1999mustang2000

i recently did some new mods...shocks/struts/zex plugs and 2 amps...ok so now when i turn my a/c on my battery meter goes completely flat and turns the radio off everything next problem if im doin a burnout my car will hit 2500 then SLOWLY CREEP up in rpms and doesnt go WOT any ideas guys? ive never seen anything like this

1999mustang2000

and my oil temp/pressure and a/f ratio gauge quit working

1999mustang2000

noone?

devongarver

you got some serious wiring issues.... disconnect both amps and see what happens...

1999mustang2000

could it be something to do with the grounding of the battery because i hae a relocation kit

GT Tommy

You will need a multimeter voltage tester for this. Start your engine. With nothing on, check to see what the voltage is at start up on your battery. It should be over 12.5 volts. Now, turn on your sterio, both amps, and what ever else you installed electrically. It should now be over 13.5 volts or higher. Use a multimeter and check to see how much drain you have on your battery. Seems to me, you will have a large drain on your battery due to all the electrical stuff you are running. We experienced the same thing with my son's 2003 GT Mustang. That's why we installed a 160 amp alternator shown below. I believe there is constant voltage to your amps at all times from your power cable. Try running your engine without any of the electrical items plugged in, meaning disconnect the battery power to the amps from the battery terminal. It is also possible that the insulation from your power cables to your amps may have gotten damaged during installation (open some where) and is grounding out your system. See if there is a difference after you disconnect your amps power cables from your battery terminal. If there is a difference, that would mean somewhere between the battery terminal and the amps, the insulation is damaged and the wire is touching the car bodies metal. Remember, your ignition system, as well as your fuel pump, needs a certain amount of voltage to operate normally. If you starve these systems, your engine won't run right. Good luck, Tommy.