Power Down, Economy Up

**Redback** · 17th January 2017, 08:40 AM

On our High Country trip, I noticed a slight lack of power from our previous trip to the same area and vertually the same route, once we were there I also noticed the economy was quite a bit higher also and once we disconnected the camper, the economy didn't really change at all, I assumed it might have been the fact that we had a leaking fuel filter, but after thinking about it, I don't think this was the case as I think the leaking fuel filter was a result of a stick taking out the water sensor on the bottom of the fuel filter and that happened a couple of days later, so I have ruled that out.

One thing I did noticed also was that turbo lag seemed a bit worse, it's always been there, but this trip was a lot worse, especially climbing and offroad, you really had to be on it all the time, climbing from Harrietville to Hotham was a right pain, getting off the throttle and then back on it was terrible, much worse than on previous times on that road(which I hate)

The only difference between this trip and the previous trip is we had the car serviced two days prior and we had mud tyres on, we have ruled out the mud tyres re-power loss, as we have the road tyres back on and the lack of power is still noticable, Kerry will know for sure this afternoon on her trip up Ousley this arvo, economy is still up a bit though from normal though on her to and from work trips.

Our average economy for the trip towing our 750kg trailer and fully loaded was 14.7l/100ks, that's almost 2l/100ks difference, but the biggest difference was it never went below 14l/100ks for the entire trip, even when we weren't towing, every day when we got back to camp, it read anywhere from 14.3 to 15.1l/100ks or there abouts, this compared to the previous trip where we got down to mid 10s on the freeway, this trip, it just hovered around the mid 14s.

So we are thinking it may be the EGR on it's way or the sensor, only because that's what used ot happen to the D2 when the EGR sensor or the turbo modutator used to fail, other than that, I have nothing.

**Disco-tastic** · 17th January 2017, 08:47 AM

Cracked inlet manifold? They are known to cause symptoms like that. Could also be a clogged/dirty MAF or MAP sensor. Best of luck trouble shooting!

**mr_squiggle** · 17th January 2017, 08:59 AM

Assume you've checked the usual, air filter and housing for blockages and the exhaust for a restriction like a big ding, turbo hoses have tight clamps etc.

**Redback** · 17th January 2017, 09:12 AM

Originally Posted by Disco-tastic

Cracked inlet manifold? They are known to cause symptoms like that. Could also be a clogged/dirty MAF or MAP sensor. Best of luck trouble shooting!

Cracked manifold never even crossed my mind, neither did the MAF or MAP, which was another issue with the D2s symtoms, will look at those thanks.

Originally Posted by mr_squiggle

Assume you've checked the usual, air filter and housing for blockages and the exhaust for a restriction like a big ding, turbo hoses have tight clamps etc.

Exhaust is fine, that was one of the things I looked at that while I was under the car as this was a previous issue we had, exhaust was recently replaced.

I will check the hoses again, as I haven't done this for a while.

We are going to a power upgrade and EGR blank and silicon hoses, so I want to rule all this out before we commit to the upgrade, no point in doing the upgrade if there is anunderlying problem.

Thanks guys.

**mr_squiggle** · 17th January 2017, 10:03 AM

Is it throwing any codes around the DPF? That's"could" be an issue if the car thought the DPF was partially blocked. Could also be if the DPF was actually blocked.....

Tombie · 17th January 2017, 10:32 AM

Doesn't have a DPF...

**Graeme** · 17th January 2017, 10:34 AM

My money is on a dirty MAP sensor as they knock the performance about quite a lot.

**vnx205** · 17th January 2017, 12:08 PM

Your title probably should read "Power Down, Consumption Up"

I thought you meant that the economy had improved until I read the whole post.

Sorry I can't help solve the mechanical problem, but I can probably help you with your grammar, spelling, vocabulary and expression.

Just joking!

Of course it doesn't really matter because if I read the whole post I can easily work out what you meant.

**Redback** · 17th January 2017, 05:00 PM

OK power must have been a bit to do with the mud tyres, Kerry reported that climbing ousley was as per normal, but economy is still pretty crap, rising to 12.9l/100 for the trip to and from work, normally it's low 11s.

Looks like I have some work to do this Friday and Saturday.

Thanks for all

the tips everyone.

**mr_squiggle** · 17th January 2017, 09:09 PM

Originally Posted by Tombie

Doesn't have a DPF...

Ah ha! Well there'll be no fault codes about that then.......

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