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Tim2809



Member Since: 15 Aug 2021
Location: Dorset
Posts: 21
United Kingdom 
Hesitation on full throttle
Recently converted my 110 to a td5 10p
Bit of back ground first
Im running standalone power loom, standard tdi fuel tank and bosch 044 pump mounted 1ft from tank and then filtered through the tdi filter housing.
10mm pipe from pump to filter which is mounted under bonnet. Then 8mm from filter to fuel regulator connection
Immobiliser code generator to ecu.
Standard msb ecu. Believed its defender but now wondering if its a disco map on there
Starts instantly and drives but when accelerating it feels like its holding back.
Got absolutely no smoke at all.
The maf is disconnected currently but been told its only for egr which is not fitted.
Any suggestions greatly appreciated.
Post #922770 25th Sep 2021 4:10pm
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4RF RDS



Member Since: 19 Jul 2015
Location: Ottawa
Posts: 931
Canada 2000 Defender 110 Td5 XS CSW Epsom Green
Do you have an OBD plug? If so suggest you plug in to see if if has any codes? Also what gearbox and T-case are you running with it? 2010 Range Rover MkIII Autobiography Super Charged (Idris)
2003 Range Rover Mk III (Desmond FitzWilliam)
2000 Defender 110 CSW TD5 (CTX)
1992 Range Rover Classic (Lizzy)
1972 Series III 300 Tdi (Stanwood)
1967 MGB GT

Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats.
H. L. Mencken (1880 - 1956)
Post #922813 26th Sep 2021 12:28am
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Tim2809



Member Since: 15 Aug 2021
Location: Dorset
Posts: 21
United Kingdom 
Yes it has an obd port. No codes stored.
Its running td5 r380 box. Transfer box is my original 1.4. The high/low range switch wiring is bridged so thinks its in high range all the time
Post #922840 26th Sep 2021 9:28am
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ajps72



Member Since: 08 Jan 2012
Location: Lima Peru
Posts: 105
2001 Defender 110 Td5 SW Chawton White
Re: Hesitation on full throttle
Tim2809 wrote:
Recently converted my 110 to a td5 10p
- fuel tank and bosch 044 pump mounted 1ft from tank and then filtered through the tdi filter housing. 10mm pipe from pump to filter which is mounted under bonnet. Then 8mm from filter to fuel regulator connection
Standard msb ecu. Believed its defender but now wondering if its a disco map on there
Starts instantly and drives but when accelerating it feels like its holding back.
The maf is disconnected currently but been told its only for egr which is not fitted.
Any suggestions greatly appreciated.


Hello, I see some orange flags on your setup.
1.- the TD5 needs to get 4bar fuel pressure AFTER the regulator, usually 6 bar before it, perhaps your inline filter is loosing some pressure.
2.- The MAF NEEDS to be connected it doesnt control the EGR it measures the air flow and injects more or less fuel accordingly, if it is disconnected then it will reduce power and work on an standard map.
3.- Also check the Turbo pressure perhaps its low Augusto

Defender 110 TD5 2001
Discovery 4 TDV6
Post #922930 26th Sep 2021 11:42pm
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MadTom



Member Since: 10 Sep 2013
Location: Olomouc
Posts: 616
Czech Republic 1999 Defender 130 Td5 HCPU Baltic Blue
MAF is not really needet, TD5 is able to run without, but it is better to have a good working one. More important is MAP sensor in engine intake - working and CLEAN. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo Smile
Post #922939 27th Sep 2021 6:02am
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ajps72



Member Since: 08 Jan 2012
Location: Lima Peru
Posts: 105
2001 Defender 110 Td5 SW Chawton White
there is an important power difference between a good MAF and a cheap (only one filament) or bad one Augusto

Defender 110 TD5 2001
Discovery 4 TDV6
Post #923073 27th Sep 2021 6:05pm
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Tim2809



Member Since: 15 Aug 2021
Location: Dorset
Posts: 21
United Kingdom 
Going to order a vdo maf sensor. The tuner said it only needed for egr so actually running it disconnected wont hurt. Now getting conflicting advice.
Im getting good fuel flow after the regulator and the 044 pump is capable of 8 bar pressure if needed.
Post #923115 27th Sep 2021 9:10pm
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MadTom



Member Since: 10 Sep 2013
Location: Olomouc
Posts: 616
Czech Republic 1999 Defender 130 Td5 HCPU Baltic Blue
TD5 EURO2 engine is using MAP only to control the engine, EURO3 is using MAP and MAF, and in case of MAF failure it switch back to EURO2 strategy - MAP only.
Good working MAF or totally not working MAF is "OK" - engine is getting right or no output from MAF. Biggest problem is only partly working MAF outputing bad vaules - this is hard for engine to recognize between good and bad, and sometimest the engine management is confused, resulting in low power.
It is not uncommon to have MAF outputing low values. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo Smile
Post #923319 29th Sep 2021 5:41am
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4RF RDS



Member Since: 19 Jul 2015
Location: Ottawa
Posts: 931
Canada 2000 Defender 110 Td5 XS CSW Epsom Green
This is excellent information to know. Thanks for sharing Thumbs Up 2010 Range Rover MkIII Autobiography Super Charged (Idris)
2003 Range Rover Mk III (Desmond FitzWilliam)
2000 Defender 110 CSW TD5 (CTX)
1992 Range Rover Classic (Lizzy)
1972 Series III 300 Tdi (Stanwood)
1967 MGB GT

Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats.
H. L. Mencken (1880 - 1956)
Post #923393 29th Sep 2021 12:31pm
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Tim2809



Member Since: 15 Aug 2021
Location: Dorset
Posts: 21
United Kingdom 
So presume a 10p is euro 2 and 15p is euro 3.
The new maf arrived today so will get on and fit tomorrow and see if it makes a difference.
Post #923483 29th Sep 2021 6:22pm
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rallysteve



Member Since: 10 Feb 2014
Location: Cumbria
Posts: 2227
United Kingdom 2002 Defender 110 Td5 DCPU Keswick Green
My EU3 15P is totally gutless with the MAF unplugged! 02' 110 TD5 Double Cab Rebuild Thread
Post #923513 29th Sep 2021 7:34pm
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MadTom



Member Since: 10 Sep 2013
Location: Olomouc
Posts: 616
Czech Republic 1999 Defender 130 Td5 HCPU Baltic Blue
Yes, 15P is Euro 3. When tuned, the difference of good working and not connected MAF is even bigger. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo Smile
Post #923618 30th Sep 2021 7:49am
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Tim2809



Member Since: 15 Aug 2021
Location: Dorset
Posts: 21
United Kingdom 
Fitted a vdo maf sensor and its vastly improved it. Still not 100% as i would expect but im getting fault codes for no road speed as im running my old tdi cable driven speedo.
Post #923955 1st Oct 2021 6:45pm
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