10-02-2020, 11:39 PM
one other failure common on old VITARA
G16, all.
is IAC dEAD?, if the IAC is dead, there is no cold running air, supply.
so that means floods.
The ECU can never know that the IAC is dead (cold start idle air thermal) in the base of the TB.
the ECU assumes the IAC works and if dead, flooding it will do.
the IAC is open cold and closes at 150F.(65C) if it never opens , flood it will
then when fully hot runs ok. see why? lack of air.
the maf I thinks is off line cold and can not help. (IIRC)
The IAC is open cold and RPM near 1500 rpm. (colder it is faster RPM)
does engine run ok hot and is it really 82c + hot or not?
the ECU has many modes, besides limphome and backup.
cranking
cold idle
hot idle + closed loop 02
acceleration
deceleration
cruise,
and engine load.
and all based on engine coolant temperatures. (and altitude)
this is why all symptoms help "evidence"
G16, all.
is IAC dEAD?, if the IAC is dead, there is no cold running air, supply.
so that means floods.
The ECU can never know that the IAC is dead (cold start idle air thermal) in the base of the TB.
the ECU assumes the IAC works and if dead, flooding it will do.
the IAC is open cold and closes at 150F.(65C) if it never opens , flood it will
then when fully hot runs ok. see why? lack of air.
the maf I thinks is off line cold and can not help. (IIRC)
The IAC is open cold and RPM near 1500 rpm. (colder it is faster RPM)
does engine run ok hot and is it really 82c + hot or not?
the ECU has many modes, besides limphome and backup.
cranking
cold idle
hot idle + closed loop 02
acceleration
deceleration
cruise,
and engine load.
and all based on engine coolant temperatures. (and altitude)
this is why all symptoms help "evidence"
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