jaccchris

Hi guys, About a year ago i realised never had any reverse lights, i checked the bulbs they were all fine. I had the computer plugged in no error codes, then a few months later my battery was completely flat, i had my battery replaced. My old battery got tested it there was enough charge in it. Ever since every now and then if i turn the igntion on sometimes the car goes completely dead, I then open my bonnet push the battery and then it comes back on. My heaters only work 20% when on full blast, when the car engine is warm i can feel a slight heat but very little. I have spoken to a friend dad who is mechanic he thinks there could be something up with the ecu. Any suggestions,