I had an old IAC that needed to be replaced. a buddy of mine had just bought a used engine from japan from a car there (less than 50,000 miles on it) and he gave me the IAC out of that engine. Put the IAC in my car, ran fine for a couple minutes, then when the car warmed up,it sputtered then it died. Now i just checked the resistance of the pins and they were all 39.8 or so except for pins 4 and 5. they were 4 ohms but 5 and 6 were still 39.8..... Is there something else with the car that can cause premature failure of the IAC or was it just a bad IAC when I got it. Can it be cleaned up on the inside to fix this problem, or is it shot?

 

Sorry, i forgot to tell you, my car is a 91 stealth R/T NA and the new IAC was from a japanese Mitsubishi 3 liter. Same as whats in the stealth.

 

I would say that it is more than likely bad. If one of the coils showed a low resistance, it will not work properly. It was probably bad from the start.

 

Short circuits in wiring or the ECM may cause the IAC to burn out.

 

I have no check engine light but is there a way i could tell if my car is shorting out the IAC. i don't want to buy the 200 dollar part , put it in and short it out... is there a way to test the voltage of the connector that connects to the IAC unit to see it one is bad or sumthing.. ANY suggestions are appreciated... also... i needed to put in a new engine temp sensor.. no one had one.. napa had a sensor for 91 thru 96 mitsubish.. same connector but it was a "LITTLE" different. screwed in ok, doesn't leak and car still runs but when i first put it in i got a light, disconnected the battery for a minute and then the light dissappeared and no more light... what was the deal with that..?

 

also.. the engine temp sensor was to the computer.. it wasn't to the gage...

 

Can anyone help me out..?? PLZ!
also will both of these fit.. one is 144 bucks the other is 151bucks. I want the 151 dollar one but its not exactly like the one in my car. I did search vehicle specific.
Heres the link-

http://www.autopartsgiant.com/CAT_FRAMEX.cfm