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NightmareImpala

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  1. voltage drop?

    in MechMan Alternators and 12v Accessories

    Posted

    With how your engine "bogs down" when you hit the bass at full tilt while only at idle this WILL happen when your voltage drops. The reason for it is that your alternator is demanding a higher output or else it cannot produce the amperage to charge your batteries. With this demand for high speed on the pulley, if you are at idle, it will call for high speed to charge back up and if you dont have that speed, it will put a ton of strain on the pulley of your alternator to try and get as much power as it can from the windings.

    Now i want to see if you can do this...

    Have your car off for awhile and let the engine get cold. Start the engine up and do NOT bump your system, just run the car for 5-10 minutes. Then feel your alternator, it should be cool to the touch, if its hot then its bad.

    Also if you have a multimeter, check the resistance of all your power and ground wires, it should not exceed .1-.2 ohms. If it does then that wire is wired poorly.

    I will try that tomorrow morning

  2. voltage drop?

    in MechMan Alternators and 12v Accessories

    Posted · Edited by NightmareImpala

    Does it do it all the time, even when your not playing your system? Does it steadily drop to 12.5 or just kinda spike down there. You know, I had the same issue with my DC alt. I called and talked to them and they said that my truck (2006 yukon) has a feature which if 14 volts is not required, the ECM will drop the voltage slowly to 12.5v for fuel economy. I thought they were full of shit, until a friend of mine looked into it some more and sure enough DC was right. I also run two xs3400's on a crescendo 3k at .5ohm, and i still sometimes drop to 12.5. after say 1-2min, the voltage will start to increase slightly until it stabilizes around 14.3ish. This may also be the same for your impala.

    No it only does it when the system it at full tilt and it just spikes down to 12.5 v. Maybe it could be a ecm problem

  6. voltage drop?

    in MechMan Alternators and 12v Accessories

    Posted

    I have a mechman 270 amp alternator in my 2005 lS with a mechman adjustable voltage boost module set to charge at 14.8 hot...

    Current setup is 2 xs power d3400 batteries

    1 aq2200

    Big 3 done with 0 gauge kicker hyperflex wire

    And 2 btl 15's

    Is it normal to have my voltage drop to 12.5 at idle with the system at full tilt? I wanna add a 2nd aq2200 and I am worried that my voltage will drop even more. When I hit the gas pedal and keep it at around 1500rpm the voltage stays in the mid 14's but I just want some outside input on this..

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