Question about 2004 Toyota Sequoia
Define properly? (too high/low. or surges or/)?
hot or cold engine or both?
idle is last thing to work,
all else must be good.
the ECU controls idle at all time (not in limphome mode)
all gross misfire causes, idle to fall and los e control
same with lean or flooding. lost control
the ECU/pcm works very hard to keep idle right using its slave ISC.
did you connect a scan tool and scan for errors?
if the scan tool shows AFR perfect in closed loop at idle hot.
then the ISC is stuck.
AFR is perfect air fuel ratio mixture that all EFI do,.
if engine stalls, make sure the EGR does not stick open
Posted on Feb 19, 2014
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Posted on Jan 02, 2017
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