Help with TD5 performance

**shack** · 31st August 2020, 12:43 PM

Originally Posted by TroyMortimer

So here are the results

Cold - Idle in Park

t	RPM	Road Speed	IAT	IAT mV	AAT	AAT mV	Fuel Temp	Throttle %	MAP kpa	MAF Kg/hr	MAF mV	AAP kpa	AAP kpa raw	WGM 1	WGM 2
0	802	0	15.5	3113	14.4	3181	14.6	0	100.6	72.7	2252	101.47	101.58	0	0
1	803	0	15.5	3113	14.4	3181	14.7	0	100.59	74.8	2246	101.34	101.45	0	0
2	801	0	15.5	3113	14.4	3181	14.7	0	100.6	72.7	2241	101.34	101.45	0	0
3	802	0	15.6	3113	14.4	3181	14.7	0	100.88	71.4	2236	101.34	101.45	0	0
4	798	0	15.6	3113	14.4	3181	14.8	0	100.6	73.1	2252	101.72	101.84	0	0
5	799	0	15.6	3108	14.4	3181	14.8	0	100.6	72.1	2230	101.34	101.45	0	0
6	798	0	15.6	3108	14.4	3181	15	0	100.5	72.6	2241	101.34	101.45	0	0
7	800	0	15.6	3108	14.4	3181	15	0	100.6	72.1	2236	101.72	101.84	0	0
8	793	0	15.6	3108	14.4	3181	15	0	100.59	72.3	2236	101.59	101.71	0	0
9	792	0	15.6	3108	14.4	3186	15	0	100.6	71.5	2230	101.59	101.71	0	0
10	794	0	15.6	3108	14.4	3181	15	0	100.6	72.4	2225	101.72	101.84	0	0
11	794	0	15.6	3108	14.4	3186	15.1	0	100.59	72.1	2230	101.72	101.84	0	0
12	788	0	15.6	3108	14.4	3181	15.1	0	100.59	72.3	2236	101.72	101.84	0	0
13	790	0	15.6	3108	14.4	3186	15.2	0	100.6	72.1	2230	101.72	101.84	0	0
14	786	0	15.6	3108	14.4	3186	15.2	0	100.59	72.3	2241	101.72	101.84	0	0
15	789	0	15.6	3108	14.4	3186	15.2	0	100.6	72.1	2230	101.72	101.84	0	0
16	778	0	15.6	3108	14.4	3186	15.3	0	100.59	71.4	2236	101.59	101.71	0	0
17	788	0	15.6	3113	14.4	3186	15.3	0	100.6	71.7	2225	101.34	101.45	0	0
18	780	0	15.6	3113	14.4	3186	15.3	0	100.31	73.1	2246	101.34	101.45	0	0
19	765	0	15.6	3113	14.4	3186	15.4	0	100.6	70.1	2198	101.34	101.45	0	0
20	779	0	15.6	3113	14.4	3186	15.4	0	100.59	72.1	2230	101.72	101.84	0	0

2000 RPM - Cold in Park

t	RPM	Road Speed	IAT	IAT mV	AAT	AAT mV	Fuel Temp	Throttle %	MAP kpa	MAF Kg/hr	MAF mV	AAP kpa	AAP kpa raw	WGM 1	WGM 2
0	769	0	15.1	3137	14.3	3186	18.6	0	100.6	71.1	2214	101.59	101.71	0	0
1	765	0	15.1	3137	14.3	3186	18.8	0	100.6	71.1	2214	101.59	101.71	0	0
2	765	0	15.1	3137	14.3	3186	18.8	0	100.88	70.9	2209	101.72	101.84	0	0
3	767	0	15	3137	14.3	3186	18.8	0	100.6	70.6	2209	101.34	101.45	0	0
4	767	0	15	3142	14.3	3186	18.8	0	100.6	71.6	2225	101.72	101.84	0	0
5	769	0	15	3142	14.3	3186	18.8	0	100.6	70.1	2198	101.34	101.45	0	0
6	765	0	15	3142	14.4	3186	18.8	0	100.6	71.1	2214	101.72	101.84	0	0
7	1583	0	14.9	3142	14.4	3186	18.9	18.76	104.39	196.8	3372	100.94	101.05	0	0
8	1746	0	14.9	3142	14.3	3191	18.9	2.06	107	165.1	3125	101.33	101.45	0	0
9	1636	0	14.9	3142	14.3	3191	19.6	6.6	105.55	167.8	3162	101.33	101.45	0	0
10	1747	0	14.9	3142	14.3	3191	19.1	6.88	107.01	182.4	3259	101.07	101.18	0	0
11	1822	0	14.9	3142	14.2	3196	19.1	8.05	108.75	189.4	3308	101.2	101.32	0	0
12	1918	0	15	3142	14.2	3196	19.1	9.11	110.78	200.7	3383	101.06	101.18	0	0
13	1942	0	14.9	3142	14.1	3201	19.1	10.99	111.09	210.1	3426	101.06	101.18	0	0
14	1921	0	14.9	3142	14.1	3201	20	10.56	111.66	208.3	3415	100.94	101.05	0	0
15	1969	0	14.9	3142	14	3206	19.3	11.21	112.53	213.3	3448	101.07	101.18	0	0
16	2017	0	14.9	3142	13.9	3206	19.4	11.87	113.7	220.5	3486	100.94	101.05	0	0
17	1959	0	14.9	3142	13.9	3206	19.4	11.79	112.83	214.5	3459	101.2	101.32	0	0
18	1971	0	14.9	3142	13.9	3211	19.4	11.21	113.41	215	3453	101.2	101.32	0	0
19	1974	0	14.9	3142	13.9	3211	19.5	11.23	112.54	212.5	3453	100.94	101.05	0	0
20	1982	0	14.9	3142	13.8	3211	19.5	11.21	112.25	213	3442	101.2	101.32	0	0

3000 RPM Cold in Park

t	RPM	Road Speed	IAT	IAT mV	AAT	AAT mV	Fuel Temp	Throttle %	MAP kpa	MAP kpa raw	MAF Kg/hr	MAF mV	AAP kpa	AAP kpa raw	WGM 1	WGM 2
0	769	0	15.8	3103	14.3	3186	23.8	0	100.89	100.71	70.7	2209	101.72	101.84	0	0
1	771	0	15.8	3103	14.3	3186	23.8	0	100.89	101	70.1	2198	101.59	101.71	0	0
2	1289	0	15.8	3103	14.3	3186	23.9	11.17	102.05	101.87	155.7	3098	101.2	101.32	0	0
3	2015	0	15.8	3103	14.2	3191	23.9	15	111.37	111.21	219.2	3491	100.55	100.66	0	0
4	2678	0	15.8	3103	14.2	3196	24	12.6	127.4	127.83	326.3	4008	100.28	100.39	0	0
5	2783	0	15.7	3103	14	3206	24	14.96	130.9	131.33	349.3	4078	100.27	100.39	0	0
6	2849	0	15.7	3103	13.9	3211	24	15.49	133.22	132.79	358.1	4116	100.14	100.26	0	0
7	2914	0	15.8	3098	13.8	3216	24	17.97	134.69	134.54	372.9	4159	99.9	100	0	0
8	2985	0	15.9	3093	13.7	3220	24.1	15.65	137.01	137.16	386.7	4191	99.89	100	0	0
9	3079	0	16	3088	13.6	3225	24.1	15.19	139.06	140.37	394.7	4234	99.64	99.74	0	0
10	3094	0	16.1	3084	13.5	3230	24.2	13.08	138.76	138.33	388.8	4213	99.9	100	0	0
11	2990	0	16.3	3074	13.4	3230	24.2	12.98	136.73	136.87	380.5	4181	99.8	100	0	0
12	2988	0	16.5	3064	13.4	3235	24.2	12.98	136.44	137.74	382	4186	99.77	99.87	0	0
13	2993	0	16.7	3054	13.3	3235	24.3	12.94	137.3	137.16	382	4186	99.9	100	0	0
14	2996	0	17	3044	13.3	3240	24.3	12.96	137.01	137.74	380.9	4186	99.9	100	0	0
15	3003	0	17.2	3030	13.3	3240	24.4	12.94	137.89	137.74	382	4191	100.01	100.13	0	0
16	3007	0	17.4	3020	13.3	3240	24.5	12.94	137.31	137.74	380.6	4186	99.9	100	0	0
17	3006	0	17.7	3005	13.2	3240	24.5	12.9	137.89	137.74	382	4186	99.89	100	0	0
18	3002	0	17.9	2996	13.2	3245	24.6	12.9	136.73	138.04	380.5	4181	100.01	100.13	0	0
19	3006	0	18.2	2981	13.2	3245	24.6	12.9	137.6	137.74	380.6	4181	99.9	100	0	0
20	3010	0	18.4	2971	13.2	3245	24.7	12.9	137.6	138.33	380.6	4181	99.9	100	0	0

Going for a Drive - Still fairly Cold

t	RPM	Road Speed	IAT	IAT mV	AAT	AAT mV	Fuel Temp	Throttle %	MAP kpa	MAP kpa raw	MAF Kg/hr	MAF mV	AAP kpa	AAP kpa raw	WGM 1	WGM 2
0	1640	30	17.9	3000	14.8	3162	33.2	7.06	114.87	114.41	175.5	3205	101.46	101.58	0	0
1	1680	31	17.9	3000	14.8	3162	33.2	10.39	116.62	116.46	191.4	3313	101.21	101.32	0	0
2	1803	32	17.8	3000	14.8	3162	33.3	15.26	122.73	122.29	211.1	3437	101.21	101.32	0	0
3	2170	33	17.8	3000	14.8	3167	33.3	33.34	148.97	150.28	324.6	3987	100.15	100.26	31.34	3095
4	2583	37	17.8	3000	14.6	3176	33.3	42.21	201.98	203.65	463.4	4428	98.7	98.81	30.23	2964
5	2764	41	18	2991	14.4	3186	33.3	51.73	228.79	229.32	529.6	4601	97.4	97.5	19.21	1857
6	3160	45	18.4	2971	14.1	3201	33.4	62.26	227.03	225.23	552.4	4655	98.18	98.29	16	1600
7	3075	50	19	2942	13.9	3211	33.4	67.8	231.11	231.65	554.4	4660	97.13	97.23	16	1600
8	3148	54	19.7	2908	13.7	3220	33.4	66.34	226.75	225.23	543.1	4633	97.13	97.23	16	1600
9	3419	57	20.6	2864	13.6	3225	33.5	100	225.88	227.86	556.9	4671	96.34	96.44	16	1600
10	3561	61	21.7	2815	13.4	3235	33.5	73.51	228.79	228.73	559	4666	96.86	96.97	16	1600
11	3151	64	22.8	2761	13.3	3235	33.5	55.2	215.68	215.03	514.2	4547	99.24	99.34	0	0
12	2282	65	23.9	2707	13.3	3235	33.6	5.96	155.08	154.66	258.6	3658	101.72	101.84	0	0
13	1125	62	24.7	2668	13.6	3225	33.6	0	110.5	110.62	97.1	2543	101.85	101.97	0	0
14	867	60	25.2	2644	13.8	3211	33.6	0	104.1	104.21	77.3	2300	101.6	101.71	0	0
15	822	57	25.5	2634	14	3201	33.7	2.53	102.35	102.46	78.6	2316	101.6	101.71	0	0
16	1698	56	25.6	2624	14.2	3191	33.7	11.61	113.71	114.12	179.4	3232	101.46	101.58	0	0
17	1752	54	25.7	2619	14.2	3191	33.7	13.61	122.16	122.58	194.4	3340	101.33	101.45	0	0
18	1757	54	25.7	2619	14.3	3186	33.8	14.06	125.06	125.2	198	3362	101.21	101.32	0	0
19	1765	53	25.7	2619	14.3	3186	33.8	14.57	125.94	126.08	199.9	3367	101.46	101.58	0	0
20	1770	52	25.7	2619	14.3	3186	33.8	14.74	126.52	126.66	200.4	3383	101.21	101.32	0	0

I thought it might be easier to open the google sheet if you want to dig into the logs

TD5 Performance Results.xlsx - Google Drive

Going off this information (Defender & Discovery TD5 MAF logging with Nanocom | Empire Tuning)

At idle the MAF should be 55 – 61 mine is 71 on average
At 2000 the MAF should be 185 -200 mine is 219.5 on average

Looking at my results I feel the MAF has higher numbers

Should it expect to see the WGM working? on the cold drive it started kangeroo hopping. At least i can see values in that that column.

Thoughts?

I can't get to my computer for a couple days, but the log I looked at last night showed the MAF trailing the map readings, sometimes by a few seconds, sometimes it was too high, sometimes too low, whilst it's normal for there to be difference, the difference was too great , this should not happen.
As far as WGM goes,I don't know if the Nanocom one reads it correctly, it may, I just don't know, but yes the WGM should be doing something, but not when the car is stationary.

Cheers
James

**TroyMortimer** · 1st September 2020, 07:21 PM

For those interested.

I swapped over the the Cheap Chinese MAF with a VDO MAF.

RPM	Road Speed	IAT	AAT	Throttle %	MAP kpa	MAF Kg/hr
751	0	47	33	0	100.71	50.1
2047	0	42.6	31.3	6.31	115.58	186.4
2987	0	38.8	28.9	11.88	135.99	323

Seemed to fix the problem.

Thanks

Guys

**shack** · 1st September 2020, 08:09 PM

Good to know! Happy motoring

**Michail** · 31st August 2025, 11:52 AM

Hi all,
is a Nanocom1 a must for a Defender td5 owner?

**AK83** · 31st August 2025, 12:38 PM

Originally Posted by Michail

Hi all,
is a Nanocom1 a must for a Defender td5 owner?

I would say yes. Reason I say yes is that you ask the question, and the assumption on my part is that you would/could try to solve it yourself before seeking a mechanics help?

Another 'must' would be to have a good understanding of the TD5, in terms of what goes wrong. Generally a good motor, just a couple of annoying engineering choices that make simple jobs madly difficult.

How long have you had it, have you read through threads on either the defender forum of disco 2 forums. Good to go through older posts to see what usually fails, and be prepared for those issues.

eg. injector washers, injector loom, fuel pressure regulator(and more) that are regular issues that pop up. When you know about them, life with a TD5 is easier.

Nanocom is important for two reasons.

1. if you have, for example, a crank position sensor(CPS) fail. Only real way to find this out is via a nanocom. I haven't checked, but not sure if other diag devices can diagnose something like this(although I have a feeling some may!)

2. getting help from here(and or other sources). going back to the above example ... your TD5 wont start. You get onto the forum and post a help thread. Pretty much first question asked is something like "do you see any RPM values via the nanocom".
I know std Defenders don't have a tacho, so you may not know. There are other examples of how having a nanocom at hand will help with diagnostics.

Again, have a look through both defer and disco2 forums, look for some of the trouble threads, where folks have posted questions about their issues, you will almost certainly see a question where a member may ask for nanocom data like error codes or logs.

**Captain_Rightfoot** · 31st August 2025, 04:05 PM

Definitely check the loom.

My mechanic doesn't even bother testing the MAF. They just plug a new one in, and if it drives like a weapon they ask if you want to give it back.

**Campaspe Man** · 1st September 2025, 06:12 PM

Originally Posted by AK83

I would say yes. Reason I say yes is that you ask the question, and the assumption on my part is that you would/could try to solve it yourself before seeking a mechanics help?

I inherited a Hawkeye diagnostics unit, which so far I have been able to use to decent success. Any thoughts about these, compared to Nanocom?

Cheers,
Myles

**shack** · 1st September 2025, 07:28 PM

Originally Posted by Campaspe Man

I inherited a Hawkeye diagnostics unit, which so far I have been able to use to decent success. Any thoughts about these, compared to Nanocom?

Cheers,
Myles

Whilst the Nanocom is not perfect, it still has several features which make it a very handy acquisition for owners with TD5s.

The ability to record fuelling data is extremely handy for diagnostics, particularly for online use if the owner can't do it themselves.

Also the ability to upload a new tune to the ECU.

**Tins** · 4th September 2025, 06:22 PM

Not sure what a Nanocom 1 is, but the Nanocom Evolution can be a gamechanger if the TD5, or the ABS etc plays up. Probably gets more use on a Disco though.

**Tins** · 4th September 2025, 06:23 PM

Oh yeah, and bleeding brakes.

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