Include

[TenSix]

First of all I want to thank Adam from Leopoles Concepts for all his help with trying to solve my car issue. It is great to live so close and to be friends with one of the most knowledgeable SRT-4 guys on the forum.

Here is whats happing. I have noticed that CD changer and Mopar ipod integration kit was not working correctly so I pulled the radio, changer, and ipod kit and hooked it back up. Now when I try to start my car it starts but shuts off in 2 seconds. Even if I try to give it gas it still shuts off. We tested fuel pressure and the my fuel pump was not putting out much pressure at all and it was not steady stream so we swapped the pump with a new Walbro and the car ran fine for a day as well as my changer and ipod kit. Then the ipod kit and changer stopped working again when I went to start the car again it did the same thing. It tried to turn over a few times then it would not ever turn at all. I unhooked the changer and ipod kit (both changer and kit connect to a multilplexer and that plugs into the back of the radio) and then the car started fine.

I know this is a weird issue and hope someone can help. Here what we have already tried.

-no codes
-installed new fuel pump
-checked all important relays (starter, etc) and all seem fine.
-installed new battery (needed one anyways)
-tried both keys and car did the same thing (rule out SKIM)
-voltage from alternator is 13.4 to 13.6
-we can hear the new pump prime when we turn the key

My question is can a short in the changer/ipod kit cause the car to shut down? Does anyone know the purpose of the "Shut down" relay under the hood? Right now the changer/ipod kit is unplugged and the car has started fine for the last few hours (I have been going out to start it every few hours).

PLEASE HELP!