20v ST shuts off after one min

[87inaustin]

hello i recently did a 20 valve silvertop swap in my AE86 and it shuts off after one minuet wondering if any one knows why????

possibly i do not have a o2 sensor plug in // due to running only headers at the moment, just trying to fire it and leave it running before i take of lift and put tires back on

i also don't have my efi silencer plug in , due to not knowing were to plug it in on my engine

some one has had this problem i am sure lol

[dr.occa]

Check all your grounds.
Check that your fuel pump is staying on.
Check that your fuel injectors are pulsing out fuel properly.

[mooreofit]

it might be tring to referance the o2 after warmup. id get that hooked back up.