Thank you. I did change the ecm with a 280 000 556 from a 1989 nt 740 and the engine wire harness. It runs a little better but only runs for a few mins then starts to sputter and dies. Rpm's seem a little low, but even so its hard to start and when started it will run for a few mins and sputter and quit then its starts with a little cranking more than it should be it will start run and do the same sputter and stop. unless I keep my foot on the gas about 2000 rpms, I have checked the fuel pressure its about 40psi and rests at about 50psi still hard to start. I changed the rsr and no difference, I changed the pick up sensor on the trans and no difference. As it quits the rpm's slow down along with the motor. I changed the fpr with several copper terminals and the aluminum type no difference. I changed the main fuel pump same thing and the in tank pump same thing. I even went as far as changing the icu and its wires no difference. No fuses get hot and I changed the amm nothing.I changed the knox sensor, and coolant sensor same thing, what next?? Frustered I need to sell this car but can't like it is. Help--you can call or email me its faster at 818-708-7052 and I can call you back or mail me at ufarley@earthlink.net Thank you Chuck