Highpox1

I am attaching an EXCEL file I created using pages representing the various modules listed for a DURAMETRIC scan on a 997.2 (SD13 non-turbo). I found that sitting in your car, trying to decipher all the hundreds of monitoring options with your engine on was nuts. This way you can pre-pick the ones you need before hooking up. Honestly DURAMETRIC should have provided this list on line...


Now the question. Given this list, especially the Engine Module Actual Values, can anyone weigh in on which ones should I monitor if I was looking for a very small vacuum leak? I have no codes, but suspect this could be the issue. If you want to know the issue, please see earlier threads on a 911 surging problem...

Steve Weiner-Rennsport Systems

JMHO, but scan tools are not the right choice for finding the source of vacuum leaks; these can only offer the possibility of one by analyzing fuel trims.

We use a smoke machine to find vacuum leaks.

rusnak

Maybe "Correction Factor, Mass Air Flow Sensor".

But yeah, really a smoke machine or physical inspection would probably be better.

theiceman

Try the 997 forum. I'm sure the computer compensates for a lot of stuff.

Highpox1

Thanks guys- question on the 'smoke machine'. I've heard that before, but can you explain exactly how that works? I am thinking the car is idling in a garage (i.e. no wind), and a gentle layer of smoke is floated over the engine- and you watch the hoses and plenums for this smoke to be drawn in (other than the airbox of course)....? If that is the technique, I have a $15 cigar I can use this Saturday.....

09mageec