Ok ,after careful visual inspection I did see that when I had pulled on the throttle linkage the other day,it didn't go back to its original place,so it was opened .I hope I'm explaining this correctly. Anyway, that's what I think led to the high-idle surge when I started it. I just started it again,and it was back to starting nice,then stumbling. So I think it's either the 02 sensor or the tps sensor. Both are probably original,so it's not a bad idea to go ahead and replace both .I've tested as much as I can. The throttle and flame trap were all cleaned a few years ago when I did the head gasket.
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