Good Morning everyone. I'm new to the forum so please bear with me. Recently I purchased a 1990 GT 5.0 as my project car and aside from general maintenance there is nothing special about it. The individual(s) before me did install a cold air intake, 65mm throttle body, exhaust from the header back, and an E303. The issue I am having is that the car seems to idle very low at about 550 to 650 rpms. As a bit of background, recently I took the car to a shop and was determined that there was no vacuum leak, compression was good, and after finding out that the timing was retard a bit it was adjusted to 14 degrees. This in fact made the idle more stable as it was worse before; however, its not where it should be and the car does turn itself off after a few minutes of sitting at idle. Now I have heard that because the intake and heads are stock, that the e cam is the cause of the problem and the ecu either needs to be chipped or flashed or go to standalone in order to correct the issue. Can anyone validate this or perhaps give me some other ideas of where to continue. Thank You very much. happy new years to all.