my 4 cylinder 22RE was doing that same exact thing, I took mine to an import specialist in my area, and he said something w/ the EFI was out of whack and the fuel to air ratio had to be tweaked, and something called an "OC" had to be tuned as well. Also claimed something in the throttle body was either clogged or just not functioning. $75 later and it runs perfect. Not sure if your's is carb'd or EFI so just letting you know what I had to do =)

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