"What have you been using for ECU modification? Very interested to hear more on this!"
The floks at Autothority Pitstop had written an ECU program for the 2.7 liter 217hp boxster. The program was customized for for a car that had a high-flow intake, headers and high flow cats. I had a chance to drive a 2000 2.7 that the mods and ECU tune and it was very fast, it seemed more responsive than 3.2 Boxsters I had driven.
So I decided to take the plunge and got the intake and exhaust mods along with the ECU tune. But whereas the other 2000 2.7 Boxsters with the tune never had a CEL triggered with the mods, mine did.
It may have been the cat efficiency on my 100-cell cats, the wiring when we extended the oxygen sensors, or even the location of the sensors along the exhaust stream, we are not sure. The folks at Autothority stood behind their work and put in a lot of time and parts to make it right.
In the process of getting my CEL to stay off, they really dialed in the chip tune for the stock 2000 217 hp boxster. As a result, my car is running better than ever. If all goes as planned, next monday I will get on the dyno I have used three times before to check on the state of the chip and exhaust mods to see what it says.
Ed