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I have a 1995 Thunderbird LX, 3.8 NA. Car has 130,000 miles but runs strong. The engine has a noticiable shake about it only while idleing in park or sittng at a light in drive. Step on the gas - it straightens out, and runs great. I've replaced all the normal tune up parts (plugs, distributor cap, rotor, plug wires). I've checked the EGR valve and all EGR related sensors and actuators - they seem to work fine. No computer codes. No apparent vacuum leaks. Vacuum test gauge shows stedy vacuum. I replaced the head gaskets 30,000 miles ago, but it's been doing this shake for the last 20,000 miles or so. It was very subtle at first, but it been getting worse. I did a compression test 20,000 miles ago - it was fine, I'm going to check it again within a week. Any ideas are appreciated!
Thanks in advance.
Thanks in advance.