Hello,I own a 996TT from 2001.I did the upsolute chiptuning a few months ago,but sometimes the boost pressure stayed at 0.5 bar for a few seconds and then got back normal untill 1.2 bar.This only happened occasionally.One day I was driving and I couldn't get the boost above 0.5 bar for 1 hour,suddenly it was back to normal,I called the guy from upsolute and he told me it would probably be bad diverter valves,so I changed them with the stratmosphere ones..I have driven the car for a few weeks without any problems but today I had the same problem,boost didn't get over 0.5 bar..Could it be the MAF sensor (I cleaned it 2 weeks ago)..I don't get any warning lights at the dashboard either...Anyone knows what could be the problem??? Thanks....

 

dixie,

Send a PM or e-mail to PorschePhD (Stephen). He can answer your question.

 

Ok thanks,already send a message and problem will be solved...Thanks...

 

spark plugs?

 

Probaply not the sparkplugs ,most likely the upsolute chiptuning,because the problem with the boost pressure always fix itselves within the hour....

 

dixie,

Stephen is one of the best. Just don't tell him I said so.