Have problem w/EFI 5.7 engine. Sometimes when accelterating, engine sputters like fuel is almost shut off. It seems to start best when cold, however it will when hot, at times.I have replaced:ECM/ECU, throttle position switch, spark decoder, high idle valve, spark plugs, S.P. Wires, everything in dist, all sensors on intake, injectors, even has new rebuilt engine. When it runs right, it, s perfect. When it acts up, I think it, s starving for fuel. Also installed both new fuel pumps & blew out gas lines, new fuel filters, cleaned gas tank. Are these years known to have problems w/EFI system? Thanks in advance. Jesse
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Monday, June 28th, 2010 AT 2:06 PM