Originally Posted by 92olds88royale
it had the spring in it but i wll check again tomarow. Wouldnt a vaccum leak cause the problem all the time? nomatter hot or cold or once one day and not for a week or 8 times in a day and once the next?
Yeah, if you do the hand on the oil filler hole and feel a vacuum, you will know something ain't right.
Vacuum leaks cause more problems at idle. And if you have a bad seal somewhere causing a vacuum leak, it is possible that heat helps to seal the leak as things expand and tighten up. This might occur, for example on the throttle body seal or manifold gasket seals. Can work the other way too, i.e., things get worse when hot.
Usually rough running is caused by ignition problems. But you have changed most of your ignition components. I assume you mis-typed cts, meaning cps for crankshaft position sensor?
And, did you clean the throttle body and the passages around the IAC when you changed it?