Sometimes when I start the engine it idles really rough for a minute or so then smooths out. This may happen when it sits overnight or when parking for 10 minutes or so and then restarting. The engine delivers great fuel economy (22.5 on my recent 900 mile trip non towing) . I saw on one of the other web sites there was a Tech Service Bulletin on this but I cannot find out what the TSB is. Where do you go to look up TSB's. This one is TSB 18-027-06 and I would like to read up on it before I go to a dealer. This is an 05 with 25,000 miles. I notice no smoke from the exhaust when this is happening.

 

there are 3 things that i know of, that can cause this. 1. need re-flash for cold start/white smoke on start up (could be just a band aid for the real problem). 2. one or more injectors leaking down overnight 3. bad pressure relief valve. if you're still under warranty, i'd have the dealer check the injectors and the pressure relief valve.

 

I just recently brought my buggy in for the same problem. They said the injectors were OK and did the reflash. It starts better and runs different than before. It feels like it has a pressure box on it...without the box installed. Also seems to run the grid heaters more often / at higher ambient temps.

 

LOL.... mine felt the same way after the re-flash, but the stutter on start up slowly came back (not as bad as before the re-flash, though), but it definitely started better and ran stronger after the re-flash.