Jump to content
SAU Community

Rb25 In 32 Running Probs. Ignition Cuts Out After A While

45ULT

By 45ULT,
in Engines & Forced Induction

 Share

Recommended Posts

45ULT Rising Star

45ULT

Posted
Posted (edited)

i put a rb25det in my r32 with the standard r33 25 loom and computer. its been running fine for a while now until yesterday. i washed the car and on the way home the tacho dropped to 0 and car died. i let it sit for a while and it started again. it runs for a period of time and then as if something gets too hot and stops working. i've swapped several things including CAS, ECU, ignitor,

when car won't start it cranks and injectors fire and theres fuel. if u spin the cas the injectors fire but no coils. it did get water in the wiring loom and that has all been cleaned out. i have checked all the wires to and from the cas. it gets battery voltage and earth. both signal wires are outputting signal when it cranks without starting.

any ideas would be great cause im out of em!

Edited by 45ULT
BHDave Grand Master

BHDave

Posted
Posted

when it's dead confirm that you are getting power to the coils. You've swapped ignitors so thats ruled out, check the eccs and ign relays, though it's more than likely the ign one if you still have injectors firing.

the tacho dropping to nothing has me beat as it's based on the ecu output which i assume comes from the cas signal. I've had it happen in an old single coil setup before when the pick up died, but i don't know how it would cross over into a more modern setup.

xionofchaos Contributor

xionofchaos

Posted
Posted
yeah forgot to mention that i've swapped the ignition relay with the other blue one next to it. which i presume is the ECCS one. no difference

I'm not a car guru, but I have had a similiar issue after washing out the engine bay of my R33. I managed to get water into the wiring loom. It caused the coils to short out and start arc'ing. The water causes the spark to arc into the block rather than arcing through the spark plug gap.

I started my R33 while the coils were wet and she started mis-firing something really really bad. I left the car out in the sun with the bonnet up for a few hours and it was improved. She only started mis-firing after 4000 rpm. It took a while but she dried out and was working fine after that. It could be that you have the same issues. Either that or you have water causing a short circuit in your wiring loom.

Hope this helps

Jmaac Proficient

Jmaac

Posted
Posted

Sounds like the ignition module. Everything will test ok, but the car will usually die when it gets hot or it wont start after driving until its cooled. Pretty common in older RB motors apparently

45ULT Rising Star

45ULT

Posted
  • Author
Posted

thanks for all your help guys. i have solved the problem.. it was the coolant temp sensor for the ecu. i pin pointed it by unplugging it when it would not start. the car then fired although extremely rough due to it running rich from the substitute value. i then tried another sensor i had from my spare engine. it has not missed a beat since sunday nite.

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

    • Just_a_datsun
      RB26 block, rb26 head

      By Just_a_datsun · Posted

      Block bump. $400. As above cyl 6 needs bore or sleeve.
    • Kinkstaah
      Blue slip

      By Kinkstaah · Posted

      I would think making the argument that the travel is limited by a spring flexing against a spring perch as "the same method". Later on in the document they do state that the spring can't bind on full bump travel and cannot come loose in full rebound travel as well. (which is all very sensible). The laws are actually pretty sensible and reasonable. It's just that the people who enforce and check them don't actually read them or know them accurately. "Oh, coilovers? Instant fail mate. Don't even need to look at it." - Guy who will be instantly reported by me. There is probably merit to people who do get defected for height also get defected for the suspension in that state that allows it. I did never consider the people who are complaining about coilovers being picked on are also running around at 50mm off the floor.
    • Kinkstaah
      Ethanol Content Sensor - Always at 11%?

      By Kinkstaah · Posted

      I think given SAU's knowledge of E85 we can strongly conclude that 10% ethanol in almost any situation is entirely fine. Almost all of the myths against E85 were overblown, let alone E10.
    • The Bogan
      Blue slip

      By The Bogan · Posted

      From your link See bold text, is this referring to damper settings, if so that may a issue for "some" inspectors, I cannot see aftermarket coilovers having the evidence that "must be available that its functional performance is equivalent to the original" Maybe just remove the adjustment knows and hope for the best???? Meh 5.2 Suspension travel In all instances, modifications to a vehicle’s suspension must ensure the integrity of the system and not compromise the ride quality. At least two thirds of the original suspension travel should be maintained in both directions (rebound (i.e. extension) and bump (i.e. compression)), and rebound must be limited by the same method used by the vehicle manufacturer or if this is not practicable due to the nature of the modification, an equivalent method. If an alternative method is used, evidence must be available that its functional performance is equivalent to the original.
    • Kinkstaah
      Blue slip

      By Kinkstaah · Posted

      They actually don't - They adhere to VSB14 rules just like Victoria. The rules are against CABIN adjustable height, and it quite clearly states that the height has to be within parameters. I asked the VASS engineer to confirm this when I got my car engineered and they refused to engineer the coilovers because they didn't meet the requirements for requiring engineering. (mine are height adjustable.) People "Not wanting to bother" with "Actually reading/knowing/adhering to the rules" should result in fines and immediately losing the ability to issue blue slips and/or RWC's in Vic.
×
×
  • Create New...