2000 Isuzu Amigo • 6 cylinder 2WD Automatic • 180,000 miles

Car starts and idles fine. When shifting to reverse or drive idle drops instantly almost stalling. If it doesnt stall it will surge up for a second or two then come down to normal idle.I did check for any trouble codes, but there are none and all monitors have passed. Doesn't feel like an idle air control problem but not sure. Has 180000 miles
January 2, 2011.

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