TD4 Erratic engine revs

freelander fenit · Nov 29, 2011

Hi There,
When I start my Freelander td4, the engine reves are erratic (revs up/Down) after a few revs of the engine it settles down quite a bit. This will also happen when the engine is warm and restarted

Many Thanks

Singvogel · Nov 29, 2011

This sound like an air-flow or pressure problem.

air filter?
pcv valve? - dipstick test for pressure?
turbo boost control solenoid vent / filter?

If not these when was the fuel filter last changed?

freelander fenit · Nov 29, 2011

HI,
Replaced all filters about 10 months ago.
I HAVE DONE ABOUT 10,000 MILES SINCE THEY WERE CHANGED

Singvogel · Nov 29, 2011

freelander fenit said:
HI,
Replaced all filters about 10 months ago.
I HAVE DONE ABOUT 10,000 MILES SINCE THEY WERE CHANGED

Oh dear - that means that I'm stumped then - for the moment.

Much head scratching called for here.

Vissie · Nov 29, 2011

Lumpy idle could be LTB00052 related.

Possibly sticky injector - could leakback test it.

OldIrishWulf · Nov 29, 2011

freelander fenit said:
HI,
Replaced all filters about 10 months ago.
I HAVE DONE ABOUT 10,000 MILES SINCE THEY WERE CHANGED

I change mine every 5k.8k at most.
I had rev counter problems ,which turned out to be a CPS (crank position sensor).

OldIrishWulf · Nov 30, 2011

Is that Fenit in Kerry ?

freelander fenit · Nov 30, 2011

OldIrishWulf said:
Is that Fenit in Kerry ?

Ya its Fenit in Kerry

freelander fenit · Nov 30, 2011

I Decided to replace both fuel and breather filter for the off chance they might be clogged,
Thanks for your help, will let you know how I get on.

Slayer · Nov 30, 2011

Could also be the fuel pressure sensor. The one on mine had different nominal and real values and the ECU kept trying to compensate, hence the erratic idle and eventual stalling.

It was just a matter of cleaning it and adjusting the contacts. So far, so good

TD4 Erratic engine revs

freelander fenit

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