Is my MAF dead?

[truCido]

Right then as I've just got VAG-COM I obviously had to do some logging From my limited knowledge I'd say my MAF's up the duff but I'd like some second opinions please

**see thread below for logs **

 

[__B3NNY__]

My eyes .

Could you open it in excel and then copy and paste inbetween the code tags. If not send the file to me and ill do it for you.

[email protected]

Im not being a sarcastic arse its just alot easier to read.

 

[truCido]

lol yeah i know what you mean mate, I dont have excel lol!! will email it across now

 

[__B3NNY__]

Ignore that just changed the format and it worked fine

 

[truCido]

hehe thanks!

 

[__B3NNY__]

	Group A:	'003				Group B:	'115				Group C:	'118			
		RPM	Mass Flow	Load	Ign. Timing		RPM	Load	Absolute Pres.	Absolute Pres.		RPM	Temperature	Load	Absolute Pres.
	TIME					TIME					TIME				
Marker	STAMP	 /min	 g/s	%	 °BTDC	STAMP	 /min	%	 mbar	 mbar	STAMP	 /min	°C	%	 mbar
	0.89	1880	3.89	2.7	5.3	0.29	1920	10.5	990	1010	0.59	1920	24	0	1010
	1.79	1840	3.94	2.7	4.5	1.19	1880	10.5	990	1010	1.49	1840	24	0	1010
	2.69	1800	3.56	2.4	4.5	2.09	1800	10.5	990	1010	2.39	1800	24	0	1010
	3.59	1720	3.61	2.4	3	2.99	1760	10.5	990	1010	3.29	1760	24	0	1000
	4.69	1720	6.58	4.7	23.3	3.89	1720	16.5	990	1000	4.29	1720	24	0	1000
	5.59	1680	3.81	2.4	28.5	4.99	1720	19.5	990	1000	5.29	1680	24	0	1000
	6.59	1640	4.75	3.9	26.3	5.99	1640	9.8	990	1000	6.29	1680	24	0	1000
	7.59	1640	3.25	2	21.8	6.89	1640	15.8	990	1000	7.2	1600	24	0	1000
	8.49	1560	4.22	3.1	15	7.89	1600	13.5	990	1000	8.19	1600	24	0	1000
	9.39	1440	3.67	2.4	4.5	8.79	1600	14.3	990	1000	9.09	1560	24	0	1000
	10.29	1160	3.56	2.4	12	9.69	1280	13.5	990	990	9.99	1160	24	0	1000
	11.29	1880	4.08	3.1	28.5	10.59	1680	12.8	990	990	10.99	1920	24	0	990
	12.39	1840	4.89	3.5	29.3	11.59	1880	11.3	990	1000	11.99	1840	24	0	1000
	13.28	1800	6.33	4.7	29.3	12.69	1800	12.8	990	1000	12.99	1800	24	0	1000
	14.18	1840	15.28	10.2	29.3	13.58	1760	25.6	990	990	13.88	1800	24	0	990
	15.08	1880	16.17	10.6	30	14.48	1840	42.9	990	1020	14.78	1880	23	0	1020
	15.98	2000	20.14	12.5	28.5	15.38	1920	50.4	990	1030	15.68	1960	21	0	1050
	16.88	2120	37.19	28.6	15	16.28	2000	53.4	990	1070	16.58	2080	21	1.2	1100
	17.79	2360	41.06	28.6	14.3	17.18	2240	87.2	1180	1270	17.49	2280	20	1.2	1330
	18.78	2640	46.75	31.8	10.5	18.18	2520	91	1250	1340	18.48	2560	18	1.2	1350
	19.79	2120	36.06	28.6	16.5	19.08	2520	22.6	990	1280	19.38	2320	16	0	1100
	20.78	2280	55.28	98	6.8	20.18	2160	94.7	1700	1280	20.48	2240	18	95.3	1430
	21.68	2480	69.67	100	2.3	21.08	2360	125.6	2120	1730	21.38	2400	18	95.3	1860
	22.58	2720	85.64	100	1.5	21.98	2560	148.1	2300	2090	22.28	2640	18	95.3	2190
	23.48	3000	97.19	100	3	22.88	2840	163.2	2460	2330	23.18	2920	19	93.7	2390
	24.39	3280	103.78	100	3	23.78	3120	170.7	2460	2410	24.08	3200	21	83.5	2430
	25.38	3560	111.5	100	3	24.78	3400	170.7	2390	2450	25.08	3480	24	80.4	2440
	26.29	3840	116.19	100	4.5	25.69	3640	161.7	2330	2360	25.99	3720	27	80.8	2340
	27.18	4040	117.14	100	6	26.58	3880	155.6	2290	2310	26.89	3960	31	81.2	2300
	28.09	4280	121.92	100	7.5	27.48	4120	151.9	2230	2260	27.79	4200	34	80	2230
	28.99	4480	125.17	100	8.3	28.39	4360	149.6	2200	2190	28.69	4440	37	80.4	2180
	29.89	4720	131.11	100	7.5	29.29	4600	146.6	2130	2130	29.59	4640	39	81.2	2120
	30.79	4920	132.5	100	7.5	30.19	4760	144.4	2070	2090	30.49	4840	42	81.2	2060
	31.69	5080	134.81	100	5.3	31.09	4960	140.6	2000	2030	31.39	5000	44	81.6	2010
	32.59	5200	134.33	100	8.3	31.99	5120	139.1	1950	1980	32.29	5160	45	81.6	1980
	33.49	5360	132.31	100	8.3	32.89	5280	132.3	1910	1950	33.19	5320	47	81.2	1930
	34.58	5320	4.64	5.5	15	33.89	5400	127.8	1690	1910	34.28	5280	45	0	1440
	35.48	5160	9.89	7.5	15	34.88	5280	8.3	1000	1100	35.19	5200	39	0	1070
	36.48	5000	9.89	7.1	15	35.88	5080	9.8	1000	1050	36.18	5080	37	0	1050
1	37.38	4880	9.64	7.1	14.3	36.78	4960	9.8	1000	1040	37.08	4920	36	0	1040
	38.27	4640	8.67	6.7	14.3	37.68	4800	9.8	1000	1040	37.98	4680	35	0	1040
	39.27	4280	7.83	5.9	13.5	38.67	4480	9.8	1000	1040	38.98	4400	34	0	1040
	40.17	4000	7.67	5.5	13.5	39.58	4200	9.8	1000	1040	39.87	4120	33	0	1040

 

[__B3NNY__]

MAFs certinatly low,


What mods and map are you running?

 

[truCido]

Thanks for that.

Open green filter, Forge 007P, N249 Bypassed....Custom-Code

 

[__B3NNY__]

Might be worth giving the maf a clean before you shell out for a new one. ideally you should be looking for around 160g/s +/-

Everything else looks ok to me, but im no vag com geek

Your meeting and exceeding requsted boost, duty cycle looks good not hitting 100`s inturn means you have no leaks.

Little tip do one block at a time though its more accurate.

 

[truCido]

I did it in 4th from about 2k revs....went up to 5300! the bottom isnt the end, its a few lines above

 

[__B3NNY__]

Sorry i dont know if im coming or going today, i didnt scroll down

In that case the maf could be on its way out, or under reading. Get some solvent contact cleaner from maplins and give it a clean. I picked up a couple of g/s when i cleaned mine.

Try and get a redline run for a deffinate answer on the maf,

 

[truCido]

ok thanks mate, I ran out of room for doing runs lol not many places around here with enough room to do over 100 lol! Actually let me check the log I sent you...I tried a few runs will check if theres a bigger one in there somewhere.

Although to be honest it starts losing puff after that anyway so dont know if theres much point?

 

[truCido]

Right theres one in there upto 5500 however it starts going down from 5200 anyway

 

[__B3NNY__]

Im not to sure mate as ive never ready a stg1 log, so im not sure if the maf figures would peak early or carry on climbing even though the boost is starting to tail off?

What about the bypass`s leading from the M4 roundabout to basingstoke. Later the better obviously

 

[__B3NNY__]

If it starts to fall, id say duff/dirty maf it is then.

Does it feel down on power at all?

 

[truCido]

yeah the M4 / M32 is my next visit hehe

yeah it does feel as down, doesnt feel as perky as usual!! Will make a visit to Maplins tomorrow and try and clean it.

I might try unplugging it and see what happens, it should just overfuel a bit?

 

[__B3NNY__]

Yeh unplugging it wont harm on a short term basis. If it does feel down thats proberly the culprite.

 

[truCido]

Just unplugged the MAF and it would hardly idle?? And I got a Mass Air Sensor fault and the normal fault in ABS...as soon as I plugged it back in it cleared and idled fine

 

[truCido]

is the above normal??

 

[truCido]

Ok well I dont know why it idled like that but I just tried unplugging again and it was fine...anyway it seems to hold boost a bit longer and did see to go a little better. However I did pop a coil in 4 lol

I'm going to try someone elses MAF and see what happens