ok so i bought a blazer with 2putt8 in it ran good then i took the truck off the trailer and it sat for a few weeks went to start it and it cranked over strong would not fire. i noticed i did not hear fuel pump so i went to change it, tested it it was good, then checked fuses found ecmb fuse was dead changed it to only have it pop. found that problem at the oil presure switch wires.
now i have no pump when i turn the key but works when i put 12v to it. changed relay looked for fuses but no luck.
what could it be????
any help would be great

thanks

 

what is 2putt8? Recheck your oil pressure switch wires and fuel pump relay. I'm not sure how similar your 87 is to my 93. Let me do some research, and I'll get back to you.

 

2putt8 =slow 2.8l

checked realay seems to work not sure on how to bypass switch would like to do that

 

Fix the problem at the "oil switch" wires.

 

rewired the wires still nothing relay is good fuel pump is good all fuses are good now im at loss gonna try the oil pres. switch and go from there

 

:icon_brick s:this things about to make me burn it to the ground replaced oil pres switch and wiring fuses and nothin any thing else it could be

thanx