Oky guys I was cleaning my engine bay yesterday after I clean it I turn the car on n let it ran for 10 to 15 mins letting it dry.

this morning I woke up n started the car let it ran for 5 mins n drove it off about 2 mins down the road th temp went to high back down to low back to high n back to low and it went to high n it just stay high got off the ext pull to gas station open the hood n every thing looked fine.motor was warm n radiator hose was warm.I can keep my hand on the motor n hose.

Ls v tec motor just got the car 1 day ago.texted the old owner n he said he just use water n not coolent could this be a prob. This morning the temp was about 55 n it was raining.also car does not have a reservoir tank
Thanks guys.


Also remember that when I was clean the motor a blue wire that was hook up to the motor came lose.so I hooked it back up to the motor could this be a prob?.

 

Drain the water and put in a 50/50 mix of antifreeze and water, make sure you properly bleed the system.

I would hit up your local bone yard and find and install the overflow/reservoir tank, there is a reason it is there.

If engine temp seems to stay normal, rad fan(s) turn on when they are supposed to the the problem is your temp. gauge, sending unit, [ECT sensor] or the wiring between them.

A rapid up and down change in temp. gauge readings, [without engine actually overheating] is an indication of air in the cooling system, try bleeding it.

Without knowing the MM&Y of the car, what year of car the engine harness is from and where on the engine the blue wire is, there is no way to know what the lead is for.

The ECT sensor has two (2) leads, [red/white - green/black or green/blue, 94-98 Integra and red/white - green/white 90-93 Integra. 94

 

So I bleed the air n change it to half n half coolent but now the temp won't even move..so maybe the temp sencer is bad how do I know witch wire is witch there is a brown color wire that is not hook up look like it came lose .

 

MM&Y of car would help.

ECT sensor lead is yellow/green on 2nd and 3rd generation Integra, 90-98. 94

 

It's a

Ls.vtec obd1 integra

 

Single wire, yellow/green below distributor assembly. 94

 

This guy is a pro....

You say your MM&Y and he spits out wire colors!!!!

Also, if you temp is staying low, cck both hoses? Maybe u damaged the temp sensor from washing the bay

 

Pro, maybe, but I can read a Haynes manual as good as anyone. 94

 

In my 94 LS teg my gauge doesn't even move unless I let it sit and idle, then it'll go to about 1/3 of the way, and 2 miles down the road, back to zero. Doesn't overheat. I just figured it was because of the full rad and not a half, so it just stays really cool.

 

That is not necessarily a good thing, around 190 degrees F is normal engine temp., the rad fan will turn on at just over that, the engine runs best at normal engine temp., a cold engine is inefficient, it wasts fuel, it will be low on power.

The ECT sensor is constantly feeding engine temp. to the ECU/ECM so it can adjust A/F ratio, a cold engine runs rich, [poor gas mileage].

You need to change your thermostat it is most likely stuck open. 94

 

if it even has a thermostat

 

Yea, I just bought the car for winter while I rebuild my h22 civic. I haven't done anything besides change the oil in it and I've had it for over a month now, lol.

Guess I better go over it this weekend.