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-   -   electric fan drawing too much current?? (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/electric-fan-drawing-too-much-current-784196/)

gkarmadi 09-03-08 02:49 PM

electric fan drawing too much current??
 
Hi..

I got an electric fan, sensor and relay combo along with fd alt and ultima red top batt.

When the fan is off (water temp below 180*F), I see 14.5V on my volt meter gauge. But once the fan is on (water temp at 180*F), my voltage drop to 12.5V at idle and 13ish Volt at cruise. Back to 13.5ish Volt at wot.

Is this normal??

JM1FD 09-04-08 10:04 AM

Sounds a bit on the low side. My FD has never had trouble keeping 13.3+ volts with both fans as well as the A/C blower running full tilt. Are you underdriving your alternator? Even though you're on the low side I would say that it is probably nothing to worry about if you aren't having trouble getting it started.

gkarmadi 09-04-08 02:11 PM

No prob getting my car start. I do see 13V+ at cruise and wot (w/the fan's on), just that at idle it went to 12.5V (w/ fan's on).

What is "underdriving" an alternator?? is it like a loose belt tension or too tight belt tension? I am running two belt from alt pulley to main pulley.

JM1FD 09-04-08 03:56 PM


Originally Posted by gkarmadi (Post 8523753)
No prob getting my car start. I do see 13V+ at cruise and wot (w/the fan's on), just that at idle it went to 12.5V (w/ fan's on).

What is "underdriving" an alternator?? is it like a loose belt tension or too tight belt tension? I am running two belt from alt pulley to main pulley.

Underdriving is spinning the alternator at less RPM than it should be spinning at...usually accomplished by putting a larger than stock pulley on the alternator.

gkarmadi 09-04-08 10:10 PM

I will check the pulley size...
(I believe its the stock size for a double belt).


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