↓ Advertise on Defender2 ↓

Home > Td5 > Throttle position setting.
Post Reply  Down to end
Page 1 of 1
Print this entire topic · 
portal pat



Member Since: 05 Jan 2015
Location: South. Very south.
Posts: 32

Australia 2001 Defender 110 Td5 SW Fuji White
Throttle position setting.
Hi,
My 2001 TD5 110 has an annoying fault. In both low and high range it surges on a steady throttle from off idle to about 1500RPM. I can drive around it my modulating the accelerator but can be an issue offroad. Has been suggested to me that the Throttle Position Setting may be incorrect. ECU has had a tune by the way. Anyone throw some light on this?Cheers. Nothing suggests poor workmanship like wrinkles in the duct tape.
Post #629886 8th Jun 2017 10:08am
View user's profile Send private message View poster's gallery Reply with quote
bankz5152



Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 2049

2004 Defender 110 Td5 DCPU Epsom Green
Your MAF sensor could be dead and causing these issues, as could a boost leak.

I would check your MAF - If you have a Nanocom/Hawkeye air flow should read about 58 - 60 if its anything else your MAF is dead. Only replace with genuine, VDO or Siemens the rest arnt worth it.

I would also check any hoses for de-lamination, splits and cracks. I'd also check your intercooler isnt split. You should be able to tell either if there is oil blow by around a hose/IC

Could also be the MAP sensor.

Or it could be the hi-low switch swapping you between high range and low range maps...

Tbh im not 100% the throttle pot is adjustable.

Ideally you need to get it plugged into some diagnostics to check
Post #629898 8th Jun 2017 10:55am
View user's profile Send private message View poster's gallery Reply with quote
4RF RDS



Member Since: 19 Jul 2015
Location: Ottawa
Posts: 890

Canada 2000 Defender 110 Td5 XS CSW Epsom Green
What ^^^^Bankz ^^^^ said, get it plugged in and have the codes read... start there... Don't screw around with anything till you do. 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 #629970 8th Jun 2017 3:20pm
View user's profile Send private message View poster's gallery Reply with quote
roel



Member Since: 08 Aug 2009
Location: Lelystad
Posts: 2039

Netherlands 2003 Defender 90 Td5 PU Caledonian Blue
As you have a 2001 model you probably have the 2 potentiometer throttle instead off the 3 pot later models.
If one off the potentiometers gets a dead spot your ecu get's confused that is why the 3 pot throttle were introduced.

If you don't have a Nanocom or something like that you can check the working with a voltmeter.

I don't have my Rave disc with me so I have to do it by memory.

On your throttle you will have the following wires:

Supply voltage off about 4.5 V
throttle position voltage 0-4.5V
and one 4.5-0V
And you might have a earth cable

The 0-4.5V and the 4.5-0V should change smoothly if you slowly press you accelarator. If one off both is not smooth that might be the problem.

The easiest way to measure the voltage is on the ecu. But you will have to find the connectors. On the newer modells they are Black plug: 12,14,20,26,36. They could be the same on the old model ( but 1 less) but I am not sure about that. Roel

1984 90 2.5 na Diesel - RR V8 (1994-2001)
1997 Camel Trophy Discovery 300TDI (2001-2009)
2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts.
2003 90 Td5 (2009-now)
Post #630048 8th Jun 2017 9:03pm
View user's profile Send private message View poster's gallery Reply with quote
portal pat



Member Since: 05 Jan 2015
Location: South. Very south.
Posts: 32

Australia 2001 Defender 110 Td5 SW Fuji White
Thank you all for your input. Went to our local LR guru and hooked ECU to diagnostics. Throttle Position Sensor was on#2 instead of #3! Surging gone and motor feels generally more smooth and tractable. Cheers. Nothing suggests poor workmanship like wrinkles in the duct tape.
Post #630081 9th Jun 2017 2:35am
View user's profile Send private message View poster's gallery Post Reply
Post Reply  Back to top
Page 1 of 1
All times are GMT

Jump to  
Previous Topic | Next Topic >
Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Site Copyright © 2006-2024 Futuranet Ltd & Martin Lewis
DEFENDER2.NET RSS Feed - All Forums