So first I want to say hello and thanks in advance for all the great knowledge and help. here's the deal, I have 94 S10 blazer, has been a great vehicle, just turned over 280,000. I have replaced a few things, most recent a fuel pump 2 months ago. I jumped in it at work, drove 30 miles, turned it off, went in house for 2 hrs and now it won't start. I don't hear the typical fuel pump energization on key turn. Thought was the pump again, but it tests fine. relays are original, oil pressure sw. is original. I have 8.5vdc at the connector to pump. Running out of ideas and could sure use the help. I wanna get her fixed, best vehicle I have owned.

Thanks again

 

What brand pump did you use ? these trucks dont like after market brands and they really dont last long

ID recommend putting Oem brands like Acdelco or Delphi

 

8.5V seems low. Can you get the pump to run providing straight power/ground to the connector?

 

Well it's alive again!!!! After much research, I found the problem, the oil pressure switch that is tied to the fuel pump relay was faulty, jumpered the orange and grey wires in the connector and she fired right up!!! Now the task of removing it. It couldn't be in a more outof the way location. Thanks for all input.

 

glad you found the problem the search feature came to the rescue once again !

 

oil sensors in a awesome pita spot to change. I remember i had to pull off the throttle linakges/bracket to get to it. But you have the cpi motor,Im not sure what all you gotta get into to get it.

 

yup he has the cpi i would have to check the famous book chris loves so much

Edit: service manual says

disconnect plug then remove sensor

its located near the distributor (thats gonna be a tight one)


Edit2:

 

Hah.. it was fun enough in a 57 283.. If I only knew then, I woodna bitched about it.

 

I bet the fuel lines and distributors gonna be in the way big time.

 

yea i think so my self

he might have to remove the spark plug wires also to get them out of the way