when my car is running, usually after it gets hot, the pcv breather starts blowing white smoke. what is causing this? internet tells me the piston rings are bad and combustion is occuring where it should not. are there any other possibilities? (preferably with an easier fix). can it cause further damage to the engine by running it as this is happening? should i unplug it? is it bad for this smoke to get back to the air filter and down the carb?
any help is appreciated. thanks
You are still implying to me that the plumbing to the gas tank is messed up.....
Did you figure out 'why' you keep running out of gas?
Could the lines running back there have gotten mixed up?
One reason I ask this is because one (well two that go into one) of the lines leading to the gas tank is it's air vent, or charcoal canister. If this is not working or plumbed correctly, you will get 'blowby' or smoke and oil spitting back into the air filter.
If you are getting oil into the air filter as well as smoke, please confirm this and I will walk you through one set of tests.
First off you need to pull out the front PCV valve and confirm it rattles freely. If not, replace it, it is the likely cause if bad.
If just smoke, then maybe it is time to change the air filter on the gas tank vent. When this $2.00 filter blocks up from mud or dust, it puts a vacuum on the gas tank which 'will' act like the engine runs out of gas. You can be driving along and then it starves for gas and bogs, then it stalls and acts like there is no gas. A quick test for a blocked filter is to open the gas cap when it 'runs out of gas'. If you get a hiss and it runs again, the filter is more than dirty, it is blocked.
I have had to come home from the mud pits with the gas cap open several times.
The filter, sometimes called an evaporation system or emissions filter, is on the bottom of the charcoal canister and is a 'real' pain in the butt to change the first time. I needed a hammer and chisel to get my filter out of the canister and many squirts of penetrating oil on the clamp. Actually I think I gave up on the clamp and just unbolted it from the firewall. Once out, the new one just tucks in.
This filter is supposed to be changed the same time as the spark plugs.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06Poor oil change maintenance and the cheapest gasoline will clog the orifice port just below the carburetor plate, clean all connections:
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