RB20 in an S13 not getting power to injectors! HELP!!!!!

[gonshik007]

Hello guys just joined this forum not to long ago!

Nice to be on here! I have been trouble shooting my rb20det engine for 3 days now and well so far its coming along but cant get it to run on its own!

The injector clip wires are only getting like .35 volts instead of 12V like its supposed to! any clues? tips? which wiring can I check?

[gonshik007]

If you guys need any more info to help me out just let me know! In the wiring that goes to the injectors I fount a capacitor and the black is ground and white wire gave 12V

[RustspecS13]

Do you have both relays by the ecu? One controls ignition power and the other controls fuel injector power. My harness had a problem some where and it didnt give a signal to the fuel injector relay to turn on.

For a few days i had it jumpered straight on, and after a while i cut the bad trigger off and taped it up and tied the two relays together. So the ecu gave 1 signal to two relays. Worked great, but I havnt found the true cause yet....

~Alex

[gonshik007]

Ok I will have to try that! But I don't have two relays by the ecu at all! the only two relays i found were by the battery!

I also traced the +12 constant volt signal from ecu pin (109) to the black and white on the MAF and on the big gray plug by the battery(by the brown fuel pump plugs)! when I try to find the signal in the harness that leads to the injectors i cant find it!

Could you post pics of what you did? Thank You!

[gonshik007]

any one got any tips? some wiring pictures of how the injectors get there signal? The ECU is putting out 12V constant on pin 109

[90240sxca18]

Just out of curiousity, are you using stock RB20DET OEM injectors, or anything different?

are all of your injectors getting the same power? regardless if its not enough power, are they all getting the same amount

[gonshik007]

Who ever DREW this Thank You!

Ok where does the 12v wire in the engine loom come from? I don't have that voltage on them! Where could it have gotten lost?

[gonshik007]

yes I am running rb20det stock injectors. and I only accessed the first three the once closer to the front of the engine! I get 12V directly at the plug with the ecu on and ignition on! but that 12v gets lost somewhere when it comes to the injectors!

[gonshik007]

anyone got any suggestions?

[mean240]

when my swap was done everything was fine but in the morning was a pain to start... seemed like my fuel pump wasn't primering. then my friends dad fixed it . he installed two relays..

[gonshik007]

Ok Thank God I got it started! God is amazing! It was just a fuse!