It doesn't sound like a turbo problem, it sounds like a wiring problem. What gauge wire did you run?

 

I am running an Odyssey 925 in the trunk (4 gauge wire). I originally grounded the battery in the trunk, but ended up with some electrical issues. I had to run another 4 gauge wire from the trunk to ground the battery at the factory location (this solved my electrical issues).

Scott-

 

I know it's not turbo, just wondering
If the new ems was pulling or relocate was causing issues. Anywho, I did also ground it in the trunk, maybe that could be an issue as said above

 

And I ran some big ass wire. I wanna say 2

 

When I did my relocation I used the factory ground strap. (just unbolted it from the fire wall and bolted it down in the trunk) I knew that one ground wouldn't be enough so a ran another 4 gauge wire to another body ground. Maybe this is your problem as stated above. I am also running an odyssey battery, with no issues.(the tiny one) Make sure you get a circuit breaker for the system, they are cheap and readily available. I got my 100 AMP breaker at AutoZone for $30 and it also acts as a good kill switch/ battery disconnect. I hope this helps!

 

Some pictures of my setup:

 

Check your ground. You need a wire the same size or larger than your power wire, as short as possible, bolted to the body of the car. Use a grinder or sandpaper or dremel or whatever you can get your hands on, and grind the paint/coating away. You want the ground wire to be touching bare metal. Even if it doesn't look painted, grind it anyway; there's an anti-corrosion coating. After you bolt the ground down, you can hit the area with some spray paint to prevent rust. You should do this regardless of whether or not the battery/wiring is the problem here, because it'll keep your alternator and battery in better shape than if you have a crappy ground. Don't run a ground all the way back to the engine compartment. While it might "work", it's not the right way of doing things.

Like someone else mentioned, try unhooking the battery and go for a test drive. Once the car is started, the alternator should be able to run everything. Once the car is running, the battery is only used lessen the strain on the alternator when something suddenly draws power. A bad battery can actually be a load on the alternator and cause problems.

Also, it'd be a good idea to get the battery tested and also see what voltage the alternator is putting out at idle and cruising RPM.

 

Thanks guys. Will do