While driving along today, my 03TT turned off. I safely pulled to the side and had the car towed home. I scanned it with my durametric and found the code"P0261 - Porsche fault code 150 - injector circuit cylinder 1" (and similar for all cylinders.)
I could not find any info the code above, so I preceded to track this down assuming a fuel pump fuse/ relay / pump issue.
With the durametric, I can hear th fuel pump when activated, which I am assuming elimiated the theory above ( perhaps not )

I'm stuck at this point, any suggestions on how to proceed?
Thanks,

 

Ignition switch? Lots of keys on your key ring??

 

nope, just 1 key.

 

Still, go to NAPA, spend $12, get a new ignition switch and swap it out. If nothing else, you eliminate a very common cause of gremlins in the 996. Plenty of threads in here and the NA 996 forum about exactly how to do this.

 

+1 For replacing the ignition switch and check fuel pressure at the injector rail. A hose on the fuel pump may have split causing a loss of fuel pressure.

 

Thanks, I'll try these out tomorrow.

 

+1 one the fuel pump hose.

 

Not that familiar with the 996 electronics yet but most cars have a fuse for the injectors. I would check that first.

 

 

this is generic but it will give you a place to start

https://www.obd-codes.com/p0261

if your getting codes from all 6 injectors its unlikely it would be the injectors themselves. that would lean to an electrical not a mechanical issue

 

I tried the following with no luck
1. Looked at the fuel pump for a broken "U" hose - I took the cover of the pump housing off, looked at the hose, it looks fine. I did not pull the pump out.
2. replaced the ignition switch
3. 'jumped" the fuel pump relay - pump starts right away.

Still no luck.

Any further suggestions from here? I'm still following the of no fuel or no spark theory. is there a good DIY on checking fuel pressure/flow at various locations?
Thanks,

 

You could pop off the return hose while jumping the fuel pump relay, that would tell you if fuel was circulating.

 

Yes, before you move on you have check fuel is getting the injectors.

 

That code is an injector issue or wiring.

 

Well, that was a good thought. I pulled fuse C2 and - well it was blown. I popped in a new one - car starts right up. Now, the mystery is what caused the fuse to blow.