Well here we go I owned this lovely piece of machinery for about 3 years and have tried to eliminate a lope at idle when warm sitting at a traffric light or stop sign. Now I have put plugs, wires dist cap and rotor and have other people look at this car with no real conclusion on correcting this problem. Now the car runs great out on the road and no check engine light, the data stream that we can read seems to be order I just don't know what is causing this. If anyone has any ideas or have seen this problem any help would be appracieted. Thanks in advance

I'm looking at same thing in a car that sat

My ideas from research///
Could be a vacumn leak?
Maybe dirty idle control valve?

Would like to see what others think...

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83 500 SEC Euro 198K

I have been over the vaccum lines replaced a number of them due to deteration and cleaned the idle control vavle, the car acts like a secondary ign miss but not that drastic it has been scoped a coulple of times with good results and it does it on a constant basis very light but noticable. I have even done a leak down test on all the cylinders hot and cold but holds good pressure on all cylinders and I can't see anything out of the ordinary, did not know if vavles have up or possible injector problems