I just installed a new remanufactured motor in my 91' S10 Blazer. Everything is running great except when you give it gas at a low RPM it hesitates and dont take gas. If you rev the motor in park it takes a second or two to catch up with the gas you give it. Also when you put it in reverse it dies... Out on the road it takes gas fine and runs good.. Just when you stop and start giving it gas again it whats to hesitate before it takes off. Any help would be much appreicated...

 

did you ever check the fuel pressure ? it should have 11 to 14 psi to run good

 

No i never checked it. I have never checked the fuel pressure before.. How is it done???

 

you can pick up a fuel pressure tester at your local auto parts or sometimes they have a loan a tool program where you leave a deposit for the tool and when its returned you get the money back.



to use it there should be a cap on the fuel line going to your tbi the pressure tester gets put on that fitting under the cap.

 

Thanks i will do that.. I also was thinking about changing the fuel filter. It had set for about a year with the motor blown up.. I didnt change the fuel filter.... I also thought about a rebuild kit for the tbi... Know any other things i can check along the way that might be a possibility???

 

Check your thottle position sensor too.

 

Yeah, I didnt think about that. I will check into that... Thanks a lot for all your help.