general problems of the 1997 Toyota RAV4

Rav 4 Toyota 1997-was unable to drive more than 30 miles without the rpr increased without control, transmission and engine become extremely hot, fluids were drained . Car sent to darcars yoyota thermostat was replaced, and now facing severe transmission issues, because lack of recall rpr 's issue very detrimental and risky .

The idle air control (iac) valve controls the idle speed by metering air around the throttle plate, under control of the engine computer. The iac valve on my vehicle sticks when the engine is cold, requiring me to hold a slight throttle pressure to keep the engine running after cranking. On several occasions, as I was easing the car out of the garage at idle, the iac valve unstuck and caused the car to surge ahead. This is very abrupt and disconcerting, but it has not (yet) caused an accident. I have a Toyota factory shop manual, and I made the resistance and voltage checks called out for the iac valve; all were satisfactory. Since the valve's coils appear to be okay, and the engine computer's commands appear to be okay, I conclude that the iac valve simply sticks when it is cold. The problem goes away with a warm engine. This problem began about six months ago, and it now occurs at almost every morning start. I commute about 25 miles per day.