Contacts
NAPA; Atlanta, GA; 877.805.6272; NAPAonline.com
WESTECH AUTOMOTIVE; Silver Lake, WI; 262.889.4346; WestechAuto.com
HOW IT WORKS
Chokes overcome cold start engine problems by supplying an extremely rich mixture. As the engine warms up, the choke is supposed to open; however, if it “sees” insufficient heat, it opens late or not at all. Usually the choke is referenced to exhaust temperature via heat passages in the exhaust manifolds, heads, and intake. If they aren’t present, an alternative must be found—like this divorced electric choke assembly.
Chrysler’s solution used a control unit with a resistor plus a normally open thermostatic switch. On a cold engine, the 10.5-ohm, 0.8-amp, resistor reduces battery voltage by increasing circuit resistance; less voltage reaches the choke
HOW IT WORKS, CONT’D
coil, delaying its opening. At about 82…