Jump to content
Sign in to follow this  
forsellb

MechMan alt / XS power 3400s

Recommended Posts

I have a 220a MechMan alternator with two runs of zero going to the two XS power S3400s in the back. Nothing except the alternator is connected to the cars main battery but yet my cars battery is running at 16.5+v. The voltage jumps around like crazy to, no predicting it. Why is it doing that and what can I do to get it to sit at a stable 14.1-14.4v?

Share this post


Link to post
Share on other sites

What are you using for a voltage meter?

Share this post


Link to post
Share on other sites

Stinger, and my regular car battery warning. When it sits above 16.5 it throws the battery warning.

Share this post


Link to post
Share on other sites

Try a dmm to confirm the voltage.

Share this post


Link to post
Share on other sites

sounds to me like your voltage regulator has gone bad.. check it with a DMM and if indeed it is spiking contact mechman.

Share this post


Link to post
Share on other sites

oh, and dont drive it anymore ... high voltage can kill your cars computer. your head unit, and some amps

Share this post


Link to post
Share on other sites

Sad day. I'll check it with a ddm in a second, I'm actually out right now but I'm headed back. Thanks for the heads up though! I already had one new computer put in this car, don't wanna do it again.

Share this post


Link to post
Share on other sites

Stupid question, but I got stinger zero and I ran out of zero Ga when installing it so I used some thick 4 Ga, could that be it by any chance? ( 4Ga on the extra batts and amp grounds) it's stupid I know, but zero is hard to come by down here.

Share this post


Link to post
Share on other sites

if your away from how now.. if your alternator is PCU controlled then check your connection to the alternator.. if it has come lose or a wire has got snagged some how the voltage can not be controlled by the PCU there for it will spike..

so check your connection plug too

Share this post


Link to post
Share on other sites

Stupid question, but I got stinger zero and I ran out of zero Ga when installing it so I used some thick 4 Ga, could that be it by any chance? ( 4Ga on the extra batts and amp grounds) it's stupid I know, but zero is hard to come by down here.

no chance.

Share this post


Link to post
Share on other sites

Alright, that might be it because I heard Mech Man is pretty good. I can't see it being bad already. And that's good news too. Thanks a lot man, I'll double check the plug and wires of the plug and if it's all good give him a call.

Share this post


Link to post
Share on other sites

update?

Share this post


Link to post
Share on other sites

I haven't done anything yet. I'm active duty military and my alternator is under my car so I have to lift it up and fight with three huge bolts. Not to mention the garage that has lifts is only open Thursday through Sunday :(. My car is running at those voltages though, dmm tested. I started my car and it idled at 16.5 and my windows wouldn't roll down for some reason, maybe a protect? I'll definitely get it fixed and send the update in case other people have the same problem.

Share this post


Link to post
Share on other sites

no luck with the pigtail being lose? or wires being messed up?

Share this post


Link to post
Share on other sites

Everything checked out fine. I reinstalled the stock alternator and it's holding a more stable voltage. My batteries need a charge since the incident but they aren't dropping below 11.9 or rising above 14.1 anymore. Checked the wires everywhere for lose or cut or unplugged and no luck. Contacted MM, they said box it up and ship it back and they will fix it. Hopefully they can fix it and I can get back to pumping out the higher amps.

Share this post


Link to post
Share on other sites

good stuff.. let us know what was wrong with it

Share this post


Link to post
Share on other sites

As soon as I can. It's crazy though, I thought MechMan wouldn't have this issue. It could be my car, seeing as the computer had been replaced before but I've got a feeling it's the alt.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×