My friends 94 4.3l s10/15/sonoma whatever,runs like ***,wont stay running,and misses.You have to keep revvin it to keep it going.Looked at the injectors and they are dumpin gas into the tbi.Pulled the elec connector on one injector and truck runs much better.So Im thinkin fuel regulator is gone.My questions are ,is it gone,if so,where is it located,and how do I get to it.

 

You can watch the injector to see if they look even flow and spray. I bet he needs a TBI base gasket.

 

I thought it might be a vac leak but once you rev it up a bit,and clear it out it seems to run fine.When you plug the other injector back on it won't even idle for more than 1-2 sec.

 

pressure test fuel

 

check the map sensor hose my older 91 tbi acted just like that and it just needed that hose hooked up if im thinkin right the 91 and 94 tbi should be realitivally the same i think it is one of the small one lines on back also is it throwing a code