Looking for some advise guys my friend has a 96 na and the cylinders filled with petrol while the car was parked overnight he mentioned that previously a couple of days before he could hear the fuel pump running with the key out of the ignition . He brought it to a garage and they told him his engine was seized but we knew it wasnt so we brought it home on a trailer and drained the engine completely sump was full of petrol . The engine was not seized we were able to move the pistons by Turning the wheel

just asked the old man he said petrol pump and said its really dangerous petrol disolves the oil and then ur engine will seize up ud want to just disconnect the pump altogether and see whats wrong with it.

I'm not an expert, but I'd say that the relay for the fuel pump is gone.
Probably the contacts burnt causing a closed circuit even without power to the relay coil.
It is also possible that your fuel pump is failing and takes more current to start/work which leads to more amperes, bigger spark at the contacts.

However, I still don't understand why the fuel did't flow back on the fuel return pipe... bad injector seals?

Hope I helped, good luck!

How would u go about checking the fuel pump it's a non turbo thanks

I wouldn't bother the pump just yet.
I'd locate the relay first, plug it out and either pull it apart or check it with a multimeter (continuity).
If the relay is good, I'd also check the relays plug as maybe the relays coil gets power even with IGN off.

If the contacts are burnt together, you may open the relay and separate+clean the contacts. Your pump maybe just fine as no relay last forever. You may need a new one, but cleaning+shaping the contacts with fine grade sand paper could be a temporary solution.

You may also check how much ampere flows on the cable to the pump.
Most of the times its written on the relay housing, how much ampere it can handle.
If you measure more amp than the relay can handle, more likely your pump is going.

Hope it helps

SMIGGY wrote:
Looking for some advise guys my friend has a 96 na and the cylinders filled with petrol while the car was parked overnight he mentioned that previously a couple of days before he could hear the fuel pump running with the key out of the ignition . He brought it to a garage and they told him his engine was seized but we knew it wasnt so we brought it home on a trailer and drained the engine completely sump was full of petrol . The engine was not seized we were able to move the pistons by Turning the wheel
I'd try trick with relay first if it makes things easier. Another option is to pull out fuel injectors to see if they spray fuel in position before you turn key to position where you start engine. If that's the case then you know that relay for them is making shortcut and is overfilling cylinders. That's just reasonably straight forward test.
If pump is on all night and injectors go full time when engine is off then it must be relay....let us know ya man is getting on

thanks for all the replys where is the fuel pump relay its a 96 na

IIRC it is between the fuse box and the resistor packs in the engine bay.
Black in color.

I see it there on my own one mines a turbo but I don't see it in his it's a non turbo

IMOC
might be helpful

SMIGGY wrote:
I see it there on my own one mines a turbo but I don't see it in his it's a non turbo

I have no idea bud.
Checked toyodiy, but could not find it.

Good luck and keep us posted

thanks for all the help

How did you get on with your problem? is it solved?
Keep us posted mate