1988 d50 with a weber carb on it ,when it is cold its fine when it is at operating temp it runs for about a mile or two then bogs down and shuts off, if you spray starting fluid it starts or you wait 15 to 30 minutes it will run again for a while

You can look down the throat of the carb and see if the choke is actually doing anything. If so, that's really all the "cold start" mechanism is.

Here are the common cause of surges, stalls at stops, slow idle speed, erratic idle, it is in most cases the idle speed control air-bypass valve and/or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving

It sounds like carburetor problems. Have you tried a new gas filter?
Check if the choke is operating properly-it may be open too far for a cold engine. The fuel level in the carburetor bowl may be set too low. You might also want to check volume flow from the mechanical fuel pump: disconnect gas line to carb and catch the fuel in a container as you crank the engine-watch fuel flow and volume-it should give a pint or two after half a minute of cranking, maybe less cranking time. Also check the needle valve at the inlet for carb-sometimes a tiny bit of trash or debris will clog up the needle valve. If all else fails, try a rebuild kit for the carb-those simple old carbs should be easy to rebuild.
How long since last tune-up?

run fault codes and look for a sensor fault . Possible ambient air temp sensor/MAPMAF sensors

I would like to know the fuel pressure reading, is this truck 6 or 8 cylinders?

is your check engine light on? sounds like your intake air temp sensor. sometimes you can unplug it {while its running} and listen for change in engine. it will slow down or shut off. i would suggest getting one from local salvage yard before i bought it new. if it sloves the problem then you havee= the option to use it or buy new.

could be clogged cats or may even be bad crank sensor.

richard is right
what ever has happened after you played at being electrician
Put it all back to standard then get advice as to how to do each part

Distributor Ignition Pickup may be defective, these are sensitive to temp changes, they will cause a loss of spark..

Here is the most common cause of this stall, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake