just had my wagon (72 type 3 1600 twin carb) fully serviced about a month ago, has been running like a dream since, but a couple of weeks ago i noticed a bit of a rough idle. she has been pulling beautifully and operating perectly whenever moving, but i have noticed that when at idle every few cycles she labours a bit on 1-2 cylinders, so the revvs drop slightly, the car vibrates slightly more on the stroke that the revvs slow, then it picks up again, this cycle can happen upto 2 times per second. initially i assumed maybe one of the sparkplugs had fouled (as i didnt get them replaced - they had only been done at christmas) so i put in some nice new plugs but that doesnt seem to have helped. i also know that the pervious owner told me the carbs were due for a rebuild when i bought the car (8 months ago) and i noticed when looking at the choke, that when the choke is on the upper butterfly in one carb doesnt moove the same as the other. as i said at full song there isnt a problem, she is as sweet as ever, just at idle that i get concerned.
what are the common causes of a uneven idle? should i be concerned?
baybuscamperkid prince of insufficient light, ruler of heck
4,316 posts · joined Aug 2002 ·
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