Hi all. I have a Skoda Octavia Ambiente 1.9 TDi. The estate version, and it's a Y reg. Okay, that's out of the way. In the last couple of weeks I've noticed a slight drop off of power from the engine. It's most noticable when climbing uphill or trying to overtake. It's not a total loss of power, just about 15-20% or so, but I don't know why. The car seems to be running fine other than that, no noises, serviced last month and the like. I have to go uphill in a gear lower than I could before, ones I could accelerate up in 5th now I maintain speed up in 4th.

Now I don't know if it's just a case of the turbo not cutting in or something, I'm not terribly au fait with the performance on cars. The gears do seem to have a slack off period where the power from a gear seems to drop off a bit and then come back a bit later and in some cases it actually feels a bit like driving an automatic with it changing gears on you.

Does anyone have any thoughts on this? Anyone experienced this before? Anyone have any questions they can ask to help with this?

if its only been happening over the last couple weeks then it might be the heat.

Are you sure it's not just the warm weather? Cars will produce less power when it's hot.

Open the bonnet, take out the old air filter and clean the box out and put in a new air filter. Take a paintbrush or similar to the radiator and intercooler to remove bugs from it that have meet their death in them.

Make sure all levels, esp coolant are correct, as this will effect cooling.

Basically I would agree it's probably the heat, so getting in as much air as possible and keeping the engine as cool as possible are all you can do

If it is nearly a service time an oil change to clean oil can always help a little too.

The car was serviced just four weeks ago, a full service, so all the filters should be clean and new anyway. If you think it's just the heat then fine, but it does sometimes feel like I'm driving a different car.

A mate of mine with a 150bhp Golf diesel said he had a similar problem. He was driving in approx. 30 deg C heat, and felt the car was down on power. After a heavy rain the temerature dropped by about 6-7 degs and the power was noticably up.

I reckon the heat is the problem.

I dorve our Octavia yesterday evening and it felt much less responsive than it did befor ethis hot weather.

Normally, because of the power delivery (nothing then everything) it feels faster than the Z but yesterday ti felt quite sluggish.

Its th ehot weather, dont worry about it.

Solution: FMIC

Probably just the weather, esp if the car has aircon.

Okay thanks for everyone's responses. I'll put it down to weather, especially since I'm in Kent and have the aircon running constantly.

Okay. The hot weather has now passed, but my power hasn't come back. So back to the drawing board. Could there be something wrong with my turbo? How would I tell?

Have you tried giving it a decent run with busts of acceleration up to highish revs? This may clear things out.

good point, if you bimble about all the time the ecu goes into super lazy couch potatoe mode. give it death for for about 25mins and see if it improves at all

I drive 90 mile a day, just over half of which is on motorways usually doing around 85 or so. I'm not just pottering around in it.

I had a similar problem, this was when the car would not accelerate past 3000 rpm and the fault was a relay, which cost about

I had a similar problem, this was when the car would not accelerate past 3000 rpm and the fault was a relay, which cost about