no power to injectors

[sharky559]

ok i have spark but no fuel. ever since i put a 1g cas on my 95 gst. i have fuel presure. could it be the cas sensor or is there other sensors that give power to the injectors. help

 

[BLINKY619]

check the power transistor

 

[sharky559]

power transister i havent check that. the only things that ive checked is the resister. what does the power transister power i thought it powers the spark coil.

 

[steve]

Power to the injectors come from the injector resistor pack. The ECU side grounds the other side of the injector when it wants to open them.

If you miswired the 1G CAS you could have damaged the ECU or it could be bad and not signaling the ECU which would keep it from firing the injectors.

 

[sharky559]

is there a way to test the 1g cas

 

[steve]

Sure there is. I've even posted a couple a few times.

 

[1quicklaser]

To test the CAS just take it out of the cylinder head but leave it plugged up. Then turn the cas by hand and see if you can hear the injectors clicking. You should be able to hear the fuel pump kick on and the injectors/spark plugs firing

 

[rex_offroad]

isnt the resistor pack before the CAS in the wiring? so if the resistor pack is bad wouldnt that affect the CAS test? or since you have the cas out and hand cranking it does it just kind of bypass the resistor pack? im curious i need knowledge for another attempt to get my ride running tomorrow

 

[sharky559]

ok bros so i tested and when i turn the cas by hand. and the only thing i hear is the pump sending gas but i dont hear the injectors.