Jump to content
SAU Community

Rb20det Doesnt Have Injector Pulse On 1,3,5 What Do I Do?

falky929

By falky929,
in Engines & Forced Induction

 Share

Recommended Posts

falky929 Rising Star

falky929

Posted
Posted

i have a rb20det it doenst have injector pulse on cyclinders 1,3,5. i have changed the ecu over with another ecu that works made no differance at all i have allso test all the injector wires back to the ecu pins and they are fine. what can it be?????? i did notice that the injectors have power running to them all the time even when the cars switched off is that ment to happen?

The Dan Grand Master

The Dan

Posted
Posted
i have a rb20det it doenst have injector pulse on cyclinders 1,3,5. i have changed the ecu over with another ecu that works made no differance at all i have allso test all the injector wires back to the ecu pins and they are fine. what can it be?????? i did notice that the injectors have power running to them all the time even when the cars switched off is that ment to happen?

The injectors should only have power while the ignition is on.

If they have power all the time then either the injectors have burnt out internally or there is a problem with your main loom powers/earths.

Check the main power wires, they run around the base of the strut tower on the turbo side and up to a large rectangle plug beside the power steering res. Make sure nothing is melted/grounded/joined to another wire.

If you have a 12v power connected to the trigger wire, you'll still get continuity back to the ECU but you'll get constant power at that wire which means the injector will not pulse

talky Proficient

talky

Posted
Posted

try tap the injectors with a screwdriver or something mine did this all fixed now .......has the car been sitting for a while?also as mentioned previously make sure you loom is in good working order i had abodgey loom keept pumping fuel hydrulic my motor !!!

falky929 Rising Star

falky929

Posted
  • Author
Posted
The injectors should only have power while the ignition is on.

If they have power all the time then either the injectors have burnt out internally or there is a problem with your main loom powers/earths.

Check the main power wires, they run around the base of the strut tower on the turbo side and up to a large rectangle plug beside the power steering res. Make sure nothing is melted/grounded/joined to another wire.

If you have a 12v power connected to the trigger wire, you'll still get continuity back to the ECU but you'll get constant power at that wire which means the injector will not pulse

yeah ive checked them seems to be fine but must be brocken some where. so what ur saying is if there gettin power all the time it wont be able to pulse there for the injectors wont work. all so its geting power to ALL injectors all the time but only cylinders 1,3,5 dont have a pulse?

falky929 Rising Star

falky929

Posted
  • Author
Posted
yeah ive checked them seems to be fine but must be brocken some where. so what ur saying is if there gettin power all the time it wont be able to pulse there for the injectors wont work. all so its geting power to ALL injectors all the time but only cylinders 1,3,5 dont have a pulse?

allso car starts but only runs on 3cyclinders if that helps

falky929 Rising Star

falky929

Posted
  • Author
Posted
The injectors should only have power while the ignition is on.

If they have power all the time then either the injectors have burnt out internally or there is a problem with your main loom powers/earths.

Check the main power wires, they run around the base of the strut tower on the turbo side and up to a large rectangle plug beside the power steering res. Make sure nothing is melted/grounded/joined to another wire.

If you have a 12v power connected to the trigger wire, you'll still get continuity back to the ECU but you'll get constant power at that wire which means the injector will not pulse

the only way to stop the power goin to the injectors when the car is switched off is when u take the 25amp engine controll fuse out thats in the bonnit or take the ecu out

  • 5 years later...
Scott Black Rising Star

Scott Black

Posted
Posted

Well have you checked if you have 12v with ignition on to one side of each injector? If not then you have a break in the harness on the power side of the injector harness. If you do then you need to trace each pin on the other side of each injector back to the ecu. And if you do and that all checks out then it just leaves a dead injector driver on the ecu board then.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • bilbo117
      R34 GTR Seats / No longer reclining

      By bilbo117 · Posted

      Hi all, Long time since I've posted here. Looking for some advice on what I can remove to further identify the cause of my issues.  I can move the passenger seat forward and back but the knob used to adjust the seat angle is pretty much free spinning, there's very little resistance.  Removing the side cover I can see that the chain is intact but the shaft for the adjustment spins without the gear attached to it moving.  What's my next step for disassembly here? Is this a common fault? Just being a little cautious as I didn't want to start removing bolts for a spring to fly out or something equally as stupid.  Cheers
    • Dose Pipe Sutututu
      Ethanol Content Sensor - Always at 11%?

      By Dose Pipe Sutututu · Posted

      Those above shitboxes, mediocre and above usually have a turbo strapped to them, hence the slightly higher octane is required.  
    • sinn3r
      R34 Skyline climate control unit transistor

      By sinn3r · Posted

      Hi all,   long time listener, first time caller   i was wondering if anyone can help me identify a transistor on the climate control unit board that decided to fry itself   I've circled it in the attached photo   any help would be appreciated
    • Kinkstaah
      Blue slip

      By Kinkstaah · Posted

      I mean, I got two VASS engineers to refuse to cert my own coilovers stating those very laws. Appendix B makes it pretty clear what it considers 'Variable Suspension' to be. In my lived experience they can't certify something that isn't actually in the list as something that requires certification. In the VASS engineering checklist they have to complete (LS3/NCOP11) and sign on there is nothing there. All the references inside NCOP11 state that if it's variable by the driver that height needs to maintain 100mm while the car is in motion. It states the car is lowered lowering blocks and other types of things are acceptable. Dialling out a shock is about as 'user adjustable' as changing any other suspension component lol. I wanted to have it signed off to dissuade HWP and RWC testers to state the suspension is legal to avoid having this discussion with them. The real problem is that Police and RWC/Pink/Blue slip people will say it needs engineering, and the engineers will state it doesn't need engineering. It is hugely irritating when aforementioned people get all "i know the rules mate feck off" when they don't, and the actual engineers are pleasant as all hell and do know the rules. Cars failing RWC for things that aren't listed in the RWC requirements is another thing here entirely!
    • GTSBoy
      Best place to order Authetic R32 Parts in Japan

      By GTSBoy · Posted

      I don't. I mean, mine's not a GTR, but it is a 32 with a lot of GTR stuff on it. But regardless, I typically buy from local suppliers. Getting stuff from Japan is seldom worth the pain. Buying from RHDJapan usually ends up in the final total of your basket being about double what you thought it would be, after all the bullshit fees and such are added on.
×
×
  • Create New...