Factory Gen 3 ? or is it a swap ?

Did you upgrade the fuel pump ?

 

that was quick ,yes factory 94 jdm gen3 turbo. fuel pump still stock.
the car was also having bucking/hesitation problems right before the fuse popped.

 

Put another 15 amp fuse in, then turn key to ignition but DO NOT CRANK . Does the fuse pop ?

 

yup turned key to on without cranking and fuse blew

 

Ok so lets see if it is the fuel pump.

Take the bezel around the gear shifter off .

To the side under it there will be the fuel pump plug.

It looks like this



Unplug it.

Now put another 15 amp fuse in. Turn to ignition BUT AGAIN DO NOT CRANK.

Does the fuse blow ? If it does its most likely not the pump.

If it doesnt blow well there is a very good chance its the pump or the pump is nudging the current draw over New pump required

 

thanks for the help, ill give it a go and get back to you.

 

ok so i disconnected the fuel pump and fuel level sensor plug i think? two plugs under the ash tray. turned car to on and it still blew the fuse.

guess that means my pump is ok.

time to start checking relays and fuel pump resistor i guess

 

Yep

But have you modified anything ?

 

nothing that should interfere with the fuel pump or EFI fuse.
ive got st205 w2a and running 16 psi mbc and every thing else is suspension related,the ic water pump is fed through a relay from a different fuse, so its not that.

 

So you just ruled out the fuel pump and wiring up to that connector. There could be a short in one of the harnesses that runs between the connector and the fuse. Probably not, unless you have been doing work around that area of the car.

Next, you should unplug the O2 sensor and try the experiment again. The EFI fuse runs the O2 heater element and if the sensor or the O2 sensor wiring is bad, you will blow the fuse.

 

Great systematic breaking down a problem

 

Also, check for a short on the alternator or wiring, the efi fuse is linked to the charging system

 

thanks for all the help i unplugged the fuel pump resistor and the o2 sensor. replace the fuse with a 10amp as i ran out of 15's and it hasnt blown yet ill work backwards and see if i can find the problem

 

Well done ! Your breaking the problem down

 

ok got the car started with everything except the o2 sensor plugged in.
the connect for the sensor is damaged so ill check to see if theres a short on the plug or if its the sensor itself.
its looking like a good excuse to get a wide band o2 sensor i think.