will a bad IAC cause bad mpg?
#1
will a bad IAC cause bad mpg?
i cleaned my IAC about a month ago and it was filthy with black crap. so i sprayed it all out with the MAF cleaner i have and re installed it and it made a howleing sound but it went away and just makes it quiet now at idle.
but after cleaning it i went from 14mpg- 21mpg and averaged for 3 weeks around 20mpg with 32.8 AT tires
no i'm getting 50miles per 1/2 tank will a bad IAC cause this to happen if its not working right?
need ot know if i should change it but the cheepest here is 90$
but after cleaning it i went from 14mpg- 21mpg and averaged for 3 weeks around 20mpg with 32.8 AT tires
no i'm getting 50miles per 1/2 tank will a bad IAC cause this to happen if its not working right?
need ot know if i should change it but the cheepest here is 90$
#4
#5
I believe the IAC (Idle Air Controller) is just a calibrated air by-pass control device (air bleed past the throttle plate) used to control the idle the same way as an idle stop screw works on a carbureted engine. The only difference is the computer controls it and constantly adjusts it to maintain a steady idle. Once you come off idle its out of the equation as far as gas mileage is concerned.
#7
#8
Originally Posted by diocide
The IAC on my ranger says in big letters, "Do Not Use any Solvents on the inside of the IAC" I'm not sure if it's just to get you to buy a new one, but maybe all your carb cleaner messed something up in there?
but i also cleaned the MAF so idk what helped the most i will check it out
#11
I cleaned my IAC with Carburetor Cleaner at 60,000 miles and put an additional 70,000 miles on it with no problems. Some solvents will break down the rubber o-rings inside it, causing it to bind and wear prematurely. Making sure you blast it dry with compressed air will prevent any malfunctions after cleaning it, IMHO.
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