Thank you for choosing Just Answer.com are you getting enough fuel?
yes the fuel glass shows plenty of fuel, I did have a problem with that earlier but I put a new fuel pump on already
I have you checked the filter again since you changed it last?
on the sight glass the fuel is just above the half mark and stays there as I try to throttle up the carb.
Is there anything electrical on the carb that could cause this problem? or is the connector just for the choke?
I have turned the truck off and looked to see if there was a good stream of fuel as I turned the throttle and it looks like there is.
This last carb. I have is a Vapex from O'Reilly, all of the carbs. are from this place.
So it starts and stalls?
Try this may help
SYMPTOM - ENGINE OFTEN STALLS
Some 1985 carbureted, federal emissions specification trucks may exhibit a slight hesitation when accelerating from a stop, or during light throttle acceleration at low speeds.
This condition may be caused by:
The following part numbers have changed in production as of September 1985.
SERVICE REPLACEMENT PART NUMBER INFORMATION:
To correct a hesitation condition on vehicles produced prior to September 1985 the following parts must be replaced as a set.
On high altitude specification vehicles the air horn must also be replaced.