s50 fuel consumption

[tyu333]

Hi guys

The guys with the s50 engined cars what's your fuel consumption? Mine is currently sitting on: 13.08 km/100L or 7.65km/L. I think it's running rich because of the strong smell of petrol after idling for about 30seconds.

 

[calypso]

I have an S50B30 sits on 12.8 with mainly city driving. Check the pipe that goes to the fuel rail.

 

[Nikhil]

My M50 325i is sitting at the same :fencelook:So yours must be light on fuel

 

[tyu333]

@calypso - It's more of an unburnt fuel from the exhaust, was thinking of taking it in for a dyno and get a co2 reading.

@Nikhil - Could your high consumption be related to a heavy right foot :fencelook:

 

[WyKiD]

@calypso - It's more of an unburnt fuel from the exhaust, was thinking of taking it in for a dyno and get a co2 reading.

@Nikhil - Could your high consumption be related to a heavy right foot :fencelook:

Think you spot on there...:rollsmile:

 

[Peejay]

@calypso - It's more of an unburnt fuel from the exhaust, was thinking of taking it in for a dyno and get a co2 reading.

Yes could be. My S50B32 is sitting at 9.8 mostly open road driving n cruising

 

[444YYY]

I have an S50B30 sits on 12.8 with mainly city driving. Check the pipe that goes to the fuel rail.

Mine sits at 12.0 (non highway).
Though the OBC under reads by 1l/100km. I've checked this numerous times on my car.
So actual is closer to 13l/100km.

 

[V'NOLAN]

mine is chipped, when i got it about a year ago it was 11.4 now i have the same issue with the fuel smell / burning rich and its +- 12.8

not sure if the chip can go faulty:flyfun:

 

[Nikhil]

@calypso - It's more of an unburnt fuel from the exhaust, was thinking of taking it in for a dyno and get a co2 reading.

@Nikhil - Could your high consumption be related to a heavy right foot :fencelook:

lol that might be possible, i like to get where im going :rollsmile:

 

[boost3d]

Have an emissions test done on the car, its possible that the hydrocarbon levels are a bit on the high side which could be as a result of your rear silencer being blocked ( bare in mind that if you still have the original exhaust that its +- 13 years old by now )

 

[Coupe Turbo GP]

The last time I checked mine was 8.9 litres per 100kms S50B32. It doesn't go over 10.5 or so with normal driving.

I drove down to dbn during the festive season and averaged 7.6 litres per 100kms according to the OBD :rollsmile:

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I also get a fuel smell when idling for a while. I still have the stock exhaust.

 

[tyu333]

Have an emissions test done on the car, its possible that the hydrocarbon levels are a bit on the high side which could be as a result of your rear silencer being blocked ( bare in mind that if you still have the original exhaust that its +- 13 years old by now )

Yeah i still have the original exhaust. The emissions test is it the same as a co2 reading done on a dyno?

Can a blocked silencer be unblocked or do i need a new one?

 

[Peejay]

Does the car feel sluggish?

 

[tyu333]

When i launch there's a slight hesitation(similar to turbo lag) but throughout the revs it's fine. Another thing is when I'm at a robot, the revs will drop to 500rpm and then go back to normal and this happens intermittently.

 

[tyu333]

Also forgot to mention that when I accelerate let's say from 1st gear and I take my foot the throttle at around 4500rpm, I hear a sound from the exhaust that sounds like there's a piece of metal bouncing up and down inside the exhaust.

 

[Peejay]

Check the CO's but also check the exhaust. Maybe somethings loose inside.

 

[GoCart]

Mine does not have a OBD but I recon it is about 11L/100km or so at the moment, I am doing a trip to Burgy in JHB this weekend and will do a top up with a decent calc.

 

[tyu333]

Mine does not have a OBD but I recon it is about 11L/100km or so at the moment, I am doing a trip to Burgy in JHB this weekend and will do a top up with a decent calc.

Thanks, would really appreciate it.

After checking on the net it seems 10-11L/100km is the normal consumption. Tonight I'll do a diagnostic and check if the o2 sensors are fine.

Do anyone know where I can get an emissions test done?

 

[Metroid]

When i launch there's a slight hesitation(similar to turbo lag) but throughout the revs it's fine. Another thing is when I'm at a robot, the revs will drop to 500rpm and then go back to normal and this happens intermittently.

I've also noticed the rev drop thing. I thought it was the VANOS, or something. When I shift to 2nd I sometimes notice lag but it goes away when the car warms up.
Fuel consumption is about 8.5 highway at around 110km/h and about 12.0 in the city.

 

[tyu333]

After cleaning the ICV and the throttle bodies, and changing one of the O2 sensors, the car runs beautifully, but the idling is :yuck: and the consumption is now 16L/100km

Now I'm gonna strip the intake manifold again and replace all the vacum pipes.