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The mkiv Supra Owners Club

Really poor fuel consumption


GeordieSteve

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Bugger me ... is he still alive? havent seen him post here since God was a lad. Hows he doing?

 

yeah he's still breathing. he's playing with Novas and big dogs right now. He's rebuilt a Nova and put a 2L 16v engine in it, took it the drag strip and broke it :innocent: so he's still messin about with that and might be for the next few years at this rate :D

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Sounds like your o2 sensor is kaput , is your AFC wired up ?? if so then you are running in default setting , this would cause overfueling big time.

 

What are the default settings of the SAFC, is it ZERO?

 

If so, then are you saying that this is too rich anyway?

 

BTW: setting the SAFC to zero is straight forward.

 

- Go to Settings

- Go to Hi throttle

- For every rev mark (1000, 2000, 3000........7000) move the up and down arrow to zero the fuel correction.

 

Also check your Low- throttle settings.....you can zero these out too...

 

Mine was running rich on Sunday when I had it dyno'd, I have since zero'd out all the Hi Throttle readings...so it should be running Stock Maps on Hi throttle.

 

Under low throttle I am running negative fuel correction (this was there when i got the car) - so I am probably getting better fuel economy under low throttle (

 

Quite a simple and neat device....probably not good when youve got modified injectors etc....

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Don't zero it, remove it, they can cause trouble, isolate it as a possibility properly, by temporarily taking it out.

 

Ian: Just `cos I set it up doesn't mean I like the damned things :) I serviced an FTO, but it was done behind closed doors and not left in public view... ;)

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Don't zero it, remove it, they can cause trouble, isolate it as a possibility properly, by temporarily taking it out.

 

Chris.

 

I will ping you a seperate email to discuss this offline.

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