87suprat

Hello all, so I have a friends 99 Es300 over and was just replacing a few mechanical things, struts, cv shafts, steering rack, end links. Got all this done and now the vehicle has a p1300 code. The only other thing I did was disconnect the battery for when I did the belts. The 300 will not stay running at all. It starts, (sometimes) then dies within ten seconds and sounds like its misfiring. all the coils are working properly. I saw this code point to No.1 coil, its not the coil pack or spark plugs. I tested the ecm as well and everything looks good there as well. I have no other codes but is it possible thats cause it will not stay running? My next option was to look into the crank and cam sensors to see if those could be causing this? Any help or insight would be greatly appreciated. Im stumped, and want it out of my garage honestly. And I checked all the vacuum lines.