Question about 1993 Toyota Land Cruiser
I have a good radiator (been tested and cleaned, great flow), the head gasket has been replaced, the fan clutch has been replaced, the thermastat has been replaced, the water pump has been replaced and I am about to remove the therostat and le *** run with out one to see if that solves the over heating problem. The engine light just came on again. It came on before I had the head work done, and went away after the work. Now it is back on again, that part worries me. I am at a loss. It does okay at fast speeds, in town is bad. Any help or suggestions are greatly appreciated.
It would appear you have an airflow problem. Driving at highway speed the radiator is getting adequate cooling, but at low speed and stop lights you are not.
Run your vehicle up to operating temperature a then shut it off.
Open the hood and grab the fan blade and give it a spin. It should be very hard to turn (possible, but not free). If it spins relatively free, your viscous clutch needs replacement or fluid changed.
When this happens you have insufficient airflow across the radiator at low speeds. It is unnoticeable at high speed as you have driving airflow to cool the radiator.
To check your check engine light, Located the DLC1 connector pictured and short pins TE1 and E1 with the ignition on, parking brake set, vehicle in neutral.
Your check engine light will flash the codes at you. 2 flashes, long pause, one flash, long pause would be a code 21, for example.
To clear the code remove the EFI 15A fuse under the hood for 1 minute.
Posted on Sep 21, 2009
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Posted on Jan 02, 2017
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