Jump to content
SAU Community

Recommended Posts

Sounds like a vacum leak. Check all your signalling hoses/vacum lines for splits and cracks. Also brake booster and variable length intake actuator diaphram for breakage/busted seal.

Edited by iseekool

Yeah I've tried a different afm also a different tps sensor hoping that that would solve the issue but no luck. I would have gone the cheaper plugs but yeah as Neil said just getting to the plugs is a bitch the whole intake pretty much has to be unhooked and taken out. Which isn't a fun job at all. Hopefully this afternoon when I get the car back they will have found out the issue.

So turns out the plugs were causing timing issues with both my tps sensor and my ignition timing which was throwing out my timing in general, causing flat spots. But in all that with a dyno run a tune and new plugs cost me a bit but it the car runs completely different to what it did before hand. Gained and extra 60kw atw from the run they did this morning. Pretty happy with these guys but it still feels like its missing while cruising which is driving me insane... Going to give what iseekool said ago on the weekend to see if that makes it runs 100% :)

60kw gain? It must've been running like an absolute slug before it went in, since that's about half the stock power output. My guess is today they dodged the dyno results somehow. But as long as it drives better then that's a bonus.

Yeah well it was running like crap mums gt 86 was beating me in a straight line which was just embarrassing to be honest.

A GT86 is quicker than an n/a R34. I don't see what you are getting at here. LOL :P

I'd put in a fresh o2 sensor in too, helps during cruise and for fuel economy.

Old injectors can cause issues too with slight misses at light throttle inputs. A friend and I have experienced that. Cleaning them usually won't help due to age/wear and tear.

Ahhh okay thankyou will do. Any chance you would know anywhere that sells standard injectors. I shopped around a while back but could only get turbo ones which were something like 600cc from 999...

Thats a good idea I'm gonna have to have shares with the Commonwealth to buy the injectors from them but hopefully it'll work thanks. Was just hoping to get some new ones really anywhere apart from nissan:-/

  • 1 month later...

So for future reference if anyone has this issue. It ended up being my "tps sensor". It was tested by an auto electrician and everything was working as it should right voltage etc. I managed to get one off a car someone was wrecking and car runs fine now.

Im just curious, how much rwkw you running now in total? Cause a standard N/a skyline is roughly 90 - 100rwkw, gaining 60rwkw would mean you were running 40rwkw before? Unless you are putting out more than factory?

  • 3 weeks later...

Total is 163.4 from memory. Made a massive difference after the tune when it was done. It was like driving a completely different car power wise. When I chnaged the Tps sensor over I put the connection as far down as I could as the further I moved it up the more the car reved and it hasn't played up once since I've done so. And its a manual transmission :-) couldn't make myself get an auto:-P

  • 4 weeks later...

Hello I'm new to skylines Australia. I have a very similar problem atm with my rb25de neo

When in get up in the rpm say at 3500rpm there is a flat spot for a second then after the flat spot it picks up again

It's kinda like it's not getting enough fuel but i have a few things I got to look over but I just need someone else's input to help me. Ty

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



  • Similar Content

  • Latest Posts

    • A 1.5 way is a 2 way. It is just a 2 way with a less aggressive ramp on overrun.
    • The ABS and/or TCS being missing/broken will not cause the engine to misbehave. It just casues CEL to come on and annoy you. The CEL is useless if it is always on, so you have to do the things you have to do to get rid of it, so it can be useful. Being a Stag ECU, then yes, it will not expect TCS to be present. But it will expect ABS to be present and working. You will need to either make the ABS CU talk to the ECU (don't ask me what that will take on an NA R34), and make sure the hardware is working....or, you just need to blank it out in Nistune. Do not persist with the stock ECU. You will just have problems. Gte it Nistuned. Start from there. DO YOU HAVE A BOOST SENSOR? The ECU's boost sensor that it. It is connected to the loom at the rear of the coil cover. Usually rides on the firewall on an R34, but is usually bolted down to a bracket along with all the other crap at the back of the coil cover when a Neo is dropped into another car. If you do not have it, the ECU will shit the bed. So, do you have one?
    • So sadly the fuel pump etc was not it. The pump and filter is new and it is still cutting around 4000 rpm. A read something about ABS/TCS (engine is from stagea and ECU too so no TCS) and i dont know for 100% that my car has ABS. It has ABS "cube" in engine bay but i dont think it works(or at least from my braking experience). Can be something like that?  I will be driving the car next week to Nistune tuner to properly see what is wrong...  
    • the Tomei LSD fluid with lsd kit. frustrated that it was shaking the car to crap and affecting everything else negatively, I pulled the diff last night, and removed the lsd carrier, could not find anything wrong, however it seem to be 100 locked up acceleration, and deacceleration, wondering if they sent me a 2 way not a 1.5??  either way I installed the stock open carrier back in place. test drove everything smooth as butter again. no shake, shutter, random, what felt like clutch slip and grab or drive shaft play, etc. something differently wrong in side the lsd. I might bother taking it apart (if possible) to figure out what's going on inside this carrier, as bought too long ago to return.  only draw back is its back to a one wheel wonder.
×
×
  • Create New...