Jump to content
SAU Community

Recommended Posts

so its not at any particular rpm, but more so when the engine is under load?

I think it could be:

Could be the air volumes being measured by the ecu are wrong, this being caused by a boost leak or a fault in an electrical component (AFM, AAC, O2). either way, the air thats getting pumped thru the engine isnt matching what the ecu is reading. I dont think it would be a dirty pod filter or a collapsing pipe between the AFM and turbo because you're making full boost.

OR

Fuel system problem. when the engine demands alot more fuel when on increased boost from cruising or idle, the fuel pump might be bad and not be keeping up, or the lines/filters might be partially blocked only allowing enough fuel thru for idle and cruise mode....

So I'd check: AFM, O2 sensor, AAC valve - these bits you may have cleaned but could they just be broken? Fuel pump, all fuel lines, fuel filters, fuel injectors. All air lines and hose clamps, fuel pressure reg. to plenum line in particular. Alot of this shit you've done so on goes the process of elimination! :thumbsup:

hope i could help :D

cheers

rb25

Link to comment
https://www.sau.com.au/forums/topic/14988-slow-r33/page/2/#findComment-480213
Share on other sites

  • Replies 41
  • Created
  • Last Reply

Top Posters In This Topic

do you mean nissan Consult??

also the cat apparently has been replaced during compliance last year, if it has been replaced can it still be blocked taking into consideration that the car hasn't been driven more than 5000kms

Link to comment
https://www.sau.com.au/forums/topic/14988-slow-r33/page/2/#findComment-480319
Share on other sites

The Cat should be OK but a dose of super fuel or a bad misfire can destroy a cat in minutes, a solid knock can also break up the guts and send fragments into the system. A good exhaust shop should be able to pressure test before and after the cat and any other muffler in the system. On the cheap grab a dud cat from a complier, Knock the guts out, bolt on and test run, same deal if you can borrow a known good system to test.

Link to comment
https://www.sau.com.au/forums/topic/14988-slow-r33/page/2/#findComment-482074
Share on other sites

thanks guys for all your inputs but i took it to a guy i know who has a diagnostic computer and he plugged it in and said that the knock sensor needed reseting and it needed a tune.

does anyone know where the knock sensor is located? and how they tune the cars without an aftermarket management system.

Link to comment
https://www.sau.com.au/forums/topic/14988-slow-r33/page/2/#findComment-487839
Share on other sites

Originally posted by skyline33

thanks guys for all your inputs but i took it to a guy i know who has a diagnostic computer and he plugged it in and said that the knock sensor needed reseting and it needed a tune.  

does anyone know where the knock sensor is located? and how they tune the cars without an aftermarket management system.

anyone??

Link to comment
https://www.sau.com.au/forums/topic/14988-slow-r33/page/2/#findComment-498125
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



  • Similar Content

  • Latest Posts

    • Can you log IAT? Whilst WTA coolers have their place, doing any sort of sustained run is not one of them There are fixes that slow down the heat soak, like ice boxes, which don't last that long, and interchillers, which are fairly expensive, up grades to the WTA cooling radiator, which may require a bigger pump, and upgrades to the reservoir size,  and upgrades to the cooling fans, but, it all still heat soaks, and takes ages to come down in hot weather  For a turbo, that isn't locked into WTA like my PD blower is, can you not possibly swap to a nice air to air intercooler????, it would be better for sustained runs then, and have alot less things that could go wrong in my opinion 
    • So, the other thing I've sorted is a baseline dyno run up at Unigroup's new location. The auto trans was a little unco-operative by both shifting down when the throttle was floored on the dyno (so Mark had to ramp it up more slowly than in a manual) and also by shifting up at 6,000 even in sports mode instead of the indicated redline of 7,000 Still, on a hot day it made 240rwkw at 16psi which seems about right for 300kw (400hp) through an auto at the wheels.  The shape of the curve is not quite right because it was not full throttle to about 4,500 to stop it kicking down, but until I can get a tune on the auto trans control this was the best we could do.....full boost will be well below 5,000 once that is sorted, I'll get some data logs when I can to confirm For comparison, the R32 made 255 at 12psi (at 4,500) on the same dyno with tune, n1 turbos, cam gears, big exhaust but otherwise all standard so the v37 is likely a little better out of the box. One thing that is very clear is that the standard water to air intercoolers are not up to sustained use at full throttle in warm ambient temps. After about 5 runs (so only a few minutes full throttle), it was pulling boost and timing and dropping 10-15% power. Unfortunately I didn't get that printout and the Unigroup guys are away at the moment, will try and get hold of it on their return. So, looks like a healthy engine to start modifying and the only real area of concern is the w2a heat exchangers which the aftermarket has plenty of solutions for    
    • I maintain it actually looked really nice in person. So much so that I thought "No, this is illegal" but there it was, clear as day. I think we can easily call the wing and wheels/height to be transformative. Not saying it's better than the GR Whatever, or the 86, or the WRX STI or anything of that sort (the internet says it all bolts up so you can buy best of all worlds?) but it's still at least a thing and not nearly AS bad as people say.
    • That's less offensive than the previous gen.....except for all that ugly black tupperware around the edges. Blerck!
    • I leant out the window recently and took a picture of this new WRX. It looked real damn fine in person. It's faster around a track (stock) than a (stock) GR Yaris. It's much more practical despite being heavier. It's significantly cheaper. This gen tunes really well, much better than others. .... I think they're probably a lot better than people expect.
×
×
  • Create New...