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!!!

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!!!


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?

What oil and filter do you use?

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

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 ?

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!

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

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

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.

http://www.automotiveforums.com/vbulletin/showthread.php?t=333580&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.

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

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.

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 ;)

Jesus, stop over doing the seafoam treatment.

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

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

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.

well ok then what is the amount and types of cleaner should i use in my 89 s-10 blazer 4x4 4.3L TBI with over 200,000 miles under the hood?

for one, one can would have done the whole job.

1/3 in the tank, 1/3 in the oil and 1/3 through the PCV line.

ok you win lol...

i was gonna say just give up blaze he knows whats he doing.

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


Hold on there Big guy. Do yourself a favor and save a few bucks. With each and every flush you run a risk of dislodging junk from your engine that may ultimately end up wiping out a bearing. I am the first to agree that a flushing an engine can be a good thing. I just flushed mine last night. But I also lost an 1982 Olds V6 engine by using repeated additives. (Threw a connecting rod that punched a 6 inch hole in the block!) I keep the twisted connecting rod on my desk to remind me that more is not always better.

PLEASE do like BlazerLT says and use moderation. You could be doing more harm than good.

You got your truck running good now, Right? As they say in the South, "Let sleeping Dogs lie". If you are heavily dependant on your truck and can't afford to replace it, I wouldn't experiment with it. Keep a good maintenance program going and save your money. If you start having problems, then work towards a fix.

Thanks guys, I'm glad people understand that I am only trying to have them clean there engine without damage.

yup she runing good now i think i need a new gasket betwen my tbi and intake is it a pain in the azz or is it farily easy it dosent look to hard

You just can't leave that damn thing alone...can you? :)

yup she runing good now i think i need a new gasket betwen my tbi and intake is it a pain in the azz or is it farily easy it dosent look to hard

Stop screwing around replacing things that don't need to be replaced.

yup she runing good now i think i need a new gasket betwen my tbi and intake is it a pain in the azz or is it farily easy it dosent look to hard

What makes you think you need to replace the gasket? You've told us that the truck is running good, Right? You're gonna end up walkin' to work if you don't quit F@#*ing around with things that don't need to be replaced. Stop while you're ahead!

ok i no its bad beacuse it hisses realy loud

Hisses as in a vacuum leak?

ok i no its bad beacuse it hisses realy loud

You sure you didn't just forget to re-connect a vacuum line while doing all of the other work. Check out the top of your engine real good before tearing it down

i have a 91 s-10 blazer that had no oil pressure for a long time, i think i had gunk in my oil pan, then i put some seafoam in it and it cleared it right up, so i doubt that that had anything to do with your low oil pressure, my oil is always around 20 at idle and 40 while running, however you have hydrilic lifters and one of them may have bled down and caused it to knock. thats about the extent of my knowledge.

How long has the seafoam been in it?

How much seafoam did you put in?

i put the seafoam in about 6 months ago and i put a whole can in, however i havent had time to do an oil change since then and it has been sitting for other suspension reasons

First of all you are only supposed to put maximum 1/3 of a can in.

Second, you are supposed to change the oil after maybe 200-300 miles after putting it in.

You need to change the oil ASAP! Not a week from now, not a month from now, IMMEDIATELY!

Have you driven it at all while the seafoam was in it?

ive driven it quite a bit, and the reason i left it in is because the valley where the intake manifold sits on is full of gunk that i noticed when i put a new manifold on, however it isnt driving right now, i need ball joints on it first. that and i go through oil so fast anyhow because my dipstick tube is broken and it spits oil, it doesnt really make that much of a difference.

hi guys im back well today i was fidling under the hood and i blew into the line that is supose to suck air into the crankcase it felt like thare was some resintance and i noticed that as i blew air in it came out the tbi!!! is this normal or is something very very bad

Yes, it is supposed to put the PCV gases back into the TBI for reburning.

That is the whole reason for it.

ive driven it quite a bit, and the reason i left it in is because the valley where the intake manifold sits on is full of gunk that i noticed when i put a new manifold on, however it isnt driving right now, i need ball joints on it first. that and i go through oil so fast anyhow because my dipstick tube is broken and it spits oil, it doesnt really make that much of a difference.

Go change the oil, that much solvent in your oil for that long is MURDERING your bearings.

just replaced the tbi gasket today i recomend any one who thinks they here a hiss or just think its bad change it its realy easy. and i think it runs smoother now to ;)