my1rstls1

i have a 2002 z28 stock car just purchased 3 days ago drove fine until now i noticed the pcv hose running to the intake was cracked and clogged with sometype of rubber cement by previous owner.i removed it and replaced the pcv valve and the portion of the hose wit just 3/8 fuel hose now i have no pcv valve. also i seafoamed the motor thru the intake by using the port where the pcv connects.after driving for a while clearing the carbon build up out i have 2 codes p0171 and p0174 which is fuel trim to lean bank 1 and bank 2.long story short which is more likely the problem pcv hose or o2 sensor.

please help this is my daily driver vehicle

The_Bishop

iTrader: (10)

You need a PCV valve.

poltergeist 02

iTrader: (65)

i have heard bad things about running sea foam through the intake. some have good results and some don't. i would think you killed the o2's with the sea foam. and you should realy run the pcv valve.

poltergeist 02

iTrader: (65)

wait... if your sucking extra air that can't be monitored by your maf this may cause an issue.

my1rstls1

so i need a pcv well the hole hose cost 142.99 from the dealer i dont see any obvious vacum leak but definatly seem to hear 1 but failed to locate it so far....however i also heard some times seafoam can kill my o2s so i dont know which to replace first they cost the same.

my1rstls1

just trying to figure which most likely is the culprit .......seafoam? or no pcv valve?

poltergeist 02

iTrader: (65)

personally i would start with the pcv valve.

my1rstls1

thanks alot tomoroow i will try to find a valve to fit in with out buying the whole assembly

O2Form

Of course its going to run lean without a pcv valve...........

my1rstls1

what if i cap off the connection and install a breather in its place for time being?will that be harmful?

my1rstls1

also could this lean issue makew me lose performance?

3.8blackmaro

Uh yea, its not getting enough fuel. Running lean also makes it run a little hotter.

msydow

i have built a couple of hose assemblies out of fuel line. just get a pcv valve for a 95 chevy with a 350 and build around that.

my1rstls1

any 95 chevy?

Lt1Porsche

iTrader: (6)

The PCV acts as a check valve, your going to be sucking extra air without one. Not to mention all the blowby in the world.

Steve Gunn

You can replace your entire system with fuel line, brass fittings and misc stuff you can buy from any auto parts store for around $20.00. First, search this site and educate yourself on how it works and how it's routed. Then replace that factory crap.

my1rstls1

thanks everybody it was the pvc valve and i fixed it using some hoses and clamps glad my car is running fine again