boxster 98 codes p0300,301,302,303,304,305,306

[GREECE]

the car is owned in greece, a small country thousands miles away from most of you.it has 106.000 km. reading and all began when suddenly one day,check engine light came on,the car had a very unstable idle 800-1000,smelled a lot like lean burn,puffed some white smokes at times and had poor acceleration.we drove it to porsche local workshop,and they kept it some days and after the repairs they said that the problem was from something like a hose or gasket on the inlet plenum sucking air.it seemed that the problem had been solved but after a month,the c.e. came back with same codes.the maf sensor is new,and the injectors where tested and found ok.any suggestions?

[Loren]

All cylinders misfiring has to come down to one of the following:

wrong spark plugs

bad gas, plugged fuel filter, or fuel pressure too low

air intake leak

[GREECE]

A BIG BIG THANKS DEAR LOREN.THE PROBLEM HAS BEEN SOLVED,AND IT WAS BOTH FROM THE SPARK PLUGS,AND AIR LEAK FROM A SMALL RUBBER HOSE.NOW IT WORKS GREAT!!