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  1. Engine almost stalling at idle and then recovering

    Range Rover Classic
    I went to take the 93 SWB out for a drive today and a weird problem cropped up. It will start fine and after idling well for a couple of minutes it will start this oscillation where it seems like it is going to stall and drops to about 500 rpm, then recovers and comes back to normal for a few...
  2. Code 48 Madness - Idle Air Control Issues

    Range Rover Classic
    I am at my wits end with the IACM or stepper motor. I've had my RR for about 3 years and have done a litany of maintenance and repair work on it. The only issue I have not been able to conquer is the idle air motor. The symptoms of my issue are hard starting and rough/searching idle as well as...
  3. High idle speed.

    Range Rover Mark II / P38
    After sorting a number of substantial air leaks on my MY99 4.6 it now on start up revs to over 2000 before setting down. The air leaks have been there since I bought the car. Any ideas?
  4. Cataltyic converter red hot at idle

    Range Rover Mark III / L322
    Does anyone know what the normal operating temperatures would be for cat converters during idle? i measured mine today and got- Passenger side 450-495F Drivers side 360-390F Both cats glow at night in red I also have a persistent misfire code p1315 obviously on bank 1 given i have a glowing...
  5. Ignition timing & idle

    Range Rover Classic
    Ciao a tutti, ho una gamma rgover classic con 3.9 v8 ricostruita con una kent cam h 180 ... nuovo motore passo-passo oem e non ho perdite d'aria nella camera del plenum, manometro rover non ha codice difetto, il mio problema è nel cambio di marcia , quando stacco la frizione con poco gas il...
  6. Idle speeds

    Range Rover Mark III / L322
    Hi, I am experiencing problems with a 2011, 4.4 tdi, L322. It idles usually at approximately 850 rpm which seems rather fast. However, when slowing to a stop it occasionally drops to 850 rpm, then without touching the throttle increases to approximately 1100 rpm, making it difficult to bring...
  7. low idle & p0011 DTC

    Range Rover Mark III / L322
    I have replaced the camshaft position sensor but I am still getting this code, it is the only code shown after diagnostics, car runs fine except that sometimes the idle is too low it stays on the first line after 0, this is with A/C off with A/C it goes a bit higher to almost normal idle. has...
  8. RPM dipping on idle

    Range Rover Sport / L320
    Just had my timing gear all replaced by the local indie. Car runs great and a lot quieter but now when idling in traffic after warm-up, the revs will suddenly drop by about 200 then pop back up to idle at about 650-700. It's quite inconsistent, sometimes pretty bad to the point of the car...
  9. 5.0 poor mileage and idle hunt/fluctuation

    Range Rover Mark III / L322
    For a long time now, I have not been able to figure out this issue. I used to get pretty decent mileage, averaging about 16MGP. Now I get 10-11, and something is clearly wrong, but no real codes. I have a bad cat, constant P0420, which is probably due to a bad tune on that bank, related...
  10. High idle and popping issue - insight appreciated

    Range Rover Classic
    Hey there, I recently completed an engine conversion on my 1988 RRC from the old 3.5L to a 4.6L. In doing so, the ECU was converted to 14CUX Tornado with updated ignition coil and amplifier, with adjustable fuel pressure regulator from RPI. The engine appears to be timed appropriately, fuel...
  11. Annoying high idle surge at startup poll

    Range Rover Classic
    Hello all, Well, it's been a few weeks and Daisy (the '87 RRC I have referenced in previous posts/threads) has been running like a champ. I mentioned earlier the high idle surge (starts, runs up to about 1500, then idles down to 650-700 within 10 secs or so) that she does at every startup...
  12. 2003 with cold idle issues

    Range Rover Mark III / L322
    2003 BMW M62 Range Rover. When the engine hasn't warmed up and the colder it is, the more the symptoms show up. Rough idle, almost wants to stall. If you press on gas, it sometimes will stall or sometimes will rev up. If you put it in gear, the load will cause it to stall somwtimes. Sometimes...
  13. Idle, what is normal and what is odd??

    Range Rover Classic
    Today to got the first chance to actually drive the rig much since I installed the 14CUX ECU and got the cutting out issue resolved. When I start it up, hot or cold, I get an initial high idle of about 1500 RPM that then settles down to about 750 in 10 seconds or so, is this normal? I tried...
  14. Idle rev whine

    Range Rover Mark IV / L405
    Picked up my new 2019 RR supercharged about a month ago, drove away, by the time I got home and the engine and all fluids were good and warm, about 20 mins, it makes a annoying whining noise when I am idling at a stop. The noise will last for 30-90 seconds and will stop when when I drive off or...
  15. question about normal idle rpm

    Range Rover Mark IV / L405
    I have a 2013 HSE that I purchased used..... I think it idles high, where if I put into drive its almost like cruise control the truck will go forward without me touching the gas pedal...it seems looking at the gauge its idling in drive at approx 650 to 675 rpm... My real issue is when I come...
  16. L322 TD6: Cutting out, rough idle, won’t start

    Range Rover Mark III / L322
    Hi gurus I have switched from P38 4.6 to L322 (TD6 BMW Diesel, year 2003) a year ago. Happy with the ‘upgrade’ but misses the V8. The L322 has been running like a clock until a few weeks ago, where the problems started… Symptoms: I first noticed a brief loss in power/stuttering when travel...
  17. Rough Idle on start with check engine light (sometimes)

    Range Rover Mark III / L322
    I usually just scan the threads and can pickup invaluable information from all of you. I have been chasing this issue for a few months and would really appreciate some insight. 2004 Range Rover L322 When RR first started, it idles really rough. Sometimes the check engine light flashes and...
  18. Rough Idle on start with check engine light (sometimes)

    Range Rover Mark III / L322
    I usually just scan the threads and can pickup invaluable information from all of you. I have been chasing this issue for a few months and would really appreciate some insight. 2004 Range Rover L322 When RR first started, it idles really rough. Sometimes the check engine light flashes and...
  19. Rough Idle on Startup that has begun a full time problem

    Range Rover Mark II / P38
    Hey guys, Recently I had a rough idle on startup, which seemed to possibly be a cylinder missing. In the past as soon as I got some RPMs going it smoothed out and didn't return. Slowly over time the issue started to return when stopped at lights for a long period of time and such. Now it's...
  20. P38 High Idle

    Range Rover Mark II / P38
    Evening boys and girls, just picked up a 4 litre SE and it is idling at about 3000 revs, removed air intake and blanked it off into engine and she idles no problem, does this mean she is pulling air in from somewhere else or do I have a sensor gone, any help gratefully appreciated.
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