just redid the test: unhooked the breather hose from the airbox and hooked the breather hose to a vac gauge. removed the pcv hose and capped the pcv valve and the port on the intake. turned on the already warmed engine and the gauge immediately began to indicate pressure not vacuum. after about 15 seconds 3 psi of pressure had built up in the crankcase

 

With the PCV system disabled, it is normal for the crankcase to develop a little bit of pressure, as no ring seal is perfect, therefore, you do indeed get some blowby.

If the plenum was blown, you would have a major vacuum leak directly into the crankcase, and so you would see a vacuum there, not pressure. As you are only seeing the 'normal' pressure in the crankcase, that implies that your plenum is NOT blown, and your rings seem to be OK. However, since you have the excessive oil consumption, there IS a problem there somewhere.

Do the compression test, both wet/dry, see how that comes out. Although, that won't tell you a damn thing about the condition of your oil control rings....... the oil consumption, with a good (seemingly) plenum, sorta indicates they are toast..... or, you have bad valve seals..... Have a look down your throttle body if you haven't already, and see what you see. (a mirror, and a good flashlight make this job easier. but, to use the mirror, you have to pull the throttle body.)

 

my bad but i still dont understand how ther can be vacuum in the crankcase when the tsb said ther can be up to 3 psi of pressure. are you saying that the vac would be greater than the pressure so my gauge wuld read vac if ther was a leak? i do get a steeady stream of steem or something when i unhook the breather hose from the airbox. when i look down into the plenum i see some black grit on the bottom along with some wetness but watever the liquid is seems to be clear

 

the oil u are seeing is probally from the pcv valve. if u have pressure u are good but if u have vacmum then the plenum if blown

 

You can't have both at the same time. No. The pressure is what it is, either above, or below ambient atmospheric pressure. On a system that is functioning 'normally', you will see a bit of pressure in the crankcase. On a system with a problem, (blown plenum for instance) you will see vacuum. (less than ambient pressure.) Since you are seeing the normal pressure, that implies everything there is as it should be. (plenum NOT blown.)

Have a look at your PCV valve, all crudded up? Give it a shake. Does it rattle? If it doesn't, or is obviously filthy, replace it. If it is stuck open, it will suck oil right out of the valve cover, and consequently, you will have high oil consumption.

Is there evidence of oil in the PCV line going to the intake manifold? That would be another indicator of bad PCV valve.

 

ok i understand now. i have recently replaced the pcv. how do i wire a remote starter to perform the compression test?

 

Draft a friend/family member?

or, two wires and a momentary on switch. One wire goes to the battery, other wire goes to the starter S terminal. (the little one.) (both wires go to the switch......)

 

i would have got somebody to sit in the truck and crank but i saw the switch right next to the compression test kit and it was only $12 and it looked sweet! so 1 wire to the positve side of the battery and the other to where?

 

when i put a socket on plugs 5 and 7 the socket seems to just spin on top of the "nut" part of the spark plug, like its too small?? and i cant get 11/16 in that stupid heat shield crap. whoever engineered thos stupid heat shields is an idiot!

 

Other wire goes to the small terminal on the starter. Up on the solenoid. (the smaller round part....) it is a little terminal, with a single small wire going to it. (and probably purple.... maybe)

There is probably a bunch of crud down in the heatsheilds, that is preventing you from getting the socket all the way on. If you have compressed air available, try blowing it out, if you don't, use a pair of pliers, and just yank the heatsheilds out of there. It won't hurt anything not having them there. They hang on nice and tight though... so, it might take a bit to get them to surrender.