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Very weird heating issue

 
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Old 04-03-2013, 01:22 PM
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Very weird heating issue

The temp gauge in my 4th gen prelude (f22b2) goes up whenever the car comes to a complete stop and as soon as i start moving again it goes back to normal.

The weird thing is I don't think the car is overheating, whenever the gauge goes up and I check the radiator everything seems OK (no boiling...) the fan even chips out as normal even though the temp gauge saying the car overheating.

What could cause this?

Could the car be overheating without showing signs at the radiator?

Also i'm wearing a 0.9 radiator cap is that the right cap?
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Old 04-03-2013, 01:46 PM
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Re: Very weird heating issue

Sometimes the needle goes all the way to the max if i dont move off?
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Old 04-03-2013, 04:52 PM
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Re: Very weird heating issue

temp sensor could be bad
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Old 04-03-2013, 06:23 PM
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Re: Very weird heating issue

yea either the temp sensor or the gauge itself...

i have both for sale if your interested, both in working condition.

the temp/fuel cluster
$115 shipped anywhere in the US

ill have to give you a price on the sender another time.
lmk if your interested.
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Old 04-05-2013, 08:51 AM
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Re: Very weird heating issue

X2 on the sensor. Or an air bubble
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Old 04-05-2013, 10:41 AM
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Re: Very weird heating issue

when was the last time you did maintenance on the radiator?

1. dont ever open the rad cap when you think the car is over heating unless you want your face to melt off.

2. put in a new t-stat(find one thats fail safe)

3. do a coolant flush.

4. pick up a new ECT sensor
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Old 04-09-2013, 11:58 PM
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Re: Very weird heating issue

I've been having the same problem with my car ever since I got it. I replaced EVERYTHING; sensors, switches, the gauge cluster, the radiator cap, the thermostat..bled for air a bunch, pressure checked the system, flushed the coolant, cleaned the fins, added a cooling additive...pretty much changed out everything but the radiator itself and the sensor wiring. The car still did it, so I installed a second ECT gauge with a needle I could watch to see if it moved around when the stock unit started showing hot (Needle would barely move, but not to overheating temps).

Recently while tuning the car, my tuner had a program that interfaced with the ECU that showed him everything in detail, including the temperature. I had him ride around with me until the gauge started reading hot so I could compare it to the reading the ECU was giving out- turns out 1 block above normal on the stock gauge was 190*, and the red block lit up a little after 200*. You'll get a check engine light if it gets to 220* which is actual overheating.


Anyway, yeah..keep replacing things, run a second ECT gauge, or find a tuner that knows how to pull that info from the ECU. Good luck.
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