So I thought this problem went away but apparantly it hasn't.

Flashback - 2006, body kit goes on, car overheats (due to blocked air), water pump craps out (was leaking from weephole), was replaced by mexicans that aren't licensed to work on car (just found this out), not sure what all they replaced (didn't replace/do), and the car would heat up, temp gauge wouldn't work. I tried replacing the coolant temp sensor, thermostat, did a radiator flush, bled the lines (then snapped the screw...ugh...) and all was well until today when i drove it for a half hour, had the cool air blowing (not AC), and let it sit in park idling for about 10 minutes, when i came outside to leave the car was steaming a little and the coolant was shooting out of the overflow tube until the resevoir was empty.

So I let it cool off, opened the cap, filled it with water and ran it then noticed that the cooling fan wasn't kicking on even after i turned the AC on. I checked the fuses (the 30 amp and the 10 amp) and am waiting to get the big block fuse tested tomorrow to see if thats the problem. Other than that my computer has been throwing 2 P0118 codes for awhile now, and when i erase the code the gauge will work but after awhile it will stop.

It was suggested to replace the block fuse and pull the thermostat so that it's constantly running through

and I was suggested to put another new water pump on.


Any other ideas or tricks to try? It's the 99 2200 motor btw.

Its usually not a good idea to run with no thermostat on the street, that may seem to make it less likely to overheat, but it isn't going to fix your underlying problems with overheating.
You need to check your fan relay (replace if its bad), check the fan itself (even if you have to jump the leads on the battery, make sure it spins), replace your thermostat (try a 180 degree one if you let the car idle alot), and so forth. Running on the street with no thermostat and an otherwise functional cooling system may cause your car to run rich because the computer will constantly get a low engine temp signal and enrich the mixture in an attempt to get the engine warmed up. Bad for gas mileage, hard on the injectors, will eventually ruin the cat, bad for the environment, and could make your friends say "Damn, why does your car stink like gas?". Plus, your engine will run like crap. BTW, the P0118 indicates an overvoltage in the temp sensor. Maybe when those "mechanics" replaced the pump, the circuit to that sensor could have been damaged, check that out too. Hope this helps.

very helpful. most people i talked to said that it was the coolant temp sensor or the wiring to that was damaged, so i've replaced it twice and nothing.

I figured with taking the thermostat out would help alot because the engine gets hot really quick so it would balance things out.

Also do you think maybe i have a clog somewhere?

A clog, doubt it, unless some sort of of mutant bacteria that lives on coolant decided to take up residence in your cooling system, become fruitful and multiply. I'm still leaning toward a problem with your temp sensor/wiring. That would definitely cause the trouble code, and likely cause your fan to act stupid. Did you check the wiring for that sensor all the way to the main harness?

no i can't really follow it too far, we tested the relays today, they work, tried unplugging the CTS and seeing if the fan would kick on, nothing, and then checked forever to find nothing else really.

One thing i did notice and it bugs the hell out of me, the CTS sensor was looking pretty haggard (a little corrosion, looked burnt) but what baffles me is that if I replace that AGAIN, whats it going to do? last 2 times it's done nothing but cost me $40.

Fan motor maybe?

Sounds to me like a problem with the wiring. Perhaps causing the sensor to fail prematurely. check the wiring all the way to the main harness, even if you have to take some parts loose. And the fan motor shouldn't have any effect on the sensor, the sensor sends its signal to the PCM, which tells the fan relay to close or not.

i had the same code and it was a broken wire on the harness that went to the coolant temp sensor.

how far along do i have to follow or where is this harness located at that i can find it/repair it?

If it IS the wiring, odds are its somewhere between the sensor plug and the main harness, it would be VERY well protected in the main harness, BUT, don't count it out if you don't find any problems in the wire before the harness. But like I said, odds are if there is a problem in the wiring, its gonna be before you get to the main harness.

over voltage, under voltage, all seem to be wiring issues. I would say get a couple wires and jump it to the harness directly, see if that clears your issue. Then just run new wiring. It isn't that long of a wire.... oh wait, thats in a 2.4. I don't know how long your wire is, but give it a try none the less.



Scott

When I boost, you boost, we boost
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