Won't start up

buy a new carburator on ebay for 20.00,the diaghram and all the rubber hoses are shot,that is what ethanol does,eiher try a rebuild kit or wait 2 days for a new one

1.8 L honda 34mm keann carbs.Altitude adjusting via all vacuum lines 1984 to 87dx models they just get old and they have plastic floats 1 carb.1 float set they are a discontinued oem part they will fill up with gas and sink causing them to flood.Find some old stock float sets and carb.kit should fix right up.Maybe some one out there makes custom carb floats out of brass???That is what they need!!!!

Just for the record, its a throttle body not a carb.
Sounds like the injectors are not getting power or a ground signal from the computer.
You would check them with a meter or low voltage test light.

Sounds like it is not getting fuel or air? Check your air filter and clean it out. Possibly remove it completely to see if this helps keep your vehicle runing the next time you test it. Check your fuel filter. It sounds like it cannot get enough gas to keep it running. Try cleaning your fuel lines with something similar to gum out. You add it to your gas tank when it is on empty and then add a certain amount of gallons of gas as indicated on the can to complete the clean out process. I would recommend cleaning at least twice.

Change the fuel filter.
You may have to also change the fuel pump (sounds like it is getting weak) , but the filter is the cheaper/first step in the process.

fuel filter is going- will be ok at idle-when you tested it- but fails under load

if it is fuel inj. check for good fuel pressure. maybe fuel pump in gas tank.

did you change the fuel filters? One in-line and one in carb

I had a similar problem with an S-10 some time back, and I understand that the 88 C1500 has the same fuel pump setup. Two questions you must answer: First, did it run out of gas just before the problem started? Second, if you remove the air cleaner cover and pour just a little gas into the carb/throttle body, will the truck start and run until the gas is used up? If you answer 'yes' to the last, or to both questions, the problem may be in the electric fuel pump mounted in the gas tank. In my case, when my son was driving the truck, he would let the fuel level get really low before putting gas in the tank. Fine contaminant particles would build up on the fuel screen, and caused premature pump failure when some of the contaminant particles passed through a small hole in the screen and wrecked the pump impeller. Give it a look-see.

remove & Clean A.I.S. motor good with throttle body cleaner, as well as the port it comes out of.