New D1 owner

leecatd8209

Member
Nov 20, 2020
6
2
77962
This is my Disco:



It's been a dream of mine for many years to own one, despite their reputation. I needed a dedicated 4wd to explore the coast for good fishing spots, and it seemed like the perfect time to make my dreams come true.

Since purchase I've done the following:
All fluids changed, new trans filter
Oil cooler lines
Swivel ball and front axle seals
Front pads and rotors
SS brake hoses
Front wheel bearings
Right bank exhaust manifold gasket, manifold to y-pipe gaskets
Cat back exhaust
Accessory belt
Upper and lower radiator hoses and overflow bottle
180* thermostat
2" Terrafirma Medium duty lift
LED headlight bulbs
New stereo head unit
Rear ladder install
Fuel pump to tank seal


I'm sure there are things I'm forgetting, but it's been quite the "little" project. I have two prevailing issues that I cannot seem to clear up:

1st - Especially after sitting it has a very high idle. If I reset the adaptive values it goes back to normal and idles fine. It's annoying to have to reset the adaptive every time I go to drive it

2nd - This is a little newer, but the trans has started acting funny, especially at low speeds. When starting from a stop at low throttle inputs it seems to jump in and out of gear a few times before it finds itself and takes off. Also recently it's developed a bit of a clunk/shudder/"event" when coasting to low speed from cruise. I don't really know how to describe it. I replaced the old fluid with Dex 6, and installed a new filter, there wasn't much junk in the pan when I took it down, and the fluid looked old-ish, but not
ancient. The current fluid looks nice and pink, no bad smells, no evidence of excessive clutch material, level is good checked idling in neutral when cold.

Any advice is greatly appreciated. Thank you in advance! 🍻🍻
 

Swedjen2

Well-known member
Sep 12, 2018
582
123
California
That's a nice looking rig.
Get an OBDII reader. I have a scanguage that reads eng. temp., RPMs, MPH, etc. + will read and clear most codes.
Mine is mounted on the steering column
As far as your idling issue, did you check the Idle Air Control Valve?
 

leecatd8209

Member
Nov 20, 2020
6
2
77962
That's a nice looking rig.
Get an OBDII reader. I have a scanguage that reads eng. temp., RPMs, MPH, etc. + will read and clear most codes.
Mine is mounted on the steering column
As far as your idling issue, did you check the Idle Air Control Valve?

I have an Ultragauge already, it works pretty well.

I actually replaced the IAC today, and the idle characteristics have cleaned up a LOT.
 

best4x4

Well-known member
Mar 1, 2015
533
51
Beaumont, TX
Check TC fluid level. Normally clunks in the drive line are either diffs, u-joints, TC, or just slack in the gears which when off throttle quickly can clunk as they catch. Idle Air Control Valve wise you need to make absolutely sure the hole where it sits = clean.
 
  • Like
Reactions: salvvia