pacotaco345
03-10-2014, 09:57 PM
Soo where to start?... In January I got my sr running again with poncams and s14 bbt28, kinda tuned on SAFC neo but was maxing out the stock injectors at just 7 psi. Left for school a couple weeks later and left the car here. Between then and now (my spring break) I had the ecu sent off to enthalpy, got an hks actuator and some sard/denso 550cc injectors. This is where the problems start.
When I first installed the injectors the oem plugs didn't work, though I was told they would. Instead the prongs were bent to shit from having oem plugs shoved onto them by the PO of the injectors. Second, as soon as I primed the pump fuel shot out of the rail around the #2 injector like a motherfucker. So i pulled the injectors again, replaced the o-rings and that fixed that. Next I picked up some denso connectors and wired them in (used solder and heat shrink).
I finally plugged everything in and went to fire it up. Running on cylinders 2 & 3, with spark in all 4. Got injector 1 to fire and went to work on #4. This is where I'm stuck at now. I've checked resistance across the injector, ~15 ohms, the same as the other four. I've checked power to the injectors (my wiring) and watched it fluctuate up and down between 3 & 12v as the car was running. Fixed the little prongs on ALL the injectors so that they finally plug in as should. I've put my ear next to the injectors and I *THINK* that I hear the fourth injector clicking, but I'm not sure that its not me overhearing the other 3. With the fuel pump fuse pulled, the car sits there and barely fires as the remaining in the rail trinkles down into the injectors. I unplugged all the coilpacks with the exception of cyl 4 and removed the pump fuse again; the car occasionally pops as the injector lets fuel drop into the cylinder. Plug everything back in and same old song and dance. Car runs on cylinders 1, 2 and 3. Unplugging the 4th makes no difference whatsoever.
Sooo what do you guys think? Maybe injector 4 is kinda stuck open to where without fuel pressure it functions as it should, and with 43 psi its just too much?.. Or maybe its stuck shut.. Or maybe I'm just an idiot and there's something I'm missing. Either way if anyone has an idea please give me your input. I'm getting tired of throwing money at this thing and would prefer not to drop another $300 on injectors. :/
When I first installed the injectors the oem plugs didn't work, though I was told they would. Instead the prongs were bent to shit from having oem plugs shoved onto them by the PO of the injectors. Second, as soon as I primed the pump fuel shot out of the rail around the #2 injector like a motherfucker. So i pulled the injectors again, replaced the o-rings and that fixed that. Next I picked up some denso connectors and wired them in (used solder and heat shrink).
I finally plugged everything in and went to fire it up. Running on cylinders 2 & 3, with spark in all 4. Got injector 1 to fire and went to work on #4. This is where I'm stuck at now. I've checked resistance across the injector, ~15 ohms, the same as the other four. I've checked power to the injectors (my wiring) and watched it fluctuate up and down between 3 & 12v as the car was running. Fixed the little prongs on ALL the injectors so that they finally plug in as should. I've put my ear next to the injectors and I *THINK* that I hear the fourth injector clicking, but I'm not sure that its not me overhearing the other 3. With the fuel pump fuse pulled, the car sits there and barely fires as the remaining in the rail trinkles down into the injectors. I unplugged all the coilpacks with the exception of cyl 4 and removed the pump fuse again; the car occasionally pops as the injector lets fuel drop into the cylinder. Plug everything back in and same old song and dance. Car runs on cylinders 1, 2 and 3. Unplugging the 4th makes no difference whatsoever.
Sooo what do you guys think? Maybe injector 4 is kinda stuck open to where without fuel pressure it functions as it should, and with 43 psi its just too much?.. Or maybe its stuck shut.. Or maybe I'm just an idiot and there's something I'm missing. Either way if anyone has an idea please give me your input. I'm getting tired of throwing money at this thing and would prefer not to drop another $300 on injectors. :/