Jump to content
SAU Community

Sudden Loss of Boost

400HP

By 400HP,
in Forced Induction Performance

 Share

Recommended Posts

400HP Experienced

400HP

Posted
Posted

Tonite when I was driving I stopped at a light and then when I started to accelerate again I felt a major loss of power in the mid to top end.

I accelerated again and when I looked at the boost gauge I noticed instead of 1.05 bar which it normally reads on full boost it noly had 0.5/0.6 bar. I had driven the car probably 60km or so today and didn't have the problem at all before that.

Anyway I pulled over, checked the hoses going to the solenoid and also to the boost gauge - nothing was wrong. I turned the car off and turned it on again and then the problem was gone.

This is the first time its ever happened... any ideas??

Link to comment
Share on other sites
400HP Experienced

400HP

Posted
  • Author
Posted

No electronic controller. I've removed the small boost restrictor from the vacuum hose going to the solenoid and its been running reliably for a few months. Just took the car out for a drive this mornng and nothings wrong either....

still can't explain it...

Link to comment
Share on other sites
Guest KILLER-T

Guest KILLER-T

Posted
Posted

I think the best thing to do is IF it happens again pop the hood and look at the waste gate actuator arm and see it its holding it open and take the return pipe off the BOV and see if its leaking air

Link to comment
Share on other sites
Robo Community Regular

Robo

Posted
Posted

Hi There,

Not too sure if this is the same problem as what I had..

I had a bleed valve system (two bleed valves) running around 8.5 psi (some times I put it up to 10psi).

It has been in there for well over a year and never had any spiking or problems.

Until one day after a drive (30K's or so) after sitting at lights took off (foot flat) and as soon as the boost started climbing all power would just stop... like the speed limiter stoping petrol going in...

Only did it when boosting, I could do light acceleration but as soon as I floored it, a massive jolt woulld happen cause the engine cut out...

Anyonw know what that is?

I turned the boost down slightly to 8 and it was fine (ohh boost gauge is accurate... checked).

I have also noticed recently at 8 psi and about 4500 rpm on wards the boost feels a little jerky like not smooth.. (never done that before until after the power loss).

cheers

Rob

ps. mods - air filter, fmic & boost everything else is stock.

Link to comment
Share on other sites

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • GoHashiriya
      From Japan and back to Europe, my sh*tbox R34 GTT

      By GoHashiriya · Posted

      lol, yeah, and how gutted I am now I’m back over in Europe (actual Europe) and dealing with the nightmare of U.K.-Continental Europe bureaucracy.   Anyway, arrived in NL early January with the BMW, whilst the Skyline followed suit about a week later. Both cars ended up stuck with their relative importers for about six weeks. Since then, I made a trip to the Nurburgring with a friend and have since ditched the Skyline in the garage. This week, I finally managed to find a suitable shop to do an alignment so hopped on over to Germany to fix the miserable mess the local Netherlands shop conducted; the car was just not aggressive enough in the rear for my driving style - I found myself understeering a fair bit at the ring which was really a first for me with this car. Mis-matched F&R tyres can be held partly responsible - have now moved to F+R NS2Rs. One thing I’ve noticed is the 180kph limiter just does not cut it here. I quickly hit that (for the first time) in Germany on the autobahn. Japanese circuits are small - at least the ones that were near me. I rarely spent much time in 4th. After much deliberation with the HKS SLD, I have ordered Nistune from Matt. Whilst the Skyline has been gathering dust I got to learning the highly neglected BMW I bought in the U.K. was in fact just that, highly neglected. Took the ol’ dog down to Switzerland last weekend with a progressively deteriorating front end. It went from vibration during braking at highway speed on the way down, to vibrating non-stop on the way back. I’ve already fixed numerous engine issues - low oil pressure, f**ked injectors, incorrect coils and plugs, electric water pump. Still to do is a suspension and brake overhaul, rear subframe replacement and likely more ageing engine electrical components. But I must say, I love it. After so long with the Skyline, I really didn’t know cars could be so comfortable.    
    • TurboTapin
      R32 GTST - 600KW+ RB28/CD009 Build

      By TurboTapin · Posted

      Thanks. I adjusted my soft cut to 7600rpm and if I see I'm still making power there, I'll consider readjusting to possibly 7800rpm while on the dyno. 
    • LjB123
      R34 GTT Wiring Harness Similarities

      By LjB123 · Posted

      Yeah not sure. I sourced another relay no problem, its definitely a relay according to Nissan parts, they used those specific relays on a bunch if cars around that time, but my two options are, find a behind dash wiring loom which is proving difficult, or get the current loom fixed up by the shop when they put my rebuilt engine back in, they are confident in their auto electrical abilities. Thing is my current loom has anti-theft stuff and GPS immobilisers wired into it so easiest option may be to just fix the current one to save ripping apart the immobiliser. 
    • winc
      Asking where to source parts

      By winc · Posted

      Took it apart to get to the bearing found out i was wrong the bearing was pressed on to the diff side and the part i removed only had the bearing side, checked the bearing all looked fine took the shaft end to a shop and they recon it was movement from back and forth that made the marks and not rumbling about, so i just changed the seal and put it all back again.
    • GTSBoy
      R34 GTT Wiring Harness Similarities

      By GTSBoy · Posted

      Oh dear. That's um. There's like. Um. a lot of bare wires there. Take the whole thing out. Something is very very shorted somewhere. IT IS NOT CAUSED BY THAT "RELAY" (assuming it is a relay).
×
×
  • Create New...