car starts and runs well until warm,sputters awhile then dies,will not restart until it cools off. A month ago car ran poorly always, found converter clogged,removed and it ran good for a few weeks. Fuel pressure good,replaced CTS and O2, no fault codes,I think ECM is bad,will one from 3.1 lumina work? I have already bypassed VATS with resistors, pick ups in ignition were bad.