Ve ss fuel pump not re-priming

[Alex.a]

Hi guys,
Have a bit of a problem and hoping for some assistance.
I have a 07 ve ss ute. I recently bought it and has been having the following issue.
On initial turn of the key, the fuel pump can be heard priming, clicks off and car will start and runs fine. However if I turn it off, then back on the pump wont reprime and the car won't run properly. It does fire up and runs like crap, shakes and throttle modulations do nothing (can hear the motor gulping air but seems like no fuel or not enough).

But, if I remove the key, lock and unlock l, the pump will prime and car will fire up fine... Without Any issues!
Is this Bcm related? Some security feature playing up? What tells the pumps to reprime and or turn back on after they have initially primed?
Checked all fuses and relays.. The key is getting hard to turn in the barrel and requires some jiggling.
The car has a 416cube stroker but was playing up before I built it...
Any assistance would be greatly appreciated. Thanks all!

 

[RIC369]

Hi Alex.a
It could be the ECM reset problem. You can try do not unplug the key, disconnect the battery for 1 or 2 minutes, this will reset ECM (will lost all settings, radio stations, lights settings,...est)

 

[Alex.a]

Thanks for the reply, so your saying leave the key in the ignition and disconnect the battery for a few minutes?

 

[07GTS]

they wont prime with every key on, its a time delay between primes

 

[Trevor loves holden.]

I didn't think they prime just pump, have you tried pulling up the fault codes.

 

[Immortality]

Have you tested fuel pressure at the rail?

 

[RIC369]

Thanks for the reply, so your saying leave the key in the ignition and disconnect the battery for a few minutes?

(But, if I remove the key, lock and unlock l, the pump will prime and car will fire up fine... Without Any issues!)
See, remove the key, it only totally disconnect the electrical circuits. Does not effect anything else. same as reset.
of course, This is only logically thinking. I believed its not harmful.
My story: worm start, crank too long. I disconnect the thermo sensor. measure and reconnect again. then display keeping tell me not connected, and two fan on together. spend a long time, I try disconnect battery, few minutes connect again. get to normal, of course, worm start problem still there.

 

[Trevor loves holden.]

Have you had your fuel rail pressure test yet? Have you scanned for faults? Could be a bad coil, bad plug.

 

[RIC369]

Have you had your fuel rail pressure test yet? Have you scanned for faults? Could be a bad coil, bad plug.

Thank you for you advice, I will order the pressure gauge. but very hard connect the fuel gauge.

 

[RIC369]

Thank you for you advice, I will order the pressure gauge. but very hard connect the fuel gauge.

I checked spark plugs, and coils all good.