so I have a 86 GN factory ECM car sits in the garage most of the time hardly ever driven started and pulled the car out and was letting it run to warm up etc... while I cleaned the garage. long story short it ended up dying no fuel pressure found one of the pins on the original ECM broken off from corrosion. I ended up ordering one online it arrived with no chips installed so I had to install my chip and a smaller chip off to the side. installed into car and it started runs terrible won't idle. 2 things I have noticed I have a check engine light all the time and I also have a scan master gen 2 the round style and all the values on it are zero. when I turn the key on it says linking and it synchs up with the car but when I start the car all values are zero???? so im at a loss im thinking a bad connection or something with the factory plugs that connect to the ECM but I wasn't sure. I made sure the chips are in all the way and I also made sure the broken off pin is removed from the harness so those have been done? is there a relearn or something I need to do or a programing process I need to do with this new ECM. I got it thru auto zone its a cardone A1 brand.