Smoking and rough running at 2000RPM

Damian Brewster said:

Evening all, long time coming this post but ive been working my way through along list of trying to eliminate the lumpy/smoking symptoms you both had at 2000 rpm. Lastly I decided to stump up the cash and get the injectors reconditioned thinking that they were the root cause. After a nightmare getting them out as 2 were seized solid and i had to fabricate a puller, all 4 were found to be well out of Spec and have been refurbished by bosch. Great I thought all fixed, well no unfortunately it still does the same and then I found this thread. I'd already ruled out the boost control solenoid after replacing a vacuum hose and testing the vuccum pump. I can see the turbo actuator arm physically moving in and out in relation to the throttle being depressed whilst stationery but I'm wondering if I overlooked something as this was such a sure fire fix for you both. Do the solenoids act differently under load, had your solenoids packed up completely?
Thanks in advance
Damian

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tonyt37 said:

The symptoms improved but never went away completely. I find it performs much better on premium fuel or with some additive like Millers power. I haven't had the injectors done but probably should. It's done 115k now.

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