was hydraulic fan now electric 4.7 fan

From: Michael Kuriger (michael@isuzu-mods.com)
Date: Sun Oct 29 2000 - 18:25:06 EST

Remember, you never get anything for free. Although there is PS fluid flowing,
adding a resistance to it will just add drag from the PS pump itself. Same as an
electric fan. It just adds drag at the alternator.

I did a test today. I have no direct fan, just the electric AC fan. I also have
the stock 195 thermostat. With the truck idling, the engine quickly warmed up to
normal. I turned on the AC and the electric fan kicked on. the temp stayed about
the same (on the guage) It was reading about half way between 210 and and the next
line down (the 160 mark?) I turned off the AC and let the truck idle for about 20
minutes. The temp slowly crept up almost to the 210 mark and the electric fan came
on. The temp quickly went back down to normal and the electric fan stayed on. I
turned the AC back on, no change. I turned the AC off, electric fan was still on.

So I'm guessing there is some sort of logic controller for the electric fan. Is it
possible the computer will adapt to not having a manual fan and start using the
electric fan more often?

Also - what is the procedure for reesetting the computer? Is is as simple as
pulling a fuse of negative battery terminal?

Thanks!!! 

--
-=Mike Kuriger
1991 Isuzu Impulse RS 1.8
2000 Dodge Durango SLT 4x4 4.7
http://www.isuzu-mods.com
http://www.twistedbits.net/WWWProfile/dakota/NgFQdD9vkNHNg

Jim Miller wrote:

> Anybody see the fan used on late model Camrays and Lexus models?  It is neither
> electric or driven by the engine belts rather it uses the flow of otherwise
> wasted power steering fluid already circulating in the power steering system.
> Now we all have a power steering pump that runs all the time and I don't think
> any of us would want no power steering on our daks so what does it cost to let
> it run the fan to cool the radiator.  It is silent also.  Find one and check it
> out!  I think it is on all late model V6 and maybe V8s also.  They have been
> using this fan for several years.  It uses very little underhood space also.

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