P1117, P1121, Po131, Po151, Po137, Po157 - 986 Forum - The Community for Porsche Boxster & Cayman Owners

root_werks · 02-01-2010, 06:29 PM

Thanks for the DME tip, I did find the website, yes, pricey, but 5 year warranty. Hopefully it isn't a DME unit.

I am running the CarCode OBD2 software which really isn't good for much of anything other than pulling the codes and clearing them. You can test the O2's which is nice, but I have noticed, the only O2 I can test is the one I replaced. Hmm, bank 1, position 1 is the pass, before cat right?

If that is true, maybe the 4 "new" ones installed just are not cutting mustard? I can smell it running rich at idle. Something isn't right. The one I did replace was direct fit Bosch from local parts store.

gschotland · 02-02-2010, 12:05 AM

Quote:

Originally Posted by root_werks

I am running the CarCode OBD2 software which really isn't good for much of anything other than pulling the codes and clearing them.

Sounds like a Durametric would be a worthwhile investment. I got mine (haven't had to use it yet), the non-pro version that can only be used for three cars, on craiglist for $170 with 2 car slots left. If you ever sell your car you'll probably be able to recoup at least half of the Durametric's cost. Good value IMO.

root_werks · 02-02-2010, 10:31 AM

I've been eye-balling the Durametric for a little while now. Seems like a really useful tool.

I stuffed my big head under the Box last night looking for a ground strap I could clean contacts on. Couldn't find it? Maybe it's on the topside? I'll check that part soon. I've read here and there about ground gremlins causing all sorts of bizzare issues.

AOS tests good (Oil cap test) and is only 4 years old. Never smokes, ever that I've ever seen or could smell. But running a little rich. Could still be 3 bad O2's I guess? It doesn't make sense I couldn't test them, only the one I replaced could I test through the software.

root_werks · 02-03-2010, 07:21 AM

I added a ground strap last night from the tranny to the chassis. I didn't clear codes or test drive until I went to work this morning. I should have cleared the codes (duh). Not that I think I fixed anything, but with each change I should test to see if it's corrected my large swath of codes.

I did notice the car seems to be a little smoother now. Especially when it comes to very lightly on-off throttle. It's not "jerky" anymore. Not like it was, but it's smoother.

So the ground strap did good, just how much I still have to find out.

paulv · 02-04-2010, 08:09 AM

Dan,

Go to here for essential documentation:

http://www.digital-kaos.co.uk/forums/f104/porsche-poses-2-42-install-cd-46838/

I couldn't get the system to install, but once the zip archives are unzipped, you can save all the English (EN) pdf's that are OBD2 related which contain troubleshooting information for all the codes -- stop searching in the dark and wasting your time!!!

BTW, don't ever clean a MAF sensor with soap/water -- CRC makes a spray cleaner for MAFs.

Regards,

paul

root_werks · 02-04-2010, 01:31 PM

Very cool, thanks Paul.

I wound up replaced the MAF after my "cleaning" which truly was nothing more than water, and not much of that either.

It wasn't the MAF at all.

I'm still hopeful the codes aren't being caused by bad wiring or bad DME.

Since I can test the O2 I replaced, but none of the others, I did order up 3 more from GRP. They should be here by the weekend. I know, I know, shouldn't just throw parts at it. But I think it's a good set of variables to eliminate.

I'll keep the updates coming. - Dan

paulv · 02-05-2010, 03:59 AM

Quote:

Originally Posted by root_werks

Very cool, thanks Paul.

I wound up replaced the MAF after my "cleaning" which truly was nothing more than water, and not much of that either.

It wasn't the MAF at all.

I'm still hopeful the codes aren't being caused by bad wiring or bad DME.

Since I can test the O2 I replaced, but none of the others, I did order up 3 more from GRP. They should be here by the weekend. I know, I know, shouldn't just throw parts at it. But I think it's a good set of variables to eliminate.

I'll keep the updates coming. - Dan

Bad/corroded wiring/connectors have their share of causing CELs to come on and should be inspected/tested with a good digital volt/amp/ohm meter (at least a 10 Mega ohm input impedance).

Regards,
paul...