90inworks

so i replaced it tonight. prob a good thing i did because, i pulled the what looked to be stock one out with great ease there was no hose clamp. my guess it was leaking so that could be the suspect for bad mpg. any ways i tried blowing threw the vavle that was a joke. i slaped the new one in and let it run for a min sounds like she is running better. has any one else replaced this and noticed a difference?

jason191918

I have changed it with no difference. I was doing a tune so I changed it anyway.

eyw

Just replaced mine tonight (PCV valve and grommet) along with a whole slew of other items in my new '93 pickup including rotor, distributor cap, plug wires and plugs (previous owner had all Bosch equipment, which I replaced with OEM). Previous owner also cross threaded the #2 plug and the spark plug wasn't fully seated.

I made all the fixes and went for a quick test drive tonight. It was a night and day difference in the amount of power available. Before it would pull away from a stop sluggishly and now the response is much quicker and stronger.

Elton

i replaced mine cause it was only a few bucks and took all of 5secs to swap it out better safe than sorry plus i had like 153k on it

iamsuperbleeder

Well, here's the thing... the PCV in PCV Valve stands for positive crankcase ventilation. Replacing a stopped up valve isn't like making the intake able to breathe better. All it does is circulate air through the crank case and cylinder head via access through the valve cover (where oil wont get sucked into the valve, but over time you get buildup in it leading to it clogging up) with the valve attached to a suction hose at the back of the valve cover on the 22re, and another hose usually as far away from the valve as possible, on the 22re the hose in the center near the front of the valve cover. Probably, well I'd say, usually wouldn't do much for gas mileage or performance, but I've had some in other vehicles stop some engine noise like a little knocking or tapping. I've heard more than once that a good working one helps extend the life of the motor though, so with that in mind, it's good to replace them when in doubt!

Man4God

I tried to replace mine with a unit from AutoZone. It broke as soon as I tried to shove it in the old grommet. So I just cleaned my stock one out with carb cleaner. It runs MUCH smoother at idle now than it did before. Good idea about replacing the grommet though. Mine was a bit crusty. Very disappointed in my fuel milage. 16 this last tank.

jason191918

Bad PCV=Vacuum Leak. That is why your idle was rough.

MMA_Alex

the leaky hose could be the cause of a vacuum leak.

all the pcv does is when theres intake vacuum (higher rpm's) it sucks the valve open, and dumps crankcase blowby (the stuff that gets past the piston rings) back into the intake to burn.

It wont improve gas mileage, but it will greatly increase oil life

jason191918

Doesn't the valve close when there is vacuum to prevent a vacuum leak, and open when there is positive pressure? Hence Positive Crankcase Ventilation.

keithdphan

pcv sucks gases in crankcase out at high rpms. this is helpful b/c the sucking reduces pressures in the crankcases, thus negative pressure crankcase equal faster revving engine equal more fuel efficient.

MMA_Alex

sorry i had it mixed up a little

more vacuum at lower rpms. The vacuum closes the valve. move vacuum = less flow. The spring (or gravity on some) opens the valve when there isnt any vacuum

thook

http://en.wikipedia.org/wiki/PCV_valve

90inworks

Now that you said some thing yes the idle is perfect. it was whay worth the $4.85 lol.
So is there any other mods i can do to get a little bit better mpg? im planning on taking a trip this coming week and want to save as much fuel as i can.

jason191918

Cut Weight.

iamsuperbleeder

world-wide fuel crisis solved!

90inworks

I had the bed off for a week to prep it. dam did i get some good mpg. but the tires spun to easy. i got on the freeway the other day with it off. brod slid the whole on ramp, didnt meanto but it sure as hell looked cool lol