Truck is Acting Up

Nimrod777

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About a week or so back, my heater wasn't, so I checked the radiator level and it was good. Heater started working a bit later.

As of yesterday, heater isn't producing again. Last night on the 10 minute drive home, the Check Engine light came on, and I noticed my temp gauge was red-lining. Still not blowing any heat. Turned the blowers on high anyway, coasted when I could, and the light went off, temp dropped down a hair.

Thermostat gone? Or does the radiator need a good flushing?

Toyota '94 pickup
 

Nimrod777

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Well, know that I haven't done any sort of coolant flush in... well... how old are my kids now...

OK, ever.
 

ImThere

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Thermostat or water pump one of the two it sounds like a no flow to flow problem leading to the thermostat not opening. If the system was dirty or bad heater core some heat would still come out of the heater and your truck would just run hotter than normal
 

Camp David

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Go to Auto Zone and have them pull the code. I believe it's a P0125 that indicates a faulty thermostat and/or coolant temp sensor. My money would be on the thermostat.
 

Diehard Hunter

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If you haven't ever flushed your radiator, don't start now. I made that mistake once, and the flushing opened up all these little pin holes. Then I had to replace the radiator!
 

HuntingDicksonDTC

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if it has several miles possible head gasket, p0128 is code for thermostat on newer vehicles. but that 94 wont have that capability its obd 1
 

Kingston

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Are you using a TOYO oil filter?? If not switch to it and that should fix you rite up. If using a Fram, just run the truck over a cliff. :grin:
 

Unicam

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If the system has water in it, hence the gauge reading. I would look at the thermostat like most have said. Also, pull the dip stick, oil filler cap and radiator cap and check them for a brownish, watery looking mixture to rule out the head gasket. If the water pump is going you should get a leak/seepage from the weep hole, but not always. A trick I use is to get some cascade dishwashing detergent add a cup full to the radiator and drive the vehicle at operating temp for 45 minutes. Then flush system completely, change components and service with good anti-freeze. The cascade cleans the cooling system very well.
 

Nimrod777

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Kingston said:
Are you using a TOYO oil filter?? If not switch to it and that should fix you rite up. If using a Fram, just run the truck over a cliff. :grin:

Oh. Em. Gawrsh! That's it! I was in a pinch and bought a generic oil filter at the REGULAR PRICE!!

You're a gem ;)
 

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