Carpokes

Anyone running a scs delta. I’m having an issue. Car was tuned. I have smoked test the all lines. When car warms up. My idle like to jump and down. Even worse when your driving and come to stop sign. Is there way to check or tap into the scs delta with laptop. Or anyone have any idea what can cause this I have check. Manifold. Vacuum lines. Check clamps etc. venture delte kit is on the car. New idle control vavle from Porsche Ngk plugs were in car. Now Bosch plugs. Any help or idea would be great thank you. also spoke to tuner said has no idea.

No experience with that ECU, but...there are so many things it could be - overrun fuel cut, icv control loop settings, bad tune...This should be the responsibility of whoever tuned it. Baffling they'd have no idea.

Though if you're game I'm sure you could have a look yourself: https://sxtune.co.uk/connectsxt.html

You'll need an old school serial port by the looks of it. Try to get one with an FTDI chip in it, just for ease of plug-and-play use.

Without knowing anything about that stand-alone, when the idle bounces up and down on a stock 951, it's usually a vacuum leak. The extra air causes the idle to go up until it goes over 1600 or so, then the dme cuts cuts fuel in over-run mode and the rpm's drop, and that cycle repeats over and over. If that's not it on your car, I'd be inclined to block off the ISV completely to see if it is the source of the problem. Getting it to work well under all conditions seems to be a recurring challenge with stand-alone systems.

Is that the idle control vavle how would I goon doing that. May I ask.

Pzito1 wrote: Thu Jan 18, 2024 7:50 am Is that the idle control vavle how would I goon doing that. May I ask.

Yes, sorry ISV=Idle stabilization valve in Porsche-speak. Just pull the hose off the tube between the first and second runners on the side of the intake, and block off the hose and the tube on with a couple of corks.