[bencomer]

I was having issues with my 1998 Boxster (81K) losing power and stumbling at about 5100 RPMs. I have an EVO intake installed, and understand that the mass airflow sensor may get soiled since the EVO intake uses an oiled air filter. I cleaned the mass air flow sensor (MAF), and there was no change in performance. After reading the posts on this site and the renntech site, I determined that replacing the MAF was needed, and I found one for less than $200 delivered (as opposed to $588 at the dealer). The repair was simple and took about 15 minutes. There was an immediate change in the performance, and the car began running great right away. However, after running one day, the CEL light came back on. I disconnected the battery to reset it, and the light was off for a day and then came back on. The car is still running great and pulls strong to the red line, but the CEL is still on. What could be the problem? Thanks in advance for sharing your ideas.

Ben