this blazer when brought here was spitting, spluttering and wouldnt go over 20 mph. we replaced the fuel pump, and fuel is getting up to the throttle body but thats it! you can pour gas in the carb and it will run? whats next? where do I go from here?

 

I moved your thread in to the 2nd Gen Tech section to get the responses you require since your truck is a 2nd gen and not a 1st gen... I have also deleted your second thread on the subject. Please do not double post.

As far as your problem goes, have you verified that you have 60psi to the fuel rail on top of the engine?