Q: my rav4 wont stay at idle and stalls out on 2002 Toyota RAV4

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My 2002 rav wont stay at idle and stalls out if i take my foot off the gas. when i do press the gas its fine and drives great but if i come to a red light and let off the gas it stalls.
(1) Answer
quite likely the coils that go over the spark plugs. One for each spark plug. A computer diagnostic will tell you which one ofthe coils is not working.. They are about $100 - $150 each..