99 Q45t alternator good or bad?

[mrpeeb240]

my alternator only puts out 13.60at idle/13.92revving , could this low voltage be causing my car to run whacky?

[Infinitiguy19]

http://www.aa1car.com/library/charging_checks.htm

[loystock]

That's a low voltage. And yes, crazy things do happen when alternator is failing. Regulated output voltage should be 14.1-14.7 VDC. Current is also limited, depending on the RPM and voltage may drop as low as 13.5 VDC when electrical load is excessive.

Make sure the alternator drive belt is not slipping. Ensure battery connections are clean and tight. Rev the engine between 1500-2500 RPM and measure the voltage. If the voltage is still not in spec, check the alternator connectors and wiring as well as ground points. If still out of spec, there could be a problem with the alternator's internal voltage regulator or one or more of the power diodes have failed.

[qship96]

my alternator only puts out 13.60at idle/13.92revving , could this low voltage be causing my car to run whacky?

looks like normal voltage output to me.

[mrpeeb240]

I really appreciate the detailed response, I will go through and check everything tomorrow

thats Gold Jerry Gold!!

[mrpeeb240]

thanks paul very informative link