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Loss of power


Glenlivet
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I've seen a few people mention this but never seen a definitive answer so here goes.

Following hard acceleration or when slogging up a long hill in a low gear my 02 TD4 has a 5-10 second "breather", ie whilst it doesn't exactly slow down it stops responding to the throttle and stops working hard. It then picks up again and runs as normal. No warning lights on the dash or black smoke. I wondered about a partially blocked fuel filter. I've seen a similar fault on a RAV 4 diagnosed as svc sensors but don't know if this translates to other cars.

The engine has done 107,000 miles and is otherwise spot on. No VCU problems and it's not gearbox related.

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I've had a similar experience with a loose connector on the fuel filter I think it was (mechanic hadn't clicked it fully home after doing a filter change), but that wasn't load-related just random wobble related. Behaviour was the same though, it just felt like the throttle pedal had been disconnected.

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I've had a similar experience with a loose connector on the fuel filter I think it was (mechanic hadn't clicked it fully home after doing a filter change), but that wasn't load-related just random wobble related. Behaviour was the same though, it just felt like the throttle pedal had been disconnected.

I think I'll start with a full service with filter changes and see what happens. It's not a big problem but would rather it didn't do it!

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  • 3 weeks later...
  • 4 months later...

Latest update. After full service with all filters changed including crankcase breather, no change. Diagnostics show a turbo fault, all the vacuum pipes changed, no change. Unplugged the MAF sensor, no change. Ok, it's a turbo fault.

MOT due so plug the MAF sensor (still the original) back in for emissions test, lo and behold fault cured!!!

I might yet change the MAF sensor but am loathe to bugger about with it in case it remembers about the turbo issue!!

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