chuckl10101 Posted February 10, 2014 Share Posted February 10, 2014 Folks: I have a 1983 Subaru GL wagon with a 1.8 engine, and it has a Hitachi carburator that has an electrically heated, bi-metalic automatic chokeoperation. Anyway, the thing has been VERY cold natured just recently, and until it runs for several minutes, it goes like a bucking bronc. The Haynes manual book tells me to check for voltage at the electric bi-metalic heater. I did, and it only reads 1 (ONE) volt. Is this supposed to be all it reads??? That wire is supposed to send current to the bi-metalic automatic choke thus heating it up so that it expanded the bi-metalic coil, and opening the choke slowly. Although the book don't tell how many volts it;s supposed to read, there is an illustration in the book, and the electrical multimeter in the pic is reading 6 volts. I also turned the ignition to the "on" position and put my finget to the bi-metalic coil and it dod NOT get hot as it;s supposed to. Is there something like a resistive wire that is limiting the wire to the 1 volt I'm reading, therefore, not giving it enough heat to make it operate the automatic choke??? Thanks a LOT fo rANY help. Chuck Quote Link to comment Share on other sites More sharing options...
naru Posted February 11, 2014 Share Posted February 11, 2014 Should be 12V. Choke is powered by the Fuel pump control unit(FPCU-a fancy relay) Probably has bad contacts or the power to that section is bad.Fuse #5,I think. If your car has a computer and an O2 sensor(don`t think so) there is a seperate choke relay. Quote Link to comment Share on other sites More sharing options...
chuckl10101 Posted February 12, 2014 Author Share Posted February 12, 2014 Naru: Thanks a lot. I'll check that. it JUST started doing it recently like I said. However, the car had been "sitting up" for about 2 yrs till I could get the gas tank holes repaired and after that much time, I knew there would be "bugs" to work out in the car, but this thing pretending to be a "bucking bronc" in a rodea LOL, is rediculous. I'll surely check that fuse and/or fuel pump control unit. Chuck Quote Link to comment Share on other sites More sharing options...
NuclearDeLorean Posted September 3, 2020 Share Posted September 3, 2020 (edited) My choke also does not have 12v. Going to check using this method. Where is this FPCU? Edited September 3, 2020 by NuclearDeLorean Quote Link to comment Share on other sites More sharing options...
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