Hi Forum,
After the winter stand stil I realized that my 2,5 boxster 1998 had a hard time raving beyond 4000 rpm at load.
It has no hesitation, misfire or anything else and it starts idle and actually drives quite smoothly.
I notised hat I have two codes which keeps coming back P1123/25 Oxygen sensing limit adaption range 1 ( cyl 1-3) and ( 4-6)
Consequently we did put it on a Dyno , see photo below
were sad results, only 122HP at 5000RPM
The guy stoped the dyne run here explaining that it had sever fuel starvation.
( he had a probe in the exhaust, and I guess that he meassured it to be lean)
I guess that that matches the codes.
Is there any obvious places to look except for the fuel filter.
BR
KIm
barthol 
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