jb451

Geez, its one thing after another with this truck... Okay, so before I did the timing belt, the truck sat because it would bog down really badly. If you give it any kind of gas the truck just does not want to go anywhere. After driving it around, i think i have made a correlation: The gauge will be at normal, then suddenly spike up all the way to hot. (The only reason i know its not overheating is because it did this with the engine only being on for 5 minutes, i could put and hold my hand on both the radiator and upper hose) Anyways, after the gauge has been pegged for a minute or so, the ECM will think the truck is burning up, and it sends the truck into limp mode. I know there are two sensors for the temp gauge and ecm, which one is the one for the ecm? Thanks again guys!

Justin

wyoming9

iTrader: (1)

Just what vehicle are you working on??

That might get more to respond to your question.

Are you having your MIL lite and what code or codes are you reading

If this is the 3.4 the coolant temp sensor is located on the front of the engine behind the timing belt cover under the fuel cross over pipe

jb451

whoops, sorry its the tacoma in my sig! No MIL, no codes whatsoever!

I thought this was the coolant sensor... apparently not, so what is it? (center of pic, in between hose and oil filter)


(same sensor, right above oil filter)



Whatever it is, its drenched in old coolant, so i thought that was why the truck keeps bogging down and going into safe mode. Guess not. And i'm still leaking coolant from somewhere. great.

rworegon

Coolant leaking from the oil cooler hose?
Have you topped the radiator off with coolant after the TB job? I always fill the block through the upper radiator hose after a TB change or radiator flush. You just may have an air pocket in the system.

jb451

I was going to drain it again and make sure the thermostat is opening, so ill be sure to do that when i fill it up again!!

JasonYota

iTrader: (1)

The sensor in your pics right above the oil filter is your oil pressure sensor. Just so you know

rworegon

If the thermostat is old or crusty, I'd pick up one and a gasket from the local dealer and pop it in.

jb451

Ah, i should have figured. Thanks!

RW, i replaced the thermostat and gasket when i did the timing belt. I did notice something strange, the top hose was hot, the radiator itself was luke warm, and the bottom hose was cold, so i think i have a bad thermostat, or clog in the radiator.

JasonYota

iTrader: (1)

That's how your radiator works. Hot coolant comes from the top hose of the engine and down through the radiator to cool and back into the engine to cool the engine

jb451

Yeah, but its not supposed to be ambient air temp, especially at idle with no air flow..