I may just pay for the valve check this time. I did the desmog and still getting some low popping at low speeds. Found a shop in Hurst that will do it for 170, plus doing some other work. Want to see if this will help out. Besides, I have had a hell of a time finding a 4 mm wrench, Sears and Pep Boys don't have them.
I realize this is a little late....but,......... Check at Sears again for an 'ignition wrench set.' It is a little pouch with about 10 very small combination wrenches (if they still make them). They are SAE, but, there is one in the set that is almost a perfect 4mm. I tie a string to the box end (don't want to take any chances of it falling inside the cover!!!) and it works real well. I've done my valves probably 6 or 8 times, never a problem....except doing it is a royal pain in the Cranberries. Hydraulic lifters would have been good. Another thing that makes the job a LOT easier......take a piece of 3/8" or 1/4" hardwood dowel, cut a split in the end with a razor saw (X-acto), and mount a short piece of feeler gauge in the split. A drop of super glue on both sides along the split and I drilled a small hole through the dowel and gauge and glued in a toothpick, sanded it flush (prevent the gauge from coming loose). Make the dowel about 8 or 10 inches long. This makes the thin gauges real easy to push in the gap without them flexing.
