 | Home > Td5 > Cold Idle Issue |
 
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| rallysteve Member Since: 10 Feb 2014 Location: Cumbria Posts: 2227   
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My Td5 seems to have always had trouble with cold idle ever since we bought it 4years ago.
It usually only manifests itself in colder weather. When first started it fires straight up and ticks over nicely at what i would say is a fast idle. After a few minutes of idling the idle speed drops slightly and the idle becomes a little more uneven, not too bad generally if it has just sat at idle since started but with the bonnet open the varying tone is apparent. If the vehicle is driven from cold, when stopping at junctions the idle is really bad and i would describe it as 'chugging' where it is almost like it runs on 4cyl. This continues whilst stationary and you can actually feel the vehicle rocking slightly with the unevenness. It revs freely if you put your foot down and doesnt seem to suffer any other running issues. Once the engine had warmed up its fine and the idle is stable. Does anyone have any ideas? In the time i have had it, the following has been done , in addition to the usual service items, which has made no difference to the idle:
MAF changed (twice); MAP cleaned; Inlet and exhaust gaskets changed; Injector seals changed (several times) Injector loom changed (no oil at red plug); Fuel Pressure Reg replaced; Fuel Pump changed; De-catted and mid box deleted; Boost hoses and intercooler changed; Glowplugs changed; |
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4th Jan 2019 7:02pm |
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| excossack Member Since: 22 Feb 2012 Location: North West Posts: 5843 
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Crank position sensor? 1999 Defender TD5 110
Regards John M0VAZ Econet Station 48 no clock |
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4th Jan 2019 7:41pm |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5699 
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I think it’s fairy standard Td5 to be honest.
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4th Jan 2019 8:37pm |
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| rallysteve Member Since: 10 Feb 2014 Location: Cumbria Posts: 2227
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Thanks all. Although i agree it seems common, i am not convinced that it is normal. It seems a coincidence that everyone else who i have spoken to that has one that does it seems to be an early (pre 03) model. Maybe something in the ECU software was changed after that?
The CPS is a good shout. Never touched that, never did work out if it should have a shim or not! Cheers, Steve 02' 110 TD5 Double Cab Rebuild Thread |
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4th Jan 2019 9:02pm |
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| Dieseljock Member Since: 03 Jun 2017 Location: Inverclyde Posts: 31  
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Mines also suffers this same issue, never used to do it had the injector seals done years ago and the egr was removed at the same time. It’s pretty much done it ever since then. I’m fairly sure it’s temperature related as I’ve just fitted an electric coolant heater it was -7 here the other morning plugged it in for 20 minutes and it ran as sweet as a nut from the get go
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4th Jan 2019 10:24pm |
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| lightning Member Since: 23 Apr 2009 Location: High Peak, Derbyshire Posts: 2763
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Never had any cold idle issues with my 2004 Defender TD5.
It starts and idles steadily no matter how cold it is. My previous Defender (a 2006 90 TD5 bought new) was always fine, as was the 2003 TD5 SW we had for three years from 2014. |
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4th Jan 2019 11:39pm |
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| Nigelpugh7 Member Since: 18 May 2018 Location: Solihull Posts: 115
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Ours does it too.
We’ve done pretty much everything that the OP has had done, and it’s still the same. Ours is not cold weather or startup related though. It mostly occurs when we have been sitting at tickover for a while, which we do a lot on our off road course as we explain the various sections and hazards to the customer and each challenge. It doesn’t even seem to effect the engine once you have got past that initial chugging after being sat at idle for a while. We would just like to get rid of it if possible, so if someone finds a solution do post it please! Cheers. |
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5th Jan 2019 8:30am |
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| Super7 Member Since: 05 Feb 2014 Location: South Bucks. Posts: 132 
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My ‘99 is fine too.. '99 TD5 Defender 90 '52 Series 1 80" '99 Caterham 7 |
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5th Jan 2019 9:42am |
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| bankz5152 Member Since: 02 Feb 2017 Location: South London/North Kent Posts: 2166 
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Recently my 04 XS has been similar. In that when very cold it chugs as if only 4cyl and sometimes doesnt fire, then dies. Second turn of the key no issues. Instagram @defender_ventures
Empire Tuning - Agent |
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5th Jan 2019 10:30am |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5699
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Bankz, that doesn’t sound correct. Have you tried priming the fuel system first thing in the morning after it has sat all night. If not try it and check how noisy it is, then try starting.
Chugging when very cold is standard as the Td5 only has four glow plugs even though it has 5 cylinders. |
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5th Jan 2019 10:56am |
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| Alextd5 Member Since: 11 Feb 2017 Location: Gloucestershire Posts: 322 
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If it has the decat and egr delete it’s pretty normal. I know 4, 15p td5’s which all do it since these mods were done before and after a remap. If it’s standard without the mods I would probably be more concerned. As again I have a few 10p engines I know which are all Standard and one 15p which runs smooth no matter the temperature!
Might be worth checking the cylinder balance? |
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5th Jan 2019 12:23pm |
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| bankz5152 Member Since: 02 Feb 2017 Location: South London/North Kent Posts: 2166
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Balances are within range according to the nanocom.
Fuel system is primed and working well. Its only on very cold mornings, its garaged 90% of the time and starts fine in there. Also fine after sitting outside the yard at work all day. I think the glow plugs may need doing, just waiting for some time. Instagram @defender_ventures Empire Tuning - Agent |
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5th Jan 2019 2:03pm |
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| Alextd5 Member Since: 11 Feb 2017 Location: Gloucestershire Posts: 322
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Worth replacing the heater plugs for sure. But to my knowledge the td5 will fire without any heat! I had a 52 plate and the relay was faulty but no matter how cold it would start. But did puff white smoke! Until i fitted a new relay. Any white/blue smoke from yours?
I also know through work another Land Rover specialist who is  hot on td5’s. He mentioned once that the starter motor can interrupt the signal to the injectors which can cause the lumpy or rough idle once started. But I don’t think this is the problem in these cases. |
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5th Jan 2019 6:28pm |
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| bankz5152 Member Since: 02 Feb 2017 Location: South London/North Kent Posts: 2166
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It was worse before I changed the starter for a Brand new Denso. Crank sensor is a year old genuine one too. Soon as it starts it idles perfectly Instagram @defender_ventures
Empire Tuning - Agent |
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5th Jan 2019 8:25pm |
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