[sr20 will not start a little help please]

the reason you have 12volts on both wires is because you're probing into teh wire with the injector plug plugged in. therefore the 12volt power supply (red wire) is feeding through the injector itself and back up through the signal wire.

 

that's normal.

 

if you unplug the injector, and probe the injector plug, you will find that one wire is powered, the other wire waits for the ecu to send the ground pulse to trigger it to open....

 

Dave

Ahhh i see. Thanks for that

 

Any ideas why it is only running on one cylinder then :s? Seems like it isnt the injectors OR the spark....

 

Could a weak spark cause it to do this? Even that would seem strange though as all the sparks should be the same, and one is working...

[sr20 will not start a little help please]

Sorry for thread dig...

 

I just did an engine swap, i put an s14a engine into my s13. The motor is currently running on 3 cylinders :s I think it is the same problem as the OP as i have spark on all 4 and the fuel pump is going.

 

The other thing i noticed is that i have 12v on both of the injector wires on all 4 injectors. This seems a bit strange that number one cylinder is running fine even though it is giving the same readings as the other three.

 

Anyway, did you find a solution to your problem OP? Or has anyone got any ideas why i would be getting 12v to both wires :s? I have found a few people on other forums (after googlng) with the same problem, but so far i have found no reasons/solutions.