Jump to content
SAU Community

R33 persistent issues. P/steering and lag/misfire

MissMintyR33
 Share

Recommended Posts

MissMintyR33 Apprentice

MissMintyR33

Posted
Posted

Looking to sort out a couple of issues on my skyline 

It recently was rebuilt, however rebuilder long story short did not give two flying effs about the work he did. So moving forward it's running but I have two persistent issues

1) it has a misfire / lag type of issue (was at higher RPMs but I had a dead piggy back ecu removed which improved it) now it's not as bad but still does it at random, I thought it may have been a boost issue I'm running an older turbosmart dual stage controller, turbosmart told me to try running off gate pressure however it still has a lag at random times. It has New MAF, maf plug, coil packs, sparks, CP harness.. injectors tested and cleaned. Factory ECU.

2) Power steering issue. It is tight as anything. Flushed power steering, rebuilt my pump because the bearing was shot. Flushed again still tight (mainly when parking and going slow into my driveway etc) 

No kinks in hard lines, replaced the lines I could see had cracks. Still tough to steer. 

I was told to shim a coin and place into the solenoid plug? Is there anything else. My steering angle sensor also has a issue. It's a used one I replaced, does it need to be calibrated? I feel like I've tried everything and this car is my voodoo doll. 

 

GTSBoy Grand Master

GTSBoy

Posted
Posted

Power steering is probably because someone has nuked the HICAS CU and you no longer have the variable power asist doing what it is supposed to.

How much boost are you running? You are aware that any more than 10 psi on the stock ECU is just asking for it to go to full R&R (that's Rich & Retard, which is effectively Retarded and Retarded!) which kills all the power. Depending on the exact conditions, it can just be runnign on the fat and stupid end of the maps, then the conditions change, you make a little more boost and the ECU goes into panic.

Murray_Calavera Mentor

Murray_Calavera

Posted
Posted
1 hour ago, MissMintyR33 said:

I was told to shim a coin and place into the solenoid plug?

Yeah this is a thing. I've had mine setup like this for a few years now, works fine. If I dredge my memory bank, I think I had to do this after I removed my factory dash. 

1 hour ago, MissMintyR33 said:

turbosmart told me to try running off gate pressure however it still has a lag at random times

So you've tried it on gate pressure, I'm assuming this is the factory turbo? Did you still have misfire issues with that setup?

MissMintyR33 Apprentice

MissMintyR33

Posted
  • Author
Posted
1 hour ago, GTSBoy said:

Power steering is probably because someone has nuked the HICAS CU and you no longer have the variable power asist doing what it is supposed to.

How much boost are you running? You are aware that any more than 10 psi on the stock ECU is just asking for it to go to full R&R (that's Rich & Retard, which is effectively Retarded and Retarded!) which kills all the power. Depending on the exact conditions, it can just be runnign on the fat and stupid end of the maps, then the conditions change, you make a little more boost and the ECU goes into panic.

I had someone check the CU, they said it was fine but it could be buggered 

I was only running around 7-10 PSI on the dual stage controller, but my boost gauge is shit house and needs replacing so I'm not getting a true reading.  Then I ran from wastegate pressure as per Turbosmart but still have the same sort of issue 

MissMintyR33 Apprentice

MissMintyR33

Posted
  • Author
Posted
8 minutes ago, Murray_Calavera said:

Yeah this is a thing. I've had mine setup like this for a few years now, works fine. If I dredge my memory bank, I think I had to do this after I removed my factory dash. 

So you've tried it on gate pressure, I'm assuming this is the factory turbo? Did you still have misfire issues with that setup?

Thanks, I'll shim that plug and hopefully it fixes it. 

Yes still factory turbo for now, still have the misfire it's not as bad but still noticeable 

Murray_Calavera Mentor

Murray_Calavera

Posted
Posted
2 hours ago, MissMintyR33 said:

It has New MAF, maf plug, coil packs

What MAF are you running? Where did you get it from? (What I'm getting at is, are you 100% certain it is a Nissan MAF and not a china copy?)

What coils are you running?

MissMintyR33 Apprentice

MissMintyR33

Posted
  • Author
Posted
Just now, Murray_Calavera said:

What MAF are you running? Where did you get it from? (What I'm getting at is, are you 100% certain it is a Nissan MAF and not a china copy?)

What coils are you running?

It's a direct aftermarket from NSW, my factory Nissan one shit the bed. Are aftermarket no good for them? 

Was splitfires removed to see if they were causing a seperate issue and had some savage performance from NZ  ones I put in

MissMintyR33 Apprentice

MissMintyR33

Posted
  • Author
Posted
4 minutes ago, MBS206 said:

What are the plugs gapped to?

Will it rev up top fine at light throttle?

1.1 Denso Iridium 

It's random really, I can go to a high rpm okay one time and then it'll lag/hesitate .. it's hard to explain what it does. It's not a backfire, I think I'm gonna have to try and video it when I fix my steering issue. sometimes it'll do it taking off from lights at a lower RPM 

MBS206 Grand Master

MBS206

Posted
Posted
10 minutes ago, MissMintyR33 said:

1.1 Denso Iridium 

It's random really, I can go to a high rpm okay one time and then it'll lag/hesitate .. it's hard to explain what it does. It's not a backfire, I think I'm gonna have to try and video it when I fix my steering issue. sometimes it'll do it taking off from lights at a lower RPM 

Gap your plugs down to 0.8mm

What coil packs are in it? I assume they weren't replaced when the engine was rebuilt.

MissMintyR33 Apprentice

MissMintyR33

Posted
  • Author
Posted
Just now, MBS206 said:

Gap your plugs down to 0.8mm

What coil packs are in it? I assume they weren't replaced when the engine was rebuilt.

I had splitfires before the rebuild, however I was looking at an issue spark related and put another lot in (savage performance) but it ended up being my piggy back ecu + the coil module, so I still have the splitfires laying around

Murray_Calavera Mentor

Murray_Calavera

Posted
Posted
12 minutes ago, MissMintyR33 said:

Are aftermarket no good for them? 

Lots of bad aftermarket MAF's exist unfortunately. 

13 minutes ago, MissMintyR33 said:

Was splitfires removed to see if they were causing a seperate issue and had some savage performance from NZ  ones I put in

Lots of bad aftermarket coil packs exist as well. I'm not familiar with savage performance coil packs but I wouldn't bet on them being amazing. 

MissMintyR33 Apprentice

MissMintyR33

Posted
  • Author
Posted
3 minutes ago, Murray_Calavera said:

Lots of bad aftermarket MAF's exist unfortunately. 

Lots of bad aftermarket coil packs exist as well. I'm not familiar with savage performance coil packs but I wouldn't bet on them being amazing. 

Any idea where I can get genuine MAF apart from used ones? I can't find any only for GTRs and unfortunately that price is not in my budget 🤣 I might gap my plugs down and put my splitfires in, they were only in for a year or so before I started the rebuild 

Murray_Calavera Mentor

Murray_Calavera

Posted
Posted
22 minutes ago, MissMintyR33 said:

Any idea where I can get genuine MAF apart from used ones? I can't find any only for GTRs and unfortunately that price is not in my budget 🤣 I might gap my plugs down and put my splitfires in, they were only in for a year or so before I started the rebuild 

There is a really fun solution to this problem, buy a Haltech (or ECU of your choice) and put the MAF in the bin. 

I'm assuming your going to want more power in future, so you'll need to get the ECU at some stage. I'd put the new MAF money towards the new ECU. 

MissMintyR33 Apprentice

MissMintyR33

Posted
  • Author
Posted
1 hour ago, Murray_Calavera said:

There is a really fun solution to this problem, buy a Haltech (or ECU of your choice) and put the MAF in the bin. 

I'm assuming your going to want more power in future, so you'll need to get the ECU at some stage. I'd put the new MAF money towards the new ECU. 

I thought that might be the case, thats what I'll start saving for. Thanks for the info 

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

    • GTSBoy
      $5 Clock upgrade for R32 GTR

      By GTSBoy · Posted

      The attached document is fine. I just downloaded & opened it.
    • ToothDR32
      $5 Clock upgrade for R32 GTR

      By ToothDR32 · Posted

      Hello, sorry for being late to join the discussion, but my clock just died on me.   Ive tried to look at Michaels digital clock repair.docx and it doesnt work maybe the file has expired.   Please let me know if you can re upload it or take some youtube videos to show us how to get the clock installed? thanks
    • MissMintyR33
      R33 persistent issues. P/steering and lag/misfire

      By MissMintyR33 · Posted

      I thought that might be the case, thats what I'll start saving for. Thanks for the info 
    • jtha7
      Strange issue RB25DET wont start

      By jtha7 · Posted

      Ps i found the below forum and it seems to be the same scenario Im dealing with. Going to check my ECU coolant temp wire tomorrow    From NICOclub forum: s1 RB25det flooding at start up Thu Apr 11, 2013 7:23 am I am completely lost on this. Car ran perfectly fine when I parked it at the end of the year. I took the engine out and painted the engine bay, and put a fuel cell with an inline walbro 255 instead of the in tank unit I had last year. After reinstalling everything, the engine floods when the fuel pump primes. if i pull the fuel pump fuse it'll start, and as soon as I put the fuse back in it starts running ridiculously rich. I checked the tps voltage, and its fine. Cleaned the maf as it had some dust from sitting on a shelf all winter, fuel pressure is correct while running, but wont fire until there is less than 5psi in the lines. The fuel lines are run correctly. I have found a few threads with the same problem but no actual explanation of what fixed it, the threads just ended. Any help would be appreciated. Rb25det s1 walbro255 fuel pump nismo fpr holset hx35 turbo fmic 3" exhaust freddy intake manifold q45tb q45 maf   Re: s1 RB25det flooding at start up Fri Apr 12, 2013 5:07 am No, I didn't. I found the problem though. There was a break in one of the ecu coolant temp sensor wires. Once it was repaired it fired right up with no problems. I would have never thought a non working coolant temp sensor would have caused such an issue.
    • jtha7
      Strange issue RB25DET wont start

      By jtha7 · Posted

      Hi sorry late reply I didnt get a chance to take any pics (my mechanics on the other side of the city) but the plugs were fouled from being too rich. I noticed the MAF wasn't genuine, so I replaced it with a genuine green label unit. I also swapped in a different ignitor, but the issue remains. I've narrowed it down a bit now: - If I unplug and reconnect the fuel lines and install fresh spark plugs, the car starts right up and runs perfectly. Took it around the block with no issues - As soon as I shut it off and try to restart, it won't start again - Fuel pressure while cranking is steady around 40 psi, injectors have good spray, return line is clear, and the FPR vacuum is working. It just seems like it's getting flooded after the first start I unplugged coolant sensors to see if its related to ECU flooding but that didnt make a difference. Im thinking its related to this because this issue only started happening after fixing coolant leaks and replacing the bottom part of the stock manifolds coolant pipe. My mechanic took off the inlet to get to get to do these repairs. My mechanics actually just an old mate who's retired now so ill be taking it to a different mechanic who i know has exp with RBs to see if they find anything. If you have any ideas please send em lll give it a try. Ive tried other things like swapping the injectors, fuel rail, different fuel pressure regs, different ignitor, spark plugs, comp test and MAF but the same issue persists.
×
×
  • Create New...