My car has had a rough idle at startup since Sat. morning at SITM. The day before I had a coolant leak I was battling during some serious driving. I found the coolant leak and repaired it that same day. The car ran slightly hot (slightly above the second line) but nothing major. Ever since last Sat. the car will run extremely rough and sometimes cut off until its warmed up. Usually about 30 - 45 seconds will do it. Then it runs as normal and very strong. Where should I begin looking. I haven't found a vacume leak but that is what I initially suspected as I did have to remove a vac. line or two to get the coolant hose replaced.

What controls the warm up cycle on the L-Jet?

Thanks

 

Hmm, interesting.

Until the vacuum leak is found or 100% confirmation there is not one, you will be chasing your tail. I learned that the hard way.

 

This may be either mixture lean for the temp, or extra air valve is not opening enough. See if cold running is better if you lift idle , or if it lacks power even then. If it lacks power, sounds like mixture is lean. Dont forget to reset idle once hot.
jo 83 Euro S AT 50k