Quote Originally Posted by pbierre View Post
Is the fuel trim running lean? Is the idle choppy, but the engine smooth at higher RPMs? If so, it's likely getting unmetered air. Smoking the EVAP system is good, but you also want to check the 3 control valves...turbo boost valve, EVAP Purge valve, and EVAP Vent Valve. VIDA has a way to test these valves individually, which is very helpful if there is a problem with more than one valve.
I'm going after the evap system next. Since it's due for a service anyway. Is there a way to check these valves without VIDA? I've got an OTC scanner.
It's got the symptoms your explaining. It really stumbles on acceleration. But once warm idles good, fine at higher RPM's
Looks like you can clean up the valves in the evap system, canister and just replace a couple hoses that get brittle?