I have a 98 tahoe 4x4 4door i have a new engine with all new sensors. I have no spark or fuel. I replace the fuel pump not to long ago and tryed a new ecu. Does any one have a clue. I also check the cam shaft to see if it snap in 2. Every thing with the engien seems to be good dont think i'm getting power to the ecu and all fuess seem ok. Thanks for the help