Oh, i guess i didnt know that, i got the idea from another thread here. Its just weird that it ran great on my way to work, and barley on the way home.

https://blazerforum.com/forum/showth...t=13501&page=9

 

isn't cylinder# 4 on the passenger side in the middle? and isnt the fuel pressure regulator directly above it inside the intake manifold? is it possible that the fuel that was leaking mostly fell into cylinder#4 and caused a fuel washed cylinder and now the rings have trouble seating from the glazed cylinder? on my truck i got 170 psi on all the drivers side cylinders and on the passenger side i got 175 psi except for the middle cylinder which i got about 145 psi......i then squirted some oil in the cylinder after and re-tested it but no change.... you might want to try to do a leak down test on that cylinder. thats what im considering doing on my truck.....

 

You are correct, cyl 4 is the middle pass one. But the fpr is on the back of the spider injection, which puts in at the back of the manifold in the center. When i pulled the upper in take, the ports for 3, 5, and 6 were nice and clean, and 1, 2, and 4 were full of carbon and junk. I think that was from the fpr leaking.

My dad also said i should squirt some oil in it and try again, but the truck is sold. Time to get a full size again.

 

you mean you sold the truck but you still have there now truck at your house?