Jump to content
SAU Community

Recommended Posts

hi guys

im having issues with my rb25

it has a rough idle, and when it is boosting has a sudden very violent power cut, with a very loud thud sound coming from the passenger side. but only for a brief second and keeps revving most times.

so far i have checked the following

its running 0.8mm spark plug gap

splitfire coils, have check look fine

new ignitor

AFM checked with know working one

and has a new fuel pump (tomei drop in)

checked cat and tested with decat

car has a power fc

voltages, knock, etc all look fine to

not sure what to check next?

Link to comment
https://www.sau.com.au/forums/topic/337611-violent-power-cut/
Share on other sites

hi guys

im having issues with my rb25

it has a rough idle, and when it is boosting has a sudden very violent power cut, with a very loud thud sound coming from the passenger side. but only for a brief second and keeps revving most times.

so far i have checked the following

its running 0.8mm spark plug gap

splitfire coils, have check look fine

new ignitor

AFM checked with know working one

and has a new fuel pump (tomei drop in)

checked cat and tested with decat

car has a power fc

voltages, knock, etc all look fine to

not sure what to check next?

boost leak? maybe? :cool:

what ever is wrong, it's pretty serious

ie a vacuum leak wouldnt cause this or simple config error

check the ECU, check for physical damage or component damage

check the connector into the ECU, is it firm and not loose / floppying with mangled wires hanging out

how is the state of the loom ? when it occurs anything odd in ETC, SENSOR SW CHECK ? (Drive with this on the screen and watch when it occurs)

what ever is wrong, it's pretty serious

ie a vacuum leak wouldnt cause this or simple config error

check the ECU, check for physical damage or component damage

check the connector into the ECU, is it firm and not loose / floppying with mangled wires hanging out

how is the state of the loom ? when it occurs anything odd in ETC, SENSOR SW CHECK ? (Drive with this on the screen and watch when it occurs)

thanks Paul ill check these out

i had the stand 8 input monitior up everytime i tested something new and it sort of didnt effect any of those

checked the pecks and nothing stands oput as being wrong there, even knock was quite low

does anyone think it could be fuel pump wirring?

  • 3 years later...

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

    • Pressure when IDLING, is meant to be 51PSi... So that amperage value needs to go up a fair chunk... I'd personally be factoring for more like 12amp at least on those runs, and at that point you need to hope the already there wiring doesn't drop you a volt or two, as that's a lot of fuel pressure flow drop off from 13.5 to 12V! Taking idle pressure of 51psi, means the pump will be drawing a MINIMUM of 9amps all the time based on your reading of the graph (3bar base, then allowing an extra 0.5bar for boost = roughly 51psi)
    • Hi all,  I am in the market for an R200 longnose diff out of a Z31 300ZX, or S12 RSX, DR30 skyline, or similar, in a 3.9 ratio.  Preferably a late model one with the M12 crownwheel bolts.  The only easy to find advert for one of these was my ad back in 2007 when I sold it on this forum.  I sold the diff as I had sold the car it goes to, but as it turns out, after 18 years I got the car back late last year, so now I'm looking for the diff !  If anyone knows where to find a longnose R200 LSD with the M12 crownwheel bolts, drop me a line at [email protected] - Bonus paid if soomeone comes up with the original diff (stranger things have happened !).  Cheers   Ben D    
    • Hi everyone, I used to post here a bit from 2004-2013, when I owned various Nissans, in particular my S12 RSX gazelle, which was sold in 2007.  As luck would have it, after an 18 year hiatus, the car found its way back to me last year, and over the past 11 months I have had the pleasure of restoring it with my kids.  One thing that I am after in particular is a 3.9 ratio R200 LSD for it.  I actually sold the one out of the car here back in 2007 , and it would be incredible if I could track down who I sold it to, so I can see how they have progressed over the years (and to be honest, to see whether I can get the diff back !).  Anyways, hi all and let me know "where are the R200 Longnose diffs all at these days ?  Cheers Ben D  
    • Arms will be the same as the G35 or 350Z, but as above, there was a change in the lower control arm where it connects to the ball joint.  That said, you can remove the ball joint cone from your old ball joints and fit them to the new ball joints.  To be honest, I didn't think the ball joints themselves were different. The main ball joint is a bit awkward to replace, you really need to remove the steering knuckle to press out the old one.  Some people have used tools to remove it in place, but it just seemed too hard to get to. If you are going to press out/in that ball joint, then you may as well just replace the bushings in the LCA and the compression rod.  You can buy the compression rod bushing from Nissan, but the LCA bushes, you will need to go aftermarket. Much cheaper than buying the whole arm.
    • Ha, well, it's been.... a bit of a journey. Things have taken much longer than I'd hoped. I'll probably put up a thread at some stage. Hopefully soon. The car's not done any kms since my update in June though, put it that way.
×
×
  • Create New...