When you initially turn the ignition to the ON position, (do not start the engine) the fuel pump will run for ~2 seconds and then shut off. What is the fuel pressure when the pump is activated?

 

i dont remember what the pressure was when the pump was running i done gave the fuel pressure gauge back i will have to get it again tomorrow to be sure. i will check it again i think it was up around 60 but i got chemo brain so i don't have a very good memory lol

 

Proper fuel delivery on these engines is mandatory. Unfortunately it has a fairly high failure rate.

 

i know they run great when there running right iv had this one for about 7 or 8 years and never ever had a problem out of it. its took me anywhere and i mean anywhere i wanted to go. my wifes truck is an 02 denali quadrastear and she wont let me take it as far back in the woods as i got to go sometimes lol

 

the blazer seems to be running pretty smooth now its not smoking like it was its still running a little rich because i can smell it.but its running again so i cant complain.i have an old snap on counselor mt1665
that was given to me.they said it works and has everything with it except for a manual or any instructions with it i have never hooked it up or tried to use it. is this thing something i could use on this blazer if i could find some instructions somewhere on how to use it? and do you have any idea where i can look to find any info on how to use it? or is is useless? i dont even know what it does or what its for but they were going to throw it away so i took it thinking it might come in handy someday and maybe someday i can learn how to use it.

 

You can try the Snapon website, other than that, you might be SOL.

 

Happens to be your lucky day, and I'm good with Google:

http://captfiero.com/uploads/MT1665.pdf

A bit of a large file (around 70 mb or so). May take a moment. Looks like the real deal, however. (From: West Coast Fieros Forum: SnapOn MT-1665 )

 

thanks i found this very same thing lol i got the whole manual! i had to go do my chemo this week so i have been too sick to try using it yet but in a couple days i will be back to normal for a couple weeks and i will definitely learn how to use it if i can from what i read so far it will work on the blazers 4.3 and my 75 camaro and my 240 sx so i think it will come in handy after all! good thing i saved it from the dumpster!

 

the mechanic where i worked was throwing it away and told me it worked fine it was just of no use to him no more i got all of it with everything that goes with it but the roll cart it was on. one of the other techs wanted it to put his portable fridge on! lol witch was fine all i needed was the machine!