No air flow to radiator..... Need help!!!!!

 
Old 09-30-2015, 11:46 AM
  #126  
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Quick search http://www.hondata.com/forum/viewtopic.php?t=16698

Looks like the fan switch controls the fan still even with the override fan control checked

You can make the fan turn on earlier with that function and control the shutoff speed that is all.

So the fan oscillating will depend on your fan switch. The temp can vary depending on age of that sensor
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Old 09-30-2015, 01:00 PM
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Default Re: No air flow to radiator..... Need help!!!!!

Or eliminate the fan switch and give the ecu total control.
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Old 09-30-2015, 04:01 PM
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Default Re: No air flow to radiator..... Need help!!!!!

Originally Posted by turbohatch96y7 View Post
So did the fan cycle on and off at idle? Your target temp is 199 so the fan should turn on at that temp then turn off below that. Unless thats not how hondata works. I havent used it in a while.

Aem has 2 target points for temp.

On above 188
Off below 178


Also i would lower the rev limit on the over heat protection

Something like 5k
I don't even know how that parameter works. I just clicked it and did what you told me. Lol. The fan does not turn off at all at idle. This has to be because the temp is still to high. When I hot home from work I cut the engine off left the key turned so the fan was on and eventually the fan cut off by it self. So it does function correctly I just need to raise the temp that the fan cuts off at if I want it to cycle at idle. Now I have to figure out how to do that
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Old 09-30-2015, 07:45 PM
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Old 09-30-2015, 07:49 PM
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Default Re: No air flow to radiator..... Need help!!!!!

These Are the temps i see and i have he same fan as you and a shitty fluidyne radiator.

You can see when the fan kicks on and off. Notice the drain it pulls on the alternator by the rpm dip, afr jumps and timing advances.

keeps a solid idle with shitty 1000cc injectors
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Old 09-30-2015, 08:47 PM
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Default Re: No air flow to radiator..... Need help!!!!!

Originally Posted by turbohatch96y7 View Post
Wow it has to be something going on internally that won't let my temp drop. Or maybe just maybe it could be the temp sensor. I have a autozone one for the big sensor that goes to the gauge. And idk the condition of the small one the goes to the ecu. Maybe it's worth a try to switch it out.
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Old 10-01-2015, 07:21 AM
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No the ect sensor works independent from the fan switch.

When your fan turns on its should drop those temps especially at idle.

You got a legit spal fan right? The pics look just like my fan but idk.

Are you running water? Or coolant? I think you posted water wetter
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Old 10-01-2015, 07:27 AM
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Default Re: No air flow to radiator..... Need help!!!!!

Originally Posted by turbohatch96y7 View Post
No the ect sensor works independent from the fan switch.

When your fan turns on its should drop those temps especially at idle.

You got a legit spal fan right? The pics look just like my fan but idk.

Are you running water? Or coolant? I think you posted water wetter
The motor has spal stamped on it so it should be real. A bought it from Amazon. And yes water wetter and distilled water. I was thinking maybe the temp I'm getting from the ect sensor may be high because of a worn sensor that doesn't have the right resistance and if it shows 190 when it really may be 165 then my fan will never cut off because the ecu still sees 190. Just a thought.
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Old 10-01-2015, 07:53 AM
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Yeah that could be a possibility

Do this next time the motor is idling feel the bottom rad hose

Check when th motor gets to 150 and feel it

Then again at 170

Again at 180-190

You should be able to tell when the thermostat is opening and compare that to what your ect is sending

When my fan is cycling i can feel the lower hose get hard (thats when the thermo is closed)

Then as the thermostat opens around 185 the fan kicks on again and the hose gets soft because the water starts flowing.

My temps drop and the thermo closes. Andnit starts all over again.

This is how it should work



Make sense ?
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Old 10-01-2015, 10:39 AM
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Default Re: No air flow to radiator..... Need help!!!!!

Yes that makes sense. I know it does open but never checked to see if it closes
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Old 10-01-2015, 12:10 PM
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Default Re: No air flow to radiator..... Need help!!!!!

Use a multimeter to check resistance on the coolant temp sensors and the fan switch. Granted when one goes bad they don't activate the fan.

Something is causing the fan to stay on. Either it's a wiring problem (where my money is), or it's a sensor problem.

It might come down to you chasing the harness to see if there's a wiring problem. It's possible a wire has rubbed through or something.
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Old 10-01-2015, 12:35 PM
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The temp he has it set to and his fan switch is keeping the fan on. The wiring is ok

The problem i see is the temp should be able to drop down to the 170s with that fan.

From what i understand, at idle his fan is constantly running and it shouldn't.
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Old 10-02-2015, 02:41 AM
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Default Re: No air flow to radiator..... Need help!!!!!

170s? Mine will never get below 190 on a cool day.
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Old 10-02-2015, 04:32 AM
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Thermostats arent only for cold starts
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Old 10-02-2015, 05:03 AM
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Default Re: No air flow to radiator..... Need help!!!!!

Originally Posted by turbohatch96y7 View Post
Thermostats arent only for cold starts
I'm just saying, a fan wont fix underlying cooling issues.
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Old 10-02-2015, 05:13 AM
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Right. Thats what im getting at

In op case the fan is a band aid to the cooling system. He can leave it as is or figure out why his engine is running so hot at idle.
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