sudden spike in consumption. help.

[CliftonH]

Hi guys.

Firstly apology for not posting in a while so busy with financial year end. :thumbdo:

I need some advise please. Last week thursday I filled my tank with sasol as I always do. I drive 100km a day with 4 people in the car. Consumption has been on 7.2l per 100km for ever. Drops to 6.8l when I drive alone and increases to abt 7.4l if I drive fast. But from thursday after I filled it just kept rising from 6.8 to 7.4 then 7.8 then 8.0.

I have not done anything different. The only thing I can think is that I use the heater a lot more. But no aircon. I use the other switch its a circle with arrows next to the circle with the A inside it.

Can that cause the increase in consumption.

I have been driving 80km on 6 gear at abt 1600revs for 2 days now to drop the consumption. Managed to drop it to 7.3l. But scared if I drive at 120km again it will increase.

Also driving this slow seems wrong. I feel as if the clutch is not right as I am changing to quick. Not sure if I am crazy.

Any advise.

Service is only due in another 3000km.

This is a sharp increase.

I am totally confused. And no I never went over 120km since I filled up so no racing.

Any suggestions thanks.

Car is E90 320d.

 

[petrivanzyl]

:rollsmile:

:sorry:

 

[P1000]

I'd guess the filling station added paraffin to the diesel... Try another place.

It could also be the sudden drop in temperature.

 

[Dippies]

I'd guess the filling station added paraffin to the diesel... Try another place.

It could also be the sudden drop in temperature.

+1

 

[ChefDJ]

I'd guess the filling station added paraffin to the diesel... Try another place.

It could also be the sudden drop in temperature.

+1

+1

But bud that's really a minor increase. Not gonna affect your budget too much.

 

[CliftonH]

Hi. Please read and reply.
I noticed something. Its going to be a bit hard to explain so I hope u understand

There is a fuel consumption needle under the speedo rev counter. It goes from 0 to 20 on my car. As u drive faster it moves from 0 to 20. And back to maybe 5.

So when I am driving in the area if I brake slowly to come to a stop the needle moved from 10 towards 0. Usually it will end on 0 and only move again when I take off.

But now as I brake doing maybe 20 or 30km. It comes to 5. I am at a standstill now. The second the car is dead still the needle from 5 goes all the way to 15 and comes back to 0. Without me pressing anything.

It does this when I am rolling downhill also. If I go into second gear doing abt 20km. As I brake instead of it going to zero as clutch is in. It will increase.

It is like if I brake it goes higher and then comes down.

I hope I explained it properlly any advice why it would do this.

I hope it won't be something expensive to fix. I think this could be the reason for the increase in consumption.

Please any advise would be appreciated.

---

I'd guess the filling station added paraffin to the diesel... Try another place.

It could also be the sudden drop in temperature.

+1

+1

But bud that's really a minor increase. Not gonna affect your budget too much.

I use the car daily to work.

To give u an idea at 6.8l I get abt 900km to a tank.
At 7.2 I get abt 750km to a tank.
At 8.0 I was going to get abt 500km to a tank. I done only 350km and was below half tank.

That's a lot for every tank. If I was speeding I would say yes Its not bad. But driving normal.

Wanna hear something nice. When I bought the car in dec I was getting 5.9l per 100. Don't know what happen. Lol.

 

[Executer]

Clifton,

The needle is supposed to do that. I doubt anything is wrong with your car that needs fixing.

 

[CliftonH]

Clifton,

The needle is supposed to do that. I doubt anything is wrong with your car that needs fixing.

Hi thank you.

No usually if I brake it will decrease until I get to a dead stop it will then hit 0 and stay there till I take off then if will rise again.

Now it gives a jump high and come back down. But does this when car is standstill.

I never notice this before.

 

[cOlDFuSiOn]

My F30 spiked to 8.0 then it went in for a service and it's back to 7.5 avg daily in traffic and some spirited driving.. consumption seems right from my experience; then again promotec's sport/econo tune should let the car do better than stock in traffic from all the forum entries I have read in the past? My needle also just moves to 10 and then back haphazardly.. :thumbs:

 

[bmsportzn135i]

Maybe a carbon clean will help?
Its might be battling to breath!
Also check your air filters, if theyre really dusty, it could also increase your consumption!

 

[CliftonH]

My F30 spiked to 8.0 then it went in for a service and it's back to 7.5 avg daily in traffic and some spirited driving.. consumption seems right from my experience; then again promotec's sport/econo tune should let the car do better than stock in traffic from all the forum entries I have read in the past? My needle also just moves to 10 and then back haphazardly.. :thumbs:

I upgraded my software.

But I done that months ago and its been 7.2l since then. I also think maybe I need to service it.

---

Maybe a carbon clean will help?
Its might be battling to breath!
Also check your air filters, if theyre really dusty, it could also increase your consumption!

The consumption I can drop by driving slow. I went to meet gareth yesterday. Drove it fast rose by 0.1.

I'm worried why that needle is jumping.

---

Maybe a carbon clean will help?
Its might be battling to breath!
Also check your air filters, if theyre really dusty, it could also increase your consumption!

I am going to service it at the end of the month.

Its just frustrating to see if jump. Do u think it actualy uses more consumption when I am dead still.

 

[ChefDJ]

Could be dirty fuel, maybe change the fuel filter.

As for the needle, they all jump around like that bud. Nothing to worry about. Remember that needle shows true consumption at the time and the consumption is calculated in conjunction with distance covered as well.

If you stand still and idle the car for hours, the figures will go up to 99.99 litres /100 km because you aren't covering a distance.

 

[CliftonH]

Could be dirty fuel, maybe change the fuel filter.

As for the needle, they all jump around like that bud. Nothing to worry about. Remember that needle shows true consumption at the time and the consumption is calculated in conjunction with distance covered as well.

If you stand still and idle the car for hours, the figures will go up to 99.99 litres /100 km because you aren't covering a distance.

I have this weird thought that maybe the clutch is not releasing on time hence keeping that needle up.

I noticed this once before but it stopped.

Thanks guys.

Will try a service.

Throwing a bottlw of diesel boost today. Will be tramping weekend at kyalami will see from there.

I hope its not the garage. Cause its the only sasol near me. Or else must drive further to fill up.

 

[OppositeLockMT]

How often do you reset the consumption readings?

 

[CliftonH]

How often do you reset the consumption readings?

Hi. I reset everytime I fill up. Will be filling today so will rest today.

 

[Sabretooth tiger]

give Carbon doctor a call

 

[OppositeLockMT]

:thumbs:

I need to reset mine but I'm afraid of the numbers I might see.

 

[sash]

The issue you noticed about the needle jumping is normal, technically its not jumping at all, it is calculating the consumption based on the amount of fuel used when the car is moving( slow speed means it will use more fuel so it will hit high numbers quickly) mine goes to 20 everytime i stop then back to zero, once your speed is zero.

Not sure on your consumption, maybe the car got used to 1/4 mile races.,. lol and is prepping for this weekend.

 

[CliftonH]

The issue you noticed about the needle jumping is normal, technically its not jumping at all, it is calculating the consumption based on the amount of fuel used when the car is moving( slow speed means it will use more fuel so it will hit high numbers quickly) mine goes to 20 everytime i stop then back to zero, once your speed is zero.

Not sure on your consumption, maybe the car got used to 1/4 mile races.,. lol and is prepping for this weekend.

I had the biggest laugh now. I actually am going to start preparing after I fill today.

I must say I have never noticed this before. I promised. There was once but then it stopped. But seems like a few fanatics saying it happens to them as well.

I find it strange that it shud do that. I wonder if there is a technical reason.

 

[Quickie]

Maybe just in need of a good service.
Not sure if faulty or near its end glow plugs shoot up consumption?

maybe you just got a batch of crap diesel.
Could be lots of factors.

i would first service and then monitor consumption over at least 3 tanks before i would worry.

Are you loosing performance in any way?