Jump to content
SAU Community

Recommended Posts

hey guys, i have a r32 gtr which has been running a bit weird latetly.

at first it was occasionally about once a week, but now its getting more common, like at least everytime i drive it.

cold mornings its fine, once it starts warming up is when the problem occurs.

i first noticed it when i parked my car, let the turbo timer do its thing then just as i was walking away it started spluttering at idle, did that for 5 seconds then regained normal idle. it also did this while waiting at a set of traffice lights (even while i was rolling upto them) blip the throttle a few times and it sometimes goes back to normal idle.

why is it doin this?? its VERY annoying, ive even swapped the idle position sensor and still had the same problem.

also say im just driving down the road, it will even splutter (like its out of fuel?) nd have no response on throttle. then as im trying to accelerate in gear (while still doin speed limit, slowly gettin slower) it sounds like it misfires. sometimes this goes on for 5 mins and i cant even drive it, and other times its over in 10 seconds? then back to prefectly normal.

even if you hold your foot in the same spot on the accelerator pedal, it will cut out, accelerate, cut out etc..

i seriously have no idea whats wrong with it.. fuel pump? something to do with idle control? but that wont help the problem while at speed? it could be 2 different problems.

if anyone could help that would be GREATLY appreciated

Cheers.

Also check the cam angle sensor, you can just unbolt it and have a look. Mine had broken teeth causing this, replaced with $100 second hand CAS and worked fine.

^ When I changed the turbos it started fine, misfired after 20 mins, started feeling like you were turning the ignition on/off etc. I checked afm's, cleaned injectors, filter, ignition module, etc. Replaced the CAS with a mates, still no go, changed back to mine, worked fine. Turned out the plug for the CAS just needed a wiggle/twist. Dunno if your prob is the same but,

Coils: I'd unplug one coil to see if it sounds different/makes it worse. Check each coil, takes but a few mins.

AFM: I'd simply get AFM cleaner and clean it anyways, if it's the stock one. Few bucks, worth it.

CAS: Wiggle the plug/Unplug and reseat. Borrow one from a friend before spending money on replacement.

Fuel Filter: Cheap, but nasty to replace if you have big hands.

Plugs: How old?

cheers guys, its hard to diagnose cos its not always happening, just sometimes desides to do it.

wiggled/unplugged the CAS - same

its not the coils either, checked them

plugs are probly due for a change, but that would make it run shit all the time? or not?

but when i un-plugged the AFM it started to run shitty, exactly like the problem i explained above.. then after a few seconds it regains idle but wont rev over a few thousand revs, (not crisp anyway)

is there any sort of tests for AFM?? to see if they working correctly? or faulty?

thanks, will try to find an igniter and see how it goes.

but how do you know if the AFMs are dodgy? any way of telling? or just have to swap nd see?

just swapped the AFMs with another working pair from another GTR, seems to be working perfectly fine atm.

hopefully this is the problem! nothing worse than not knowing what the hell is wrong, hate guess work haha

need to find a set of AFMs now, or find out which one was faulty if not both.

thanks alot guys!

Cheers.

just swapped the AFMs with another working pair from another GTR, seems to be working perfectly fine atm.

hopefully this is the problem! nothing worse than not knowing what the hell is wrong, hate guess work haha

need to find a set of AFMs now, or find out which one was faulty if not both.

thanks alot guys!

Cheers.

Id replace both. If you do try to buy a set of nismo ones, they are more expensive but have the same characteristics of a Z32 meter which is good if you make some more serious mods to the motor.

Yeh I was looking at some nismo ones, still not sure yet.. Either quick and cheaper fix with STD ones or upgrade to z32 or nismo and get it re tuned. I do wana upgrade the engine later down the track tho, but my pockets arnt deep enough at the moment hah

May go for the cheap fix first then upgrade a bit later on

Cheers mate

fair enough.. looks serious! haha

i just got HKS pods, lookin to change to the Apexi setup.. will get onto nismo ones soon!

but in the meantime will std AFMs from a Aus delivered GTR work on an imported GTR? i was just wondering if they are diff?? probs a stupid question but am just curious?

cheers

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

    • I had 3 counts over the last couple of weeks once where i got stranded at a jdm paint yard booking in some work. 2nd time was moving the car into the drive way for the inspection and the 3rd was during the inspection for the co2 leak test. Fix: 1st, car off for a hour and half disconnected battery 10mins 4th try car started 2nd, 5th try started 3rd, countless time starting disconnected battery dude was under the hood listening to the starting sequence fuel pump ect.   
    • This. As for your options - I suggest remote mounting the Nissan sensor further away on a length of steel tube. That tube to have a loop in it to handle vibration, etc etc. You will need to either put a tee and a bleed fitting near the sensor, or crack the fitting at the sensor to bleed it full of oil when you first set it up, otherwise you won't get the line filled. But this is a small problem. Just needs enough access to get it done.
    • The time is always correct. Only the date is wrong. It currently thinks it is January 19. Tomorrow it will say it is January 20. The date and time are ( should be ! ) retrieved from the GPS navigation system.
    • Buy yourself a set of easy outs. See if they will get a good bite in and unthread it.   Very very lucky the whole sender didn't let go while on the track and cost you a motor!
    • Well GTSBoy, prepare yourself further. I did a track day with 1/2 a day prep on Friday, inpromptu. The good news is that I got home, and didn't drive the car into a wall. Everything seemed mostly okay. The car was even a little faster than it was last time. I also got to get some good datalog data too. I also noticed a tiny bit of knock which was (luckily?) recorded. All I know is the knock sensors got recalibrated.... and are notorious for false knock. So I don't know if they are too sensitive, not sensitive enough... or some other third option. But I reduced timing anyway. It wasn't every pull through the session either. Think along the lines of -1 degree of timing for say, three instances while at the top of 4th in a 20 minute all-hot-lap session. Unfortunately at the end of session 2... I noticed a little oil. I borrowed some jack stands and a jack and took a look under there, but as is often the case, messing around with it kinda half cleaned it up, it was not conclusive where it was coming from. I decided to give it another go and see how it was. The amount of oil was maybe one/two small drops. I did another 20 minute session and car went well, and I was just starting to get into it and not be terrified of driving on track. I pulled over and checked in the pits and saw this: This is where I called it, packed up and went home as I live ~20 min from the track with a VERY VERY CLOSE EYE on Oil Pressure on the way home. The volume wasn't much but you never know. I checked it today when I had my own space/tools/time to find out what was going on, wanted to clean it up, run the car and see if any of the fittings from around the oil filter were causing it. I have like.. 5 fittings there, so I suspected one was (hopefully?) the culprit. It became immediately apparent as soon as I looked around more closely. 795d266d-a034-4b8c-89c9-d83860f5d00a.mp4       This is the R34 GTT oil sender connected via an adapter to an oil cooler block I have installed which runs AN lines to my cooler (and back). There's also an oil temp sensor on top.  Just after that video, I attempted to unthread the sensor to see if it's loose/worn and it disintegrated in my hand. So yes. I am glad I noticed that oil because it would appear that complete and utter catastrophic engine failure was about 1 second of engine runtime away. I did try to drill the fitting out, and only succeeded in drilling the middle hole much larger and now there's a... smooth hole in there with what looks like a damn sleeve still incredibly tight in there. Not really sure how to proceed from here. My options: 1) Find someone who can remove the stuck fitting, and use a steel adapter so it won't fatigue? (Female BSPT for the R34 sender to 1/8NPT male - HARD to find). IF it isn't possible to remove - Buy a new block ($320) and have someone tap a new 1/8NPT in the top of it ($????) and hope the steel adapter works better. 2) Buy a new block and give up on the OEM pressure sender for the dash entirely, and use the supplied 1/8 NPT for the oil temp sender. Having the oil pressure read 0 in the dash with the warning lamp will give me a lot of anxiety driving around. I do have the actual GM sensor/sender working, but it needs OBD2 as a gauge. If I'm datalogging I don't actually have a readout of what the gauge is currently displaying. 3) Other? Find a new location for the OEM sender? Though I don't know of anywhere that will work. I also don't know if a steel adapter is actually functionally smart here. It's clearly leveraged itself through vibration of the motor and snapped in half. This doesn't seem like a setup a smart person would replicate given the weight of the OEM sender. Still pretty happy being lucky for once and seeing this at the absolute last moment before bye bye motor in a big way, even if an adapter is apparently 6 weeks+ delivery and I have no way to free the current stuck/potentially destroyed threads in the current oil block.
×
×
  • Create New...