Need urgent help with 7m mk3

[MkiiiAllDay]

In need of urgent help, I was working on my dad's supra 90 na, and installing a security system and car doesn't get cel when turned to on position, friend of mine diagnosed possibly bad ecu or bad grounds. ( I took all security wires out to find the source of problems but to no avail) please anyone help

Car cranks but that's all

 

[CyFi6]

Was it working prior to you messing with it? Check fuses and there a set of ground wires on the intake manifold side of the engine that need to be bolted to the intake manifold runners.

 

[MkiiiAllDay]

Yes it was working prior, I haven't messed with anything on the intake side other than vacuum lines

 

[suprasteveo]

Im sure it'll be a simple ground connection or something was disconnected. Things wiggle loose when fiddling with vacuum lines....