I'm getting a bit fed up with this now! Just got the head on, and now I think my O2 sensor is knackered. As a guide on my AFM, the o2 reading normally cycles up & down on the led's. now I'm getting a stumble as i pull away (only seems to happen under low throttle) and instead of cycling, now sometimes it just sits at around 13.2 (I know the numbers aren't anything to go by) occasionally, and when I'm driving at around 30mph (just resting on the throttle), i have no LED's lit, and i get a very stuttering engine.

Any clues here? The plugs are coming out in the morning just to check, but I'm stumped.....

Thanks!

 

Yea, sounds like a bad O2. How's the car drive without it? Does it still stumble as you pull away?

 

dude, i think its definately the o2, i had the exact, exact same symptoms. It would like sputter on take off and things like that. So annoying. Yeah, im like 99% sure thats what it is bro. Change that. And you dont have to pay the 312 dollars it costs for the stock one. Get the universal one from partsheaven. Its only 50 bucks and if u dont want to change it, any porsche shop will. Just takes a little convincing them. They'll do it. Mine works great, no more sputters or anything.

 

Thanks guys,

I actually have the 4-lead one from Paragon, but I also still have a spare! I'll disconnect it today to see what happens, and if I need, I can replace it at the weekend.