|
I once had an issue with rough and low idle. Sometimes the car would even stall. So what I did was run Chevron with Techron concentrate through the fuel system and drive the car for awhile, then I changed the spark plugs. Be careful with this, because If your injectors are dirty, it can foul a plug.
This is why I suggest doing plugs after running the treatment. I also updated my DME to 2.41 with Rheingold 3.57 a year or two ago. The car runs awesome now. Idle and stalling has not been an issue at all. Not sure if this is the right path for you, but just suggesting. As for cold start, mine is a bit like that too, all of them are. As I still have my cats, I haven't gotten rid of it. Turner stage 2 software will remove the cold start cycle if your not a fan, but its only beneficial in your catless. Otherwise Stage 1 is good and will also update your DME to 2.40, which is the last update that had any fuel mapping adjustments.
Lastly, make sure your thermostat is good. If the car takes a long time for the engine to warm up, it could be a failing thermostat. I did mine just a week ago and the car is running much better. I think it had gone to a default map due to that. I had a code for the thermostat as well. So if you don't have that code, it won't likely be an issue. Also be aware that thermostat codes are intermittent, but a faulty or failing thermostat can cause poor performance.
Just wanted to offer an opinion bc the ICV is a rather expensive part and in my case, I did not need it.
|