Chevrolet Repair: Electric Choke Problems on Instrument panel, quadrajet carburetor, fuse box

Question
I have an 86 Chevy K10 4x4, just got done rebuilding the motor (5.7L) and I bought a remanufactured quadrajet carburetor from guarantee carbs.  The only thing i changed in the carb was the metering rods because the motor was starving for fuel.  I thought i had everything fixed and now my choke light on the dash comes on intermittently and blinks here and there.  I replaced the connector that goes to the coil on the carb and the wiring all the way back to the oil pressure and choke heater connector the only thing i haven't replaced are the two wires (one blue the other tan) that run from the oil pressure sensor to the fuse box.  I also checked the all fuses and they were good.  I looked in the manual and it shows a fuse under hot in run and hot in run or start.  where do i find these cuz i cant' find them on the main fuse box.  Also what do you suggest i do on this matter.  everything from the oil pressure sensor and choke heater is new up to the carb.  i thought it would fix this problem but it didn't.  The carb also does this even with the air cleaner off so i know its nothin with the air cleaner, connection to the coil, or the connection to the oil pressure sensor and choke heater.  Please help me out!

Andy

Answer
Hello Andy,
First of all, hot in run and hot in run or start just indicatew when the fuses will have power to them.
The "Hot in Run" only have power when the ignition switch is turned to run. When it is turned to "start", those fuses will not have power.
The "Hot in run or start" fuses will have power when the key is in either position.
There are also some "Hot at all times" fuses.

Have you checked the wire to the choke for power?
It should not have power when the engine isn't running, but when the engine is running, and there is oil pressure, the choke wire should then have power.
That wire, by the way, doesn't operate the choke. it just operates a heater in the choke housing, to heat the bi-metal coil spring, and actually open the choke.
It is roughly calibrated to heat the coil enough to open the choke in approximately to correct amount of time for the choke to perform its function.

So check for power with the engine running, and also make sure the carb is grounded on the manifold. the choke heater needs a complete circuit to operate the heater.

Now, when the engine is cold, and you hit the gas pedal the first time, the choke should slam all the way closed.
Then, after the engine starts, a choke pulloff should open the choke about 3/8 inch or so.
Then as the engine warms up, the choke should continue to open, till it is all the way open.
If that happens, doesn't really matter about the light. But I would suspect there is an intermittent open, possibly the ground of the choke heater.

Van