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mikehzz



Member Since: 04 Sep 2009
Location: Springwood
Posts: 749

Australia 2008 Freelander 2 TD4 SE Auto Lago Grey
Momentary loss of power

After 257,000 kms, I'm finally having a problem with my motor. It still starts well and there is no problem when cruising along but while I'm accelerating and the revs drop due to the auto gear change, the engine seems to lag on power in the new gear. It's like a momentary dead spot for a few seconds. It is more pronounced when the motor is cold. Anyone had this problem?

Post #302748 15th Jul 2016 8:12 am
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Nodge68



Member Since: 15 Jul 2020
Location: Newquay
Posts: 1766

United Kingdom 2009 Freelander 2 TD4 SE Manual Rimini Red

I know this is an old thread, but there ware never any suggestions as to the cause of the issue.
Now my TD4 is mostly running at full power, after I replaced the damaged head with a low mileage replacement.
I've another issue, where the engine seems to drop off boost on the gear change (it's a manual). This results in an amount of engine braking taking place for a second or so, before the power comes in again.
I've also got a slight misfire when it's cold, but I think this is due to the continuing issue with air in the fuel supply line. I'm hoping a replacement genuine filter solves that issue, but this drop in power is there on every gear change, when I'm using some power.
Any suggestions?
Cheers. 2009 Rimini Red SE TD4. My daily driver.
Gone. 2006 Tonga Green i6 HSE.


Last edited by Nodge68 on 30th Dec 2021 10:14 am. Edited 1 time in total

Post #416250 22nd Dec 2021 5:05 pm
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Nodge68



Member Since: 15 Jul 2020
Location: Newquay
Posts: 1766

United Kingdom 2009 Freelander 2 TD4 SE Manual Rimini Red

Wow, over 800 views, and no responses. Anyone got any ideas on this? Surely this can't be an isolated case.
Big Cry 2009 Rimini Red SE TD4. My daily driver.
Gone. 2006 Tonga Green i6 HSE.

Post #416473 30th Dec 2021 10:13 am
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alex_pescaru



Member Since: 12 Mar 2009
Location: RO
Posts: 4640

Generally, such symptoms were consistent with (improper) EGR functioning and a modified air flow (restrictions) due to the deposits of soot and oil gases on the intake tract.
Mine started to do that and as soon as I've blanked the EGR all returned to normal.

Post #416474 30th Dec 2021 10:28 am
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Nodge68



Member Since: 15 Jul 2020
Location: Newquay
Posts: 1766

United Kingdom 2009 Freelander 2 TD4 SE Manual Rimini Red

Wow
Thanks for answering Alex.
As it happens, the EGR does have a blanking plate in place. However there's no soot or deposits in the intake system, as I cleaned it thoroughly when I reassembled the engine last year, its still spotless inside the intake now.

However I've managed to solve the issue I believe.

I've had a couple of hours with SDD in it today, doing various calibrations on the engine.
I've reset the fueling adaptations (it's had replacement injectors anyway), and also done a calibration on the throttle body, and air path calibration too.
The result is the issue has gone, or at least reduced to a normal boost drop off levels, rather than feeling like compressor stall on the gear changes.
I'm thinking that the throttle body wasn't calibrated when it was change (before I got it), so believe this was causing the issue.

I'll report back should the issue return.

For now, thanks. 2009 Rimini Red SE TD4. My daily driver.
Gone. 2006 Tonga Green i6 HSE.

Post #416501 30th Dec 2021 6:55 pm
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