Has anyone done or gone through this: a tracker TBI 8 valve swap into my sammy with TBI computer and harness. Install is complete, new ECM and all, when I start it it runs rough and dies after 2 seconds. I know I have to adjust ignition timing because I swapped the distributor, too. But if it fires up it should keep running. Is this a low fuel pressure thing? I've got 2 fuel pumps, the first is low pressure and right near the fuel cell and pull fuel out for the high pressure pump. I'm pretty certain all wires are correct, the ECM and all it's wires and connectors are all stock. everythings hooked to power and ground like it should. only 4 wires not connected, pwr strg switch, A/C wire, check engine light, and VSS. when I did this install 5 years ago I hooked it up exactly the same and it worked. I'm thinking fuel pressure, would low pressure cause it to run for 2 seconds and die? James.