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What is the problem when at idle I have hard steering? I just replaced the rack.
mass air flow sensor could be going bad
It is behind the thermostat housing on the nose of the engine block. It is in line from right to left with the oil filler cap. There may be another air valve associated with the steering pump but it is not the "idle" air control valve (IACV).
Remove the throttle body. Remove the 4 IAC mounting screws. Remove the IAC.
The underside of the throttle body.
Unfortunately, the 2002 es300 was the first year that Lexus did not use a IACV in the ES300.
The idle is controlled by the powertrain control module ( computer )
700 to 750 rpm is normal. if the engine stalls, you may have to replace the IAC (Idle Air Control) Motor. they get stuck.
remove and clean the idle air control valve( iac ), and or replace unit. located on back of throttle body housing. try this first.
When an idle control value is clogged the idling speed of your vehicle will change. The car may also stall when you turn on the air conditioning.
Could be the auto idle control valve, try cleaning before replacing (about $300). Another simpler possibility is the fuel filter,replace this first,
The idle air control valve controls the neutral idle of the 2001 Honda Accord. A faulty idle control valve leads to an erratic idle. To replace it first locate the valve on the intake manifold. Unplug the unit and remove the three bolts holding it to the manifold.