IT'S FIXED : IT WAS THE AIR MASS SENSOR !!!

YOU GUYS ARE GREAT !!!

I replaced the AMS and , voilą everything ok !

EPILOGUE : The air mass sensor has probably been deteriorating over the last couple months, asq witnessed by the increase in gas consumption, stumbling at idle and poor acceleration.

The system was correcting the failing AMS through the ECU software. When the battery was dis-connected, the memeory was lost, the standard reset values were too far off to keep the engine running.

Thanks to ALL who helped !

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I'de rather be flying !

Euro C240 Sport Wagon
69 Porsche 911E
76 Cessna Cardinal RG
47 Cessna C140