I have a 1998 land rover discovery that sticks on 2000 rpm idle/ changed iac valve/no help-ideas?

SOURCE: 1998 land rover discovery won't start

I just expiriance the same problems on my rover so i check it out and found that the engine spark fuse was out. I replaced the said fuse and their you go it started. You can find that fuse under the dashboard in the satellite 1 fuse box. it should be the 3rd one from the right. Good luck buddy hope that helps you out.

SOURCE: radio unlock code for 1998 land rover discovery

Give the dealership your VIN# and they will in turn provide you with an 'unlock' code. Input the code and you should have radio. If not, you will need to remove the radio and give the dealer the chassis # found on the case.

SOURCE: my land rover discovery is stuck in 4 wheel drive,

The discovery is as previously mentioned permanent four wheel drive.However the difflock/range lever in most suffers from lack of use and siezes all i had to do when i bought mine was plenty of WD40 and patience as i don't think it had been in low range or difflock from the day it was built.don't try to force it just spray it and let it soak then try keep doing this and it should free up if not it may be the selector grubscrew has worked loose just threadlock it and screw it back in.

SOURCE: WHERE IS THE FUEL FILTER LOCATED ON LAND ROVER DISCOVERY 2000

LAND ROVER DISCOVERY II DONT HAVE FUEL FILTER, ONLY HAVE PRE FILTER IN THE FUEL PUMP

SOURCE: 2001 land rover discovery II locate fuel filter and fuel pump

If you're standing looking at the rear of the vehicle, it's on the chassis rail on the right hand side rear wheel arch.