My car is reading a little low on the voltage with the engine running.

ng8264723 · #1 (**permalink**) 07-21-2010, 02:17 PM

What are you guys running? Mine is around 12.5
Chris

Tommy · #2 (**permalink**) 07-21-2010, 02:28 PM

If it's showing the same voltage with the engine off, at idle and revved to 2,000 RPM, you have a problem. Mine shows 14-15 volts while cruising at 2,400 RPM.

twobjshelbys · #3 (**permalink**) 07-21-2010, 02:30 PM

In addition to the above, try switching on and off your aux fan and see if it changes. It might not be a steady state difference but you should see the step. If not, yep, problem.

JBCOBRA · #4 (**permalink**) 07-21-2010, 04:40 PM

How about just turn up the idle speed a tiny bit?

CowtownCobra · #5 (**permalink**) 07-21-2010, 04:48 PM

If you don't have a 3rd gen Ford alternator, get one...

pusherfans · #6 (**permalink**) 07-21-2010, 06:15 PM

12.5 with 3 fans and two blowers on. 14.5 with nothing on. I had a problem where it stopped charging and after 3 regulators and 2 alternators, something told me that these were not the problem. We tightened a bunch of wire connections (like battery, starter, etc) and the problem went away. Of course we traced wires, etc and it took 3 weeks, but it ended up being one of those. we also replated the starter "lug" with all the wires going into it.

It took 3 weeks, but it looks like it was just lose wires