4runner idles too low (about 350 - 400 RPM) when in gear (auto). It shakes the whole truck. But in neutral it idles where it should at 800. anybody know how to adjust it? I can do it if I know what to do. Thanks.

A little more info would help. Have you tried the FSM yet??

don't have access to FSM. not sure what more info to give. I thought for sure there was a way to adjust the idle speed. hoping someone's aware of how to do it. Thanks in advance for any help.