[nyum96]

I'm new and my 914 is older than I am. I've posted recently about having a little (500rpms - 100rpms) idle when warm. The car starts fine cold. Had valve adjustment done by a professional. The car ran perfect before they touched it but now has problems. I've looked at my "new" and "$$$" fuel injection system (Tank to injectors) and have come to a conclusion it has to be a valve problem. The mechanic said, after the recent adjustment, cylinder 3 & 4 had its valves "3-4 treads" tighter than cyliners 1 & 2. Now, the timing was also adjust along with the dwell. By having a problem with vavle 3 & 4, would this cause a problem with idle compression when warm? Would this also clarify the loud tapping I hear on cylinder 4?

With this said, what is the best way of going about fixing this problem of vavles having a chronic tightness? Should I have a complete engine rebuild (I still read of vavle problems 100 miles after) or isolate the problems to just the intake and exhaust vavles? Can this be done with the engine in the car? In doing so, would it be a good idea to go ahead and replace all the rocker springs, push rods and tubes, etc, etc? What else would I have to replace? I'm clueless since I'm use to successfully tracking down air leaks and common fuel injection issues.

All of this is in theory w/out a compression test but I think there will be a "rebuild" of some kind when the compression test is done. Sorry for the long and saturated topic but I've spent hours trying to fine some insite, and have, but still have questions.

I've put a messured 3,500 miles on the car since January of this year with no problems. Fill the tank up and drive. Did it for 3.5 months and the stress went away about the car. Now its back. It just doesn't make any since but what on this car does? Still love it but the wife hates it. Sounds familiar?