I just want to share something I saw today when I have checked the Exhaust parameters saved on pdf files from this month.
Seems that fuel additive is injected into the tank even if I didn't refuel nor removed the cap of the tank. I knew that the additive is injected only when refueling.
The parameters from left are from 19th Aug and on the right from 26th Aug..
C5 X7 additive
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Re: C5 X7 additive
I’m not sure what you’re trying to say there that doesn’t look to be anything abnormal in the PDF read out.
The additive is only injected when you add fuel. When the car is stopped and ignition is switched off, the computer memorised the fuel level in the tank. Then when the car is started again, (whether or not you’ve opened the fuel cap or not, depending on system), it measures the fuel in the tank again and if it’s a higher level it calculates the difference and injects the right amount of additive into the tank.
The additive is only injected when you add fuel. When the car is stopped and ignition is switched off, the computer memorised the fuel level in the tank. Then when the car is started again, (whether or not you’ve opened the fuel cap or not, depending on system), it measures the fuel in the tank again and if it’s a higher level it calculates the difference and injects the right amount of additive into the tank.
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Marc
Marc
Re: C5 X7 additive
The pdf are fine, I'm just trying to say about the difference of 1ML of additive. I didn't know that additive is injected even if I didn't add fuel.
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C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
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XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow - x 5646
Re: C5 X7 additive
It’s not, that difference is because the amount of additive in the tank is only estimated. It’s not physically measured by anything.
The engine ECU receives the information on the amount of fuel put in the vehicle, via the BSI, from the following components:
Some will pre-emptively top the tank up at anything from under half a litre or less, but additive is not injected without fuelling,
The engine ECU receives the information on the amount of fuel put in the vehicle, via the BSI, from the following components:
- Fuel gauge
- Wheel speed sensors
- To determine the quantity of additive to be injected into the fuel tank
- To control the fuel additive pump
Some will pre-emptively top the tank up at anything from under half a litre or less, but additive is not injected without fuelling,
Please Don't PM Me For Technical Help
Marc
Marc