Fuel pump runs while car off

[transparentdsm]

so i got 1365 back together and running correctly(brother-in-law finally got money together and will soon be taking it home) and for some reason when i turn off the car the pump continues to run for around 30 or so seconds then shuts off. does anyone have any idea what this could be? i was thinking the MPI relay may be going but not 100% sure. has anyone experienced anything like this and found the fix? i did some searching and came up with nothing if you know of any search spots i may have missed please let me know. i looked under every key combination i could think of to get it. would love some help before i start to tear into it so im not hunting for it.

 

[dammitjim]

I'd start by pulling fuses and relays until the pump turns off.

 

[toybreaker]

Is the pump re-wired?

 

[FlyingEagle]

Turbo timer still somewhere in car?

 

[iceman69510]

Interesting. To go along with Toybreaker's line of thought...there is a relay that keeps the window switches and sunroof hot for 30 seconds after ignition shutoff. Some cross wiring perhaps?

 

[holeshotmoe]

Continuing with Toybreaker and Iceman: Turn it off then immediately open the door. This should zero the 30 second timer. See if the pump shuts off.

 

[transparentdsm]

thank you all, yeah the pump is re-wired and there is no turbo timer in it. it has a stage 3 keydiver chip ets front mount 560 evo's and evo mas, other then that pushing 13 lbs of boost and everything else is stock. i will try the door thing. i think i had the door open when i turned the car off.. the rewire could have been done wrong. i didnt do it, i bought the car with everything it has already on it.

on another note, i did also just swap out the ecu for a different one because it was bad.
could the ecu have anything to do with it?

 

[iceman69510]

Could be if someone has put in jumpers or something (repaired ECU), because it is the ECU that holds the ground for the MPI relay thus running the fuel pump. I would be looking at that rewire though.

 

[transparentdsm]

i don't know what happened but just went out to the car and it didn't do it today. it was idle hunting for a second then smoothed out.