memphis amp problem

Hello, I am new here, been searching the web for a solution to my long-frustrated problem.

Alright to start I have: Kenwood Deck ( KDC-MP735U ) Memphis Amp ( MClass 1100W x 1, Class D Mono Block Amplifier, 16-MCD1000 ) Dual 1000Series DD Subs Dual R-Type Tweeter/Speakers I have 4 gauge wire running from battery to amp, and 4 gauge wire running as ground wire. I have 10 or 12 gauge from the amp to both subs. And speaker wire for remote wire and for the speakers. My problem is that when I turn the car on(Engine is running), The protect light comes on and only my speakers work. After I drive around for bit, and the car warms up if i push the brake, or the clutch in, the amps protect light turns off and power light on thus the subs kick in for about a minute or till I hit the gas pedal and it turns to protect again. But the trickery part is that when I just turn the car are into acc. mode. The amp turns on and the subs run perfectly. But once I turn the car on with the engine running it goes back to protect mode. I have re-wired everything! I think I re-wired the deck atleast 3-4 times(All speakers wires, power, remote to amp, rca's, Ipod adapter...) And the amp about 5 times(Ground, power wire, rca's, sub wiring) And I still do not have a solution. If anyone has a solution to this I would be greatful!Also this is being ran in a 1982 AMC Spirit, it has a 66 amp Altenator(i think) and has worked up until a week or so after I got my new deck.

This problem has been going on since before december, just asking for a last hope to have it fixed.

You need to check the voltage on the remote and power wire of the amp.  Check it with the engine off and then with the engine revved up a little and the amp not playing.  Post all 4 voltages here.

Volume while the car is in acc and on being at the same level? Is the amp heating up at all? The first thing I am thinking towards is possible sub wiring.

Ahh, idiot has a good point. Was really odd, we wired up my brothers 2 amps in his 05 altima and with both of them setup the amps would go into protect. When we removed a power or ground from one the other would turn on perfectly. The problem ended up being the remote wire and its juice. He ended up tieing the amp remote into the cars accesory and everything worked perfectly. Good luck and report back! ~Steve

Yes take all readings AT the amp.

They tell me that your voltage regulator or your alternator is bad.  The pulse width modulator chip in the power supply of the amp does not like to see anything over 15.0 volts on the remote wire.          If the car has an outboard voltage regulator, check for a loose ground connection.  If it is in the alternator, have it checked.