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The mkiv Supra Owners Club

uk spec supra. running lean then rich..


PHRsupra

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Hi i have a problem with a supra running lean all the time. Exept on wot then it bottoms out 10s on the afr. When starting the car hot or cold it afrs run upp to about16-17 on idle and around 15.5s on light cruise...

 

Enyone experianced this?

 

Ecu ok. tried a jspec ecu then it ran rich on idle... as expected since uk has larger injectors. But stable afrs. Then i thought it was the maf. But noooo

Maf ok.

Lamda ok

Fuelpump ok

12v mod done

No fcd etc hooked upp.

 

Car runs ok starts upp etc like stock

 

Starts out at 12-13 afrs. But builds slowly towards 16-17

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