So my weird high idle problem is still a problem. It happened last weekend, driving up from ohio to Ontario. I stopped to take a pee and the thing wouldn't go down to idle....it just sits at 2200rpm. When I start it, it sputters around for a bit but will start (maybe flooding a bit?). Then it runs really rough for about 20 seconds, finally settling in to a 2200rpm idle. The engine runs fine after reaching that point, except that it won't return to idle. I worked on it today and here's what I did:
1) Switched throttle body with a known good one. No change
2) Took off and cleaned IAC valve. No change
3) Switched AMM with a good one. No change
4) Checked for vacuum leaks. none found
5) Air filter and such is clean. Air track has no holes

So anyone have an idea? I'm moderately stumped at the moment. Any help would be GREATLY appreciated. I definitely don't have the money to take it in to a $hop right now, so I'm open to suggestions. thanks again,

Nate Gundy
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'86 240DL sedan, 260K miles, M46, K cam, 25/23mm sways, 260 front and wagon rear springs; http://valvespringcompressor.weblogs.us/