now here is a debate.
various internet 'sources' claim that heated air intake leads to better fuel efficiency by lowering the induction resistance. from what i can tell, since the IAC and ISC get heated (via hot engine coolant directly), the temperature of the air induction gets elevated.
so:
1.what happens (to fuel consumption) if i completely bypass the 'heating circuit' of ISC/IAC? (and thus cause 'colder' air intake temps?)
2.what happens if i block the IAC competely? mine suffered from too high cold rpm (2k and more; classic symptom of high-mileage vitaras), so i had it partially blocked (with RTV) till i got ~1500 cold rpm (which is fine for me). i also attached a 2k ohm resistor in parallel to the ECT to (partially) counter-act the AFR ratio when cold (otherwise it runned rich as a pig untill IAC closed). only bad symptoms i get is engine shacking for a couple of seconds in cold weather mornings.
various internet 'sources' claim that heated air intake leads to better fuel efficiency by lowering the induction resistance. from what i can tell, since the IAC and ISC get heated (via hot engine coolant directly), the temperature of the air induction gets elevated.
so:
1.what happens (to fuel consumption) if i completely bypass the 'heating circuit' of ISC/IAC? (and thus cause 'colder' air intake temps?)
2.what happens if i block the IAC competely? mine suffered from too high cold rpm (2k and more; classic symptom of high-mileage vitaras), so i had it partially blocked (with RTV) till i got ~1500 cold rpm (which is fine for me). i also attached a 2k ohm resistor in parallel to the ECT to (partially) counter-act the AFR ratio when cold (otherwise it runned rich as a pig untill IAC closed). only bad symptoms i get is engine shacking for a couple of seconds in cold weather mornings.
Vitara 1998, 1.6L/16v, 5door, 5speed, G16BS.