hello iam new to this site, have been searching for a couple days the weath of information on these trucks is outstanding.

Iam hoping i could get some help. I just bought my wife a 1995 blazer with 98k as a beater for her. we bought it running rougth for very cheap.I brought it home did a pressure test and the leak down was massive!!! i removed the upper intake and the return line had a pin hole leaking everywhere! i never saw a intake so clean!!. I replaced the nut kit and the truck is still running bad not as bad but sluggish slight miss at idle and no power till 3k rpm.

I put my pressure tester on it again, i get a intial 54 pounds of pressure, after 10 minutes iam around 48psi is that acceptable? I did not do a tune up yet, was trying to keep the funds very low in this truck since it really is just something to drive to keep the nice car off the rd.

Thanks for any direction you can give me.

Jp

 

Those Fuel pressure readings look good. They appear normal.

 

thanks.

I replaced all plugs and truck is running good!! all plugs where fouled pretty bad!

 

Those fuel reading are not good.... What type of distributor do you have? are the plug wires vertical or horizontal.

if they are vertical and your engine looks like this...

You should have 60-62psi and should not drop down below 55psi in 10 minutes