Hi All

Recently I have noticed on my wife's x trial that acceleration is almost non existent when driving the car until you get to about 2500 rpm at which point it seems to start to pull well. I have previously had to change the suction control valves on the car and also read about issue with throttle position sensor so dont think it is either of these.

Could this be a sign of turbo issues? Or should i be looking else where. The acceleration is not juddery so does not seem like a fueling issue.

Any ideas or test I can do to try narrow down the issue. Could it be the egr valve? Shall I have a go at cleaning that?

Thanks in advance

Change the fuel filter and the air filter and give the MAF sensor a clean first .Try that and see how you get on then report back.If it was the EGR then it's a fairly easy job to do even if it isn't that it might be worth cleaning anyway as it will need it eventually.

Hi Mattrsa,

Personally i would just put injector cleaner in the fuel (low tank full bottle) then give it a run up and down the M/way in a lower gear, this will give your injectors and pump a good clean and should be back to norm.
Your injector pump doesn't start to reach full pressure until at +2500 rpm so any slight injector blockage is seen at a lower rev range. Sluggish pick up and also your turbo will start to spool up at approx same point so all happens at once.

Give it a go?
Ian

Hi

From personal experience with the Di engine I would say this is down to the Maf, try cleaning it as already advised but if this does not work then just replace it. I know someone who also had the same issue as you, he cleaned his maf but the problem still persisted but after changing his fuel filter and suction control valves the problem still persisted, all in all it was a faulty maf sensor. Cleaning the sensor will not work 100% of the time but its worth trying it first before replacing it.

Cheers
Mike

This might help

https://www.youtube.com/watch?v=b4U_CGkS8ag

Thanks for the replies

As suggested i have been adding diesel cleaner to the last few tanks but the issue has persisted resulting the the car going into limp mode this morning.
Will look into the Maf sensor replacement as find t hard to believe that the suction control valve have failed again after just two years.
Anyone got any links on replacing the maf sensor?

Well I watched the video and disconnected the Maf while the car was running and it made no difference. Is that a definative test to prove the Maf is faulty or not working?

Is EML on if so get the codes read.

No engine light

Tooom it to the garage last time this happened and there was no fault code.

Old thread but did this problem ever get solved?
My xtrail is still feeling powerless under 2000rpm.
I haven't change maf and scv. Turbo and boost control valve has been changed.