Hi,

Today while tuning we had an interesting issue whereby the motor just cut out during a pull. The dizzy is still sparking, and fuel is reaching the rail but the injectors now arent pulsing. It is looking like a wiring problem to the injectors. The oem wiring has seem better days so it may be time for me to run some fresh wires with new injector plugs to eliminate any further problems.

My question is how to ground the injectors, should they each have their own ground? do they ground back to the ECU? or can they be grounded to the chassis? I have an obd2a pinout detailing the injector pins so running those is fine, but just need to know how to handle the grounds.

Can anyone help?

 

ahh so i think i understand the way this works now. My question is where i can take the 12v power source from, are there any special places that it would be best to take it from?

 

use the same wiring that your harness uses, if there is a break somewhere you need to find it, start testing for voltage at he clips and trace it back

 

but i want to bypass the old wiring, in the off season i will have a completely new loom made, but for the time being i want to eliminate the old wiring.

 

If you want to bypass your old wiring. You might as well take it from the switched side of the main relay.

 

Injectors pulses by grounding the signal (the ECU does this). Injectors must be fed using 12v.

try using a led and a resistor to check it.