Jump to content
SAU Community

1986 Efi Skyline

omally
 Share

Recommended Posts

Factory 5 Mentor

Factory 5

Posted
Posted

1st you need to find out if its electrical, fuel, or mechanical

and does it happen when its cold started? (i.e.in the morning)

i would disconnect the battery, and then un plug the ECU, leave it for 24 hours to reset

The Airflow meter is plugged in correctly i hope!

My guess is the temp sensor is corroded or fouled (it tells the ECU the water temp, thus adjusting the fuel mixture). easy to fix/replace. but it might not be the final verdict.

My old R31 had similr problems, it all started after i played with the screw in the AFM, ran like crap after that, and i never got it right after that.

Datto70 Newbie

Datto70

Posted
Posted

The RB30E engine is very prone to this problem. In most cases it is the AFM (ECU throws a code 12). The 1st thing i usually do is check that the resistence across Pins 1 to 6 on the AFM is 382 +-2 Ohms. If all is good there then squirt some WD40 or similar on the connections and then reinstall the plug & the dust boot - it's amazing how much crap still gets under the dust boot. It may or may not run properly for a day or 2 as the ECU has to relearn the signals from the AFM. If the easy way doesn't work then if you can get access to a Gregory's #242 manual Pg 83 for the detailed method to test the AFM. I can scan the pages & send to you if required.

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

    • joshuaho96
      R34 25GT Engine Light 21

      By joshuaho96 · Posted

      Oil change does not trigger code 21. Code 21 is for coilpacks primary side connection. You can try to clear the code with a battery disconnect, hold down the brake pedal to drain capacitors through the brake lights with the ignition on for 10-15 seconds before you reconnect the battery. I have seen R35 coil conversion permanently cause this code with no ill effects so it might be the resistance it wants to see isn't quite right on one or more coilpacks. Could be inside the ECU, could be the harness, could be a coil. You can test it all if you want or just ignore until the car actually starts misfiring.
    • joshuaho96
      R32 GTS (RB20DE) Injectors Replacement

      By joshuaho96 · Posted

      I forgot you have a Nistune ECU. Use Nistune to do all the tests I mentioned instead of faffing with 30+ year old electrical connectors. You can read MAF volts off that too, there are reference values in the service manual to tell you roughly what it should be in different conditions.
    • GTSBoy
      R32 GTS (RB20DE) Injectors Replacement

      By GTSBoy · Posted

      No. I think it might be the AFM. Hence the use of the terms "swaptronics", which implies the use of swapping out electronics for the purpose of diagnosis. It's about the only way to prove that a small/niggling/whatever problem with an AFM or a CAS or similar is actually caused by that AFM/CAS/whatever. A known good item swapped in that still gives the same problem is likely to be caused somewhere else. They're all the same. Spraying AFMs with cleaner is an each way bet between cleaning it and f**king it.
    • codygrimm27
      Can you mount the ATTESA pump in other locations?

      By codygrimm27 · Posted

      Oh wow! This might actually work amazingly. Do you know the ratio of the diff? I was told the only thing you need to make sure of is if the front & rear diff ratios are the same. Ours is a 4.083 Thanks!
    • GabsReDeal
      R32 GTS (RB20DE) Injectors Replacement

      By GabsReDeal · Posted

      You think its the AFM? I know its a common issues on R32s. I find it coincidental how this issue raised right after cleaning the fuel system. As everything except the fuel system was fine before. I tried running it with the IACV unplugged but did not notice a difference and still stalled. However, the RPM gauge is not in the cluster right now, so I will need to connect the laptop again and use Nistune to check the RPM. I will check this weekend.
×
×
  • Create New...