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Rb20det Onevia... It's Sick :(

AMS

By AMS,
in Engines & Forced Induction

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AMS Grand Master

AMS

Posted
Posted

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

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Absent Community Regular

Absent

Posted
Posted

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

AMS Grand Master

AMS

Posted
  • Author
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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?

Tangles Grand Master

Tangles

Posted
Posted
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.......

AMS Grand Master

AMS

Posted
  • Author
Posted
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?

Tangles Grand Master

Tangles

Posted
Posted
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?

AMS Grand Master

AMS

Posted
  • Author
Posted

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?

AMS Grand Master

AMS

Posted
  • Author
Posted

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

barnoon Experienced

barnoon

Posted
Posted

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.

AMS Grand Master

AMS

Posted
  • Author
Posted

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

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