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Re: i have a 92 4runner its smoking
You mean Steam, don't you. Your thermostat may be bad. And is not opening up to alow the water to circulate. The thermostat is located following the hose from the radiator to the thermostat housing. the thermostat has to be replaced.
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either you have a bad thermostat or you have a air lock in your heater hoses remember your heater is fed by the hose by the upper rad hose return is the hose going to the water pump, to bleed the air out fill rad leave the rad cap off start engine run for 5 min. the check the coolant level,fill to top of neck replace rad cap tight, K-D tools make a special funnel to solve this air lock problem
Check your gas cap, make sure it's tight or replace it. If after a new cap your light is still on, you should have a smoke test done on the EVAP system to find the leak. Filler neck's tend to crack, very hard to diagnose without a smoke test.
you could have a pin hole in the rubber pipes. or gasket blown. as for cold air that can be a blocked internal rad for the heater or the switching for the diverted is not working. if you losing a lot of water or just a bit it will give off white smoke also known as steam. check were it is coming from get engine up to running temp and wiggle pipes about faveret place for a pipe to go is the top rad pipe.
P0455 indicates a large leak in your Evaporation emissions system. This system stores fuel vapor from the fuel tank in a charcoal canister where it is later purged and burned in the engine.
The most obvious cause for this would be a loose gas cap. If the cap is tight then you can carefully inspect all of the evap hoses for cracks. It is very common for these to crack and leak on all chrysler products.
If you don't see anything obvious than your next step is to have the evap system smoke checked for leaks. The smoke will be introduced into the evap system under slight pressure. Wherever the smoke comes out is the source of the leak.
If no leaks are found than the usual suspect is the NVLD (Natural Vacuum Leak Detection) pump. Another common failure on chrysler products.
Did you run engine from cold, with heater on when you refilled the system? Try again, rad cap off, with heater on, and let engine get up to operating temperature, make sure you have good flow through rad ,leave cap off, until rad fan comes on to cool returning coolant to rad at least twice. Give engine a little extra rev, for 5 seconds or so, every once in a while to make sure flow getting through heater core, and add coolant as necessary. See if that helps, as it may just be an airlock in system. If your cooling system has any bleed screws incorporated, crack them once in a while as well.
Providing the head gasket was done properly, and the head was checked for cracks, it's probably a cracked block. Not what you want to hear. Did you have the head checked when you had it off? Do you have to add antifreeze often? Remove the rad cap, and let it run. If bubbles keep surfacing up to the filler hole, you have a crack, or your head gasket is still no good.