Need help Please. Recently installed rebuilt long block 302 in truck, with new injectors. Before last engine lost cylinder due to bad injector I had replaced complete exhaust system. I had to drive truck with blown cylinder towing car about 700 miles. It went through quite a few quarts of oil in the process. Could this have partially blocked the cat conv? I do not have engine light so it shows no codes. I have installed new TPS, new EGR valve, new O2 sensor and new Idle control valve. New plug wires, plugs, distributor cap and rotor. Could it be the ECT sensor? Thanks for any and all help!