snoopster

My suggestions are: 1. Check for air leaks in intake air system. A loose or poorly fitted hose can cause all kinds of faults. Is this just the airbox to the engine or does this include the intercooler hoses as well? Is there anyway to pressure test these lines? 5. Go back to the tuner that flashed the car and flash it back to stock to rule out the a bad flash. I have no idea who the original tuner was. I'm almost 100% sure it was in CA and the car is now 1800 miles from there :)

*I have made this post @ 6speedonline forums as well* The original plugs were Bosch with only a single ground electrode. The plugs in cylinders 1 and 2, closest to drivers seat, were fouled the most, where as 6 and 5, closest to the passenger seat almost looked new. I cleaned the MAF following the instructions in the various forum posts twice. I took the airbox out and blew it out with air, with the MAF out, and put in a new OEM air filter. Today I took the car out and took 2 different Durametric logs. The first is with the MAF in. The RPM has been divided by 100 and the Boost (in Bar) is times 10 to fit everything on the Excel graph. So 88 boost is really .88 bar and 50 RPM is 5000. The misfire counters are true. In the first run I'm back to P0301 and P0305 errors. Cylinder 1 recorded 35 misfires, cylinder 4 - 1, and cylinder 5 - 8. The second run I have unclipped the MAF sensor. This yielded only a P0301, but I didn't punch it as hard due to the fact the P0301 came on so quickly.

I am a new Porsche owner who acquired a 996 Turbo with GIAC flashing running in the neighborhood of .9 bar. I had owned the car and had drove it hard for about 2 weeks when I swang around a corner and punched it in 2nd gear only to find out what a CEL looks like. I received a flashing CEL which yielded a P0301. I headed straight for the forums. After some research into the history of the car prior to my ownership I realized it was time for a coilpack and sparkplug replacement time. I was only able to get 2 packs in from my local shop, but got 6 plugs. I tore the car apart, replaced drives side front two packs, I believe cylinders 1 and 2 and all 6 plugs. These coilpacks had hairline cracks whereas the others were not that bad. Plugs were FR 6 LDC - Bosch Platinum 2. I cleared the CELs after every change. After a few drives @ wide open throttle I once again got CELs. This time P0301 and P0303 w/ P0300. I decided other coilpacks must be bad. I ordered in 4 more 997 part coilpacks, ripped the car apart again and proceeded to put in the new packs. I paid attention to the DIY guide here at RennTech and looked at the VarioCam brackets and they seemed to be ok. Once again, @ WOT I received CELs. This time P0303 and P0304 w/ P0300. After digging in the forums, I checked my MAF voltage, 1.4V at idle using a voltmeter and then ordered a Durametric and did a data grab on the MAF voltage and it seems to be ok. As I have been running 91 Oct w/ ethanol I then tried a gas change. I emptied the tank and put in 93 Oct. The car drove good for a bit, but yesterday once again @ WOT I got a P0305, P0306 w/ P0300 again. The car drives wonderfully if I keep the turbos out of the picture. I have used the Durametric to verify that I get no cylinder misfires when tootling around town keeping the boost below .3 bar. Does anyone have any suggestions on what I can do to fix this problem? I'm desperate for a working car! I am a novice owner and barely know how to work the Durametric but am willing to post and gather all logs I can from the device to solve this problem. The nearest dealer is 2 hours from my place! Thank you 6speed community for any input you can offer!