blazerboy2005

i think i just f,d my salf in the A! i just ran seafoam in my break booster line and put the rest in the crank case then went for a test drive my oil psi droped like a rock its 40 aid rev and about 20 at idle and thare is a ticking coming from under the truck and i just found out my pcv vale hose has no vaccume going to it!!! please help me any body im broke and i really need this truck!!!

Rick Norwood

The first thing you do is change your oil and filter and get that stuff outta your system.

Be a little more specific about your PCV valve. If you remove the PCV Valve from the rocker arm cover and start the engine, does it rattle and make noise? If you pull the PCV vlave from the hose does the engine stall?

BlazerLT

What oil and filter do you use?

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blazerboy2005

i use napa gold for my oil filter and no if i pull my pcy valve of wile its runing it dose not stall thare is no vacume going to it wile the truck is runing i think the port on my tbi is cloged should i be able to blow air threw the pcv port or is thare a valve in the tbi port

TonyMazz

I agree, could have dislodged a boat load of gunk and plugged your filter, hence drop in oil pressure for a moment...maybe.

Install new oil, filter and pull the pcv line off and flush with cleaner to see if it's plugged.

How many miles on the motor ?
What type of motor ?

How much seafoam did you suck in the brake booster ?

Rick Norwood

Do what Tony says. Go down a buy a BIG can of Carburator Cleaner, pull the PCV hose off and spray inside the hose port. If you can, get something like a small screwdriver or a rolled up rag into the opening to scrape the gunk out with the engine off. Keep spraying the cleaner and letting it soak. Spray the PCV valve too, or replace it!

DO NOT FLOOD OUT YOUR ENGINE BY SPRAYING THE WHOLE CAN INTO THE OPENING AT ONCE.

Once you get most of the opening cleaned out, you should be able to re-attach the hose and start the truck to see if you have vacuum through the port.

Change the oil and filter FIRST!

blazerboy2005

my pcv valve is new and my oil psi went back up but i dont get any vaccume from that port should i be able to poke a small nail threw the port hole beacuse i tried and the nail stops about a 1/2 inch in and i have a 89 s-10 blazer 4x4 4.3l tbi so i think im going to try the carb cleaner can someone describe how that vaccume port works so i get a better understanding on whats going on inside of thare

Rick Norwood

Did you change the oil and fliter? Or did the pressure just go back up?

TonyMazz

A crankcase ventilation system is used in order to provide a more complete scavenging of crankcase vapors. The air cleaner supplies fresh air through a filter to the crankcase.

The crankcase mixes the fresh air with blow-by gases. This mixture then passes through a crankcase ventilation valve into the intake manifold.

The primary control is through the crankcase ventilation valve , which meters the flow at a rate depending on the manifold vacuum.

In order to maintain an idle quality, the crankcase ventilation valve restricts the flow when the intake manifold vacuum is high.

If abnormal operating conditions arise, the system is designed in order to allow the excessive amounts of blow-by gases to back flow through the crankcase vent tube into the air cleaner in order to be consumed by normal combustion.

wolfox

http://www.automotiveforums.com/vbul...0&page=2&pp=15

Get a look near the top 1/3 of the second page of posts to get an idea of how to use Seafoam. I personally would *never* drive on a crankcase filled with the stuff. Just let it idle for 20~30 minutes to let it work it's way through the engine and then change your oil and filter. Yer done.

BlazerLT

You sure you have the right line?

The one with the PCV valve on the end of it will never cause the engine to stall, but the rpms will go up.

I would remove the PCV valve tube and clean it out, it could be junked up.

Also, make sure the fresh air intake going to the other valve cover is clean as well.

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1995 Factory Blazer Service Manual for sale, PM if interested.

blazerboy2005

ok guys i fixed it the port was badly colged i used a whole can of napa tbi cleaner to get the damn thing clear and while i was at it i cleand all the ports now she runs verry good. and i only put about 1/8 of a can or seafoam in the crank case i put one can in the gas tank and was finly able to put 1/3 through the pcv hose and by the way my truck has over 200,000 miles on it but dont tell her that ok

BlazerLT

Jesus, stop over doing the seafoam treatment.

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1995 Factory Blazer Service Manual for sale, PM if interested.

blazerboy2005

hay i will dump as much shit that i can buy in this motor to keep it going as long as i can thank you... and hay i think this moter has so many carbon deoposits in it i could flush it 10 times and the oil would still come out dirty

BlazerLT

NO!

Overdoing it can cause more damage than it will help.

Learn to practise moderation when it comes to additives. Double the amount doesn't always mean double the cleaning.

__________________
1995 Factory Blazer Service Manual for sale, PM if interested.