CEL... i cant clear them anyway because it runs so bad pre adaption.

No thread as I'm too lazy and it's been going on for 8 years, 3 engines, 4 gearboxes, and I have to spend all day working.

Spools much improved dave 1 bar by 4100 vs 4600 on a 1.8. 1 baron a 2.0 is 13% more flow than 1 bar on a 1.8.

Pulls well from 3 grand where you needed 4 on th 1.8 to get any boost

Have you bored it? they must be wafer thin now, are you not worried. sounds awesome though buddy.

 

[Wilko]

83mm bore but 2.0 tfsi crank.
I'm surprised yours runs bad if you clear codes, as 5% on fueling shouldn't make it run too bad.
Look at the instantaneous adjustments to fueling, somewhere in the low blocks.

You must have a lot of other adaptions going on if reseting 5% fueling adaption throws you out.

 

[probee]

is that a straight swap then? How did you come up with that idea, have you had it on the rollers? did you do the work or have you found a decent garage

it sounds broken pre adaption, the single mass flywheel is so noisey and it just doesnt like to idle. if you unplug the MAF it settles so it will be good to see how it copes with the OEM MAF. there could be something going on with my TIP arrangment where a swirl is unsettling the MAF figures?

What blocks do you think are worth checking?

 

[Wilko]

The 2008cc conversion is common. Ina sells a kit. I can't remember which block instantaneous fueling is but it's one of the low ones.

 

[probee]

hehe i must live in the dark mate. i thought it was more boring then a crank change, ive never looked into it. it sounds like a very worth while addition though.

today is the first real time ive given the car some stick and its running fairly low boost. going by the air flow it must be around 330bhp and TBH it feels plenty fast enough for a FWD, yours must be unbelievable, do you get to use that extra power?

 

[Wilko]

All the time. Only drive it when the roads are empty. Got the dirty diesel for daily use. using it daily at the mo though to run it in

 

[probee]

i enjoy running engines in. its so much easier now i live 25miles from work. youll have to let me know how it goes when you finally get to plant your foot.

 

[wild willy]

Your logs look ok. You are running leaner than requested but as said REVO is requesting richer than normal AFR's during WOT. Best safe power is made at 0.85 lambda..... which you seldom exceed or go leaner than. My bet is that REVO are specing rich AFR's to reduce EGT's.

 

[probee]

Thanks for your input Carl

I wouldnt change from REVO for anyone but do you think they have shares in SHELL