Thanks to all of you who helped with suggstions. The issues seems to be resolved after a prolonged test of over 140 miles. (Remember that the warning came back on with a new MAF afer 70 miles) Thanks to to Simon of Hillcrest Specialist Cars for his preseverence. The fault codes list MAF, Throttle position adjuster and heavily soiled throttle body. The throttle body was removed and cleaned, although not particularly soiled at all, and replaced. This is all that was done and the idle is now correct at about 1050 cold and 900 warm, (at least I think so, but Lord Hamilton of Sith will soon correct me).
The only thing that bugs me is that in order to save a trip to Hillcrest I have had to procure a Torx t20 security bit to exchange the MAF for my original one. Why in the name of Jebus did Porsche in their wisdom use security fasteners, (i.e. with a central pin in the recess) to hold the MAF in place?
The only thing that bugs me is that in order to save a trip to Hillcrest I have had to procure a Torx t20 security bit to exchange the MAF for my original one. Why in the name of Jebus did Porsche in their wisdom use security fasteners, (i.e. with a central pin in the recess) to hold the MAF in place?