[Outback Porsche]

Originally Posted by RKDinOKC

I am NOT a happy camper, nope, not one bit.

Finally got the GTS back after taking freakin 3 months to do the heads, costing me almost 10 grand and its running rich and hunting at idle. Mech says the other GTS's he did GT cams on did the same thing and was fixed by using the Shark Tuner to tweak the fuel maps. I got a shark tuner so no problem.

Early Sunday morning I plug in my laptop thinking it's just a quick tweak away from burning up the tires at the autocross. It's so rich the computer is leaning it up as much as it can to run an AFR of 12. I tell it I have bigger injectors which should reduce the fuel significantly, and NO CHANGE. I have an adjustable fuel pressure regulator so I drop the fuel pressure significantly...NO CHANGE. I'm confused because either should have done SOMETHING. So I pull the pan off, pull out the sideband O2 sensor and do a free air recalibration. Put it back in and NO CHANGE.

Totally frustrated I upload stock fuel and ignition maps to the ECUs and adjust the fuel pressure to what I think would be as close to stock as I can without a gauge. ONLY while reaching the fuel pressure adjustment on the back of the motor my right arm is laying on the intake. It feels warm but not HOT. Well, I burned the &%!! of my arm. About a 3 inch diameter spot. Blistered and big enough the blistered skin sluffed off while I was holding it under the cold water tap. Looks nasty, but doesn't hurt. Been keeping aloe burn stuff on it.

Anyway, take car to local mechanic that installed the Shark Tuner and Wideband. I assume the wideband sensor is either shot, or settings are out of whack not knowing how long the wideband controller would keep it's settings with the battery disconnected during the cam job. To get the Shark Tuner working before the cam job my mech somehow killed 3 LH Programmable ECU modules, PEMs. After the 3rd PEM, Shark Tuner guys sent a known good LH brain. It seemed to work fine so I spent $500 on a new LH ECU brain. Well...Today instead of diagnosing an obviously bad O2 sensor on the wideband my mechanic tried to upload the fuel map he had made when tuning with the FIRST PEM HE FRIED. Guess what? The file fried the PEM?!? Seems that every single PEM that died, he uploaded the same map file. &%$#!!! freaking ^%$#@, why would you keep doing the same thing. I don't even know why the #@!! he tried to upload the stupid file, it was obvious the problem was being cause by the wideband and no amount of tuning would correct or even change it. In fact, I had just pointed out to him that the car idled great when you first started it. Right up until the wideband warmed up and started sending it's signal then it would go rich and start hunting.

The Shark Tuner guys found nothing wrong with my old brain and have told me this is the last PEM they are going to replace, and I specifically am to never ever upload ANY saved map files. Oh and to fix the Wideband and NOT the Shark Tuner. Grrrrrrrr.

Bugger Richard, I hope you come out of this okay (burnt arm and 928 recover quickly).