I went to start the car today (854 Turbo) and it didn't start initially. I kept cranking and cranking and only when I put my foot on the gas did it start. As soon as my foot is off the gas it stalls. If I take my foot off slowly the car will idle very smoothly slowly dropping to well below 500 RPM until it finally stalls.

I thought this was really odd so I drove it down the street with one foot on the gas and one on the brake. I noticed that even at 40 kmph if I took my foot off the gas it would still stall. I drove back home and looked again and I can't figure what the problem is. The car seems to be perfect except for no idle whatsoever. From what I could tell performance still seemed fine and as long as you hold your foot steady the car doesn't idle rough.

I let the car warm up completely and it still wont idle. No codes set from the engine either.

My suspicion is there is no Air Bypass happening with the throttle closed but I am not really sure where to start to test this theory.

Does this sound feasible or does anyone have any other ideas? The car ran fine yesterday and I didn't go through any big puddles or anything.

Thanks in advance