Jump to content
SAU Community

Nissan Silvia S15 Idle problems and stalling (again)

silviaz

By silviaz,
in General Automotive Discussion

 Share

Recommended Posts

silviaz Experienced

silviaz

Posted
Posted

So after what the mechanic did it made a world of difference and worked much better. But still sorta got the same issue which is that it stalls when going uphill. also the car idles bad the tachometer moves very slightly up and down here are videos from after what i did to try fix it and seems to be a bit better. The idle also sounds better with the aircon on. Here is what I've done so far to try fix it:

 

* New spark plugs from 2 months ago

* Changed oil 2 times (first one for testing and it went black quite fast but now got brand new Penrite 10w-50 I think it is + filter)

* Cleaned IACV Valve was quite dirty but don't know how much it is (gasket is broken but used some gasket filler no leaks, might replace gasket later)

* Cleaned throttle body was filthy as well but didn't originally fix problem

*  New radiator coolant

* Cleaned pcv valve was dirty to but did rattle before cleaning and don't think it made much difference

* Unplugged air flow sensor while car is on and it turned off so that indicates to me the sensor is good

Don't know what it could be, don't think it's the coil packs, haven't checked oxygen sensor. What do you guys reckon it is? Maybe pressure plate? Don't think it's the head gasket. I wanna try work on some stuff until he arrives see if I can fix the problem in the mean time.

 

This first one is with air con on the idle sounds better and second one is with aircon off and idle sounds worse

niZmO_Man Grand Master

niZmO_Man

Posted
Posted

You need to pressurise the intake to find a boost leak.

You haven't posted about what mods your car has, so we assume it's standard.

BOV:http://jp-carparts.com/nissan/part_detail.php?maker=nissan&type=89&cartype=7&fig=144&part=1448369F02&page=2&img=144B 002

GTSBoy Grand Master

GTSBoy

Posted
Posted
14 minutes ago, silviaz said:

I dont think this car has a blow off valve? 

Don't make the mistake of thinking that all BOVs are externally venting wank noise makers. The Nissan turbos had recirculating BOVs, although it is technically more correct to call them a compressor bypass valve.

silviaz Experienced

silviaz

Posted
  • Author
Posted
5 hours ago, GTSBoy said:

Don't make the mistake of thinking that all BOVs are externally venting wank noise makers. The Nissan turbos had recirculating BOVs, although it is technically more correct to call them a compressor bypass valve.

Ah ok looks like i need to take apart the turbo according to that diagram?

GTSBoy Grand Master

GTSBoy

Posted
Posted
35 minutes ago, silviaz said:

Ah ok looks like i need to take apart the turbo according to that diagram?

Not sure why you would say that. To pressure test the inlet tract you should probably google up a guide - it has been discussed here bazzillions of times. You basically just need to access the inlet of the turbo (and some bits and pieces).

The diagram you were shown, shows all the pipe and shit that could participate in a vacuum/boost leak. I've circled the BOV for you

image.png.aafbfdec9c55a8e69528b6560702ec96.png

cheers

  • Thanks 1
silviaz Experienced

silviaz

Posted
  • Author
Posted
50 minutes ago, GTSBoy said:

Not sure why you would say that. To pressure test the inlet tract you should probably google up a guide - it has been discussed here bazzillions of times. You basically just need to access the inlet of the turbo (and some bits and pieces).

The diagram you were shown, shows all the pipe and shit that could participate in a vacuum/boost leak. I've circled the BOV for you

image.png.aafbfdec9c55a8e69528b6560702ec96.png

cheers

My bad it looked like i needed to looking at the diagram lol

silviaz Experienced

silviaz

Posted
  • Author
Posted
On 1/15/2020 at 5:26 PM, GTSBoy said:

Not sure why you would say that. To pressure test the inlet tract you should probably google up a guide - it has been discussed here bazzillions of times. You basically just need to access the inlet of the turbo (and some bits and pieces).

The diagram you were shown, shows all the pipe and shit that could participate in a vacuum/boost leak. I've circled the BOV for you

image.png.aafbfdec9c55a8e69528b6560702ec96.png

cheers

Fixed it. Timing was out by one tooth

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

    • bcozican
      R32 Gtst - Track Car

      By bcozican · Posted

      me too wasnt real happy and cost me a penny or 2 to replace
    • GTSBoy
      Anyone know this frontpipe?

      By GTSBoy · Posted

      But there's the archetype for the name plate! Here's my view on that stupid TÜV ruleset. Buy a brand name aftermarket piece of equipment. In this case, the Mines front pipe we're talking about. Get it TÜV certified on the car. Damage the underside of it, say on a speed bump. Cut out the damaged section, replace with fresh metal. (For the sake of the argument only), continue doing that to the whole pipe until it is all gone, replaced with new metal. Is this grandfather's axe still the same front pipe? The design hasn't changed (much). The pipe walls are in the same places. The flanges are in the same places. It is functionally identical. How does this differ from a pipe that is ever so slightly different in fabrication (ie the number of welds in it, a few mm here and there in terms of where the pipes run, are joined, etc)? Anyone with 0.5% of a brain can see that there is absolutely no way that the performance (power, environmental aspects, noise, etc etc) of it can be any different than the genuine Mines pipe. Maybe even Mines made 2 versions of this design, with the same differences. How would anyone (say a TÜV inspector) ever be able to differentiate between them? And yet, they are so bloody anally retentive about this stuff. Mad. How upset would they be if you had the wrong spring washers on the flanges?
    • Rezz
      Phone photo thread

      By Rezz · Posted

      Sakura (cherry blossom) tree at the end of a path going through Kabutoyama Park in Nishinomiya, Japan. Taken with Sharp Aquos R8
    • Rezz
      Anyone know this frontpipe?

      By Rezz · Posted

      After a fairly extensive search using Japanese terms and checking Minkara etc, I couldn't find anything even close to your front pipe in the photos. I'm no expert but the two pipes merge really close to the flange connected to the catalytic converter which is rather unique from what I've seen, which makes me think it's more than likely a custom front pipe. The welds and 'more pipe sections than usual for a brand name pipe' makes it seem like a custom one.  Here's some photos of an old Mine's front pipe. You can see that it's just 4 pipe sections as opposed to 6, and arguably looks more like a 'production' front pipe:
    • dee242
      Looking for r33 ac line

      By dee242 · Posted

      Wtb r33 low side s2 ac line 
×
×
  • Create New...