Style and Passion
Join Date: Jun 2010
Location: United Kingdom
Sounds like an air leak down side of MAF and remember it may be one of the six chrome intake's and their rubber hoses or paper seals on the head!
Top Tip !!...........get some carb' cleaner (you know, that 'Wynns' stuff that removes all the carbon gunk from carbs and throttle bodies etc)
...Spray it around the above mentioned items, if you notice a change in revs (maybe a cough & a splutter!)....Then you have found the leak/suction which may be causing this lumpy idle.
ps. I had exactly the same problem, traced it straight away to a leaky paper gasket on one of the chrome intake pipes where it mated to the head!
Arte et Marte, By Skill & by Fighting.
Traded my soul for lifelong car heaven! and poverty !