Engine Will Not Shut Off When Key is in the Off Position

[89gte]

I just started experiencing this today. When key is turned off, everything shuts off (cluster, stereo, temp + pressure gauges) except the engine and MAFT PRO Has anybody experienced this before? I looked up the wiring diagram for the circuit in the TCCS, and I plan on starting by testing the correct ignition wire tomorrow. Just wondering if this has happened to anybody else.

 

[Dan_Gyoba]

Well, mine keeps running, but that's because it's supposed to, so that the remote start "knows" that I didn't leave the car in gear.

You sure that you don't have a turbo timer or remote start installed? (Gotta ask the obvious questions first sometimes.)

 

[89gte]

I have not installed a turbo timer or a remote start, and I have not noticed any additional module that could have been from the previous owner. This this the first time this has happened.

 

[CyFi6]

How do you get it to turn off? Its possible but not likely that it is dieseling.

 

[89gte]

I stalled it out. I forgot to mention that when the key is in the off position, the RPMs at idle drop. In the case of dieseling, I do not think that it is likely either. I have checked to make sure the injectors were not visibly leaking and they do not smell like fuel. The injectors were sent off and flow tested while I was doing my rebuild. The engine will refuse to shut off whether it is hot or cold.

 

[jonahs_supra]

wont run w/o spark
wont spark w/o power from the TCCS
next time is does this try tapping on the ignition switch

try replacing the efi relay

 

[shipkiller]

Ecu shouldn't get power at +B when the key is at off.
check that

 

[satx88supra]

What shipkiller said. The previous owner my have done a fuel pump bypass due to an Open-circuit Relay issue.