I installed a 1993 Cobra intake manifold on my stock 1991 Mustang engine. I also installed a 70mm BBK throttle body and new 19# injectors. I kept the stock ECM, idle control valve, EGR valve and 55mm 19# MAF. The engine is very hard to start especially when warm. The throttle must be varied and it finally fires after 5-10 seconds of cranking. It acts a bit like a flooded carbureted engine. Once started it runs smoothly and I have a steady 18 hg of vacuum at idle. Timing is 14° advanced. Is starting being affected by the fact that the MAF is so much smaller than the throttle body?