Jump to content
SAU Community

Recommended Posts

Hey Lads

As stated my RB20DET Onevia isnt in the best of health at the moment. For some reason the car will not rev above about 3000rpm or so (well when it starts to build up some boost)... Car was running fine for about 200km's after I took delivery of it. But all of a sudden it just lost all power and feeling through the pedal and sounded like it was hitting the rev limiter (although only at 3000rpm)

So I have had all pipes checked and some replaced, I had the intercooler replaced, the fuel pump is fine, the injectors and gaps are fine. So the only thing I have been suggested to check is coil packs. Possibility?

Cheers

Chris

Advanced Motorsports

Link to comment
https://www.sau.com.au/forums/topic/123976-rb20det-onevia-its-sick/
Share on other sites

sounds like its in 'limp home mode' happened to my car a while back

the ecu isn't receiving a signal from a sensor so it doesn't allow the engine to rev past 3000 to protect it

on my car it was a faulty afm, check all our sensors (o2, afm, aav, etc) an ecu diagnostic will tell you exactly.

My 2 cents

Cheers Mate. AFM was replaced about 2 months ago...

Thing is it will rev past 3000rpm... but only if your not booting it. 3000rpm is all it will go up to with the foot flat, because it wont let it rev once it starts to make boost. If that makes sense?

Cheers Mate. AFM was replaced about 2 months ago...

Thing is it will rev past 3000rpm... but only if your not booting it. 3000rpm is all it will go up to with the foot flat, because it wont let it rev once it starts to make boost. If that makes sense?

sounds like afm? was it replaced with a new item, or 2nd hand one?

better try a nissan consult I reckon.......

sounds like afm? was it replaced with a new item, or 2nd hand one?

better try a nissan consult I reckon.......

Ahh so u do step out of the Stagea section hey? :)

Well the standard one died and was re-built.

It hasnt been re-calibrated yet though. So you think it may be that then?

Ahh so u do step out of the Stagea section hey? :)

Well the standard one died and was re-built.

It hasnt been re-calibrated yet though. So you think it may be that then?

yeah, I do actually.... mind you Im pretty clueless tho.

Id suggest that the afm isnt able to read the large volumes of air being sucked in by that dinkydi Onevia of yours. hence rich and retard.

How is the fuel economy? ratshit?

Nup economy isnt that bad at all... Which is the strange thing. I think its too quick for rich & retard. Although wouldnt it be spilling black smoke out the rear from excess richness if that were the case?

well it could possibly be coil packs. Would make for an easy solution. Pedal looses all feeling at around the 3000rpm mark when the foot is to the floor... So I'm not too sure. Will talk to you about it more on msn

Mate I know everyone else has suggested AFM but I had the exact same problem in my R32 with RB20DET it would cough and splutter at about 3k RPM and putting the foot flat to the floor would do nothing then all of a sudden it would surge back to life it turned out to be my AFM so yeah it seems likely this could be your problem too.

I'm thinking AFM too... This is a re-built one as the old one failed for some unknown reason. Hasnt been re-calibrated yet. Car is at a mechanics today getting a blue slip done. I'll get them to check the AFM for me

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

    • Hows your intake piping? Are you still running stock? Having in the stock AFM position would mean, if the BOV was shut/venting out, it'd create the almost stalling kind of effect right // "the rich pulse behaviour" due to MAF thinking air is flowing ? But this would be better than having the bov in the stock position + MAF on/just before cross over piping right?
    • Essentially, yes. Although I wouldn't put the AFM on the crossover pipe. I'd want to put it into what amounts to the correct size tube, which is more easily done in the intercooler pipework. I bought a mount tube for card stile AFM that replaces the stock AFM - although being a cheap AliExpress knockoff, it had not flange and I had to make and weld my own. But it is the same length and diameter as the stock RB AFM, goes on my airbox, etc etc. I don't have a sick enough rig to warrant anything different, and the swap will take 5 minutes (when I finally get around to it and the injectors & the dyno tune).
    • So to summarise, the best thing to do is to move recirc to between turbo and IC, and maf on the crossover pipe. Meaning I'd need a recirc flange, drill a hole in the piping on turbo outlet area. And drill hole on crossover to fit/weld maf sensor? Either that or put the MAF on the turbo inlet right?  Is an aftermarket recirc/blowoff valve recommended? Do currently have family in Japan so could probably bring something back with maybe a cheeky lil SuperAutobacs run?
    • Yep, so far most have said that it looks like corrosion on the wall from piston not moving. Which then has probably damaged the oil rings and caused those vertical marks. The longest the engine was still after the rebuild, was the winter of 2018 - 2019, plus the boat trip to Japan. When I shipped the car, it had normal gas in the tank but before that winter pause, it had E85 in tank.  In any case, even if either one of those was the cause, it happened close to 6 years ago and the car has been driven something like 30 000kms after the fact. Again, apart from the plugs and the dip stick, there is nothing in the way the car runs that would indicate what has been going on in the engine. I am going to consult a shop and ask their opinion, what would be the best approach. I do have some access to a garage I could use to diagnose further myself, but time is very restrictive. Might end up buying another engine that could be used while this one is being remedied. Without pulling the head, it will be impossible to find out if it needs another bore, but here's to hoping a hone would suffice.  Goddamnit, I would really have preferred this not happening.  
    • Boot is going to be replaced eventually. I just wire brushed what I could and rust converted. Then painted in rust kill primer. the spoiler also got repainted and plugs replaced on the ends. The under side of the bonnet is going to be black also, currently white. But red on the top side, same colour code as the silo to begin.
×
×
  • Create New...