Jump to content
SAU Community

Getting A Compression & Leak Down Test.need A Heads Up?

itshimdazza

By itshimdazza,
in Victoria

 Share

Recommended Posts

itshimdazza Rising Star

itshimdazza

Posted
Posted

Guys,

My car is starting to blow smoke under acceleration (oil) and am about to get the compression checked but i need to know what is & should the compression (psi)be, so I dont get shafted by the mechanic?

Dazza

Link to comment
Share on other sites
Rowdyr32 Mentor

Rowdyr32

Posted
Posted

What colour is the smoke? Oil is white. To much fuel is black. Compression really depends on the quality of the test gauge being used as I can bet nobody has ever calibrated one. If all cylinders on the tester are within 5-10 psi of each other it shouldn't be to bad for an older motor. If you can change plugs in your car you can do the test yourself its easy.

Link to comment
Share on other sites
itshimdazza Rising Star

itshimdazza

Posted
  • Author
Posted
What colour is the smoke? Oil is white. To much fuel is black. Compression really depends on the quality of the test gauge being used as I can bet nobody has ever calibrated one. If all cylinders on the tester are within 5-10 psi of each other it shouldn't be to bad for an older motor. If you can change plugs in your car you can do the test yourself its easy.

Well guys,

I have had the compression test and its about 160psi +/- 5 PSI within each cylinder and all appears well with the motor. Now does this mean its the turbo that is making the smoke? is there some sort of seal inside the turbo?

Dazza

Link to comment
Share on other sites
KURAUN Grand Master

KURAUN

Posted
Posted

not sure on eastern side, im the northern burbs

there is a place in somerton (near campbellfied) called rotomaster

they do an awesome job, built my hiflow and great service

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

    • 70RTY
      JDM R35 Bought at Japanese Auction

      By 70RTY · Posted

      Hi all,   I have been a member here for years and am back to owning an R35.  It's my car and thought members of the community might enjoy sharing my journey.  I am definitely here to join the conversation.  If sharing this content isn't appropriate or it belongs somewhere else, I am happy to have it deleted or moved...
    • Dose Pipe Sutututu
      R34 GTT RB rough idle problem with weird RPM gauge fluctuations

      By Dose Pipe Sutututu · Posted

      Data looks rock solid? I'm assuming you jabbed the throttle twice OR once? the TPS voltage moves up and down twice, however you've mentioned you did it once.
    • luke gtr
      JDM R35 Bought at Japanese Auction

      By luke gtr · Posted

      Having not watched the videos, I'm unsure, but this may be better suited to the importing thread?
    • Joni Boi
      R34 GTT RB rough idle problem with weird RPM gauge fluctuations

      By Joni Boi · Posted

      Update on this situation: (Forgot to put in my previous post that I bought another brand new pressure gauge and fuel shows the same 50psi) I've deleted all the aftermarket immobilizers and turbo timer shyt and placed all factory wiring back to normal. The problem is still the same and nothing changed, but atleast it's a bit more tidier under the steering wheel. I've also siphoned out all the old fuel and then poured new batch of BP98 fuel (about 15L) into the tank. Nothing changed. Still the same idle. I also changed out the MAP vac line with a new one and, still the same.  So 2 days ago, I thought fk it. I'll just change out the fuel rail and injectors with another set that I know worked well in my brother's R34 a while back. That other fuel rail has the exact same Xspurt 640cc as what I have right now. So I changed it out to that other fuel rail and injectors (new O-rings) and injector harness. Put everything back together, started the engine, 464906286_1624569924763105_5179888796065901094_n.mp4   and yeah... still the same 50psi and idle problem. 🫠 I can also hear each of injector's solenoids running when I put a screw driver to it and have the other end to my ear. I might get a noid light just to confirm pulsasion but yeah, very strange that both fuel rails and injectors put out 50psi.  31-10-2024.csv I've attached it here. I started recording, then started the engine and let it idle with no throttle, then at the end I applied a little throttle and then stopped recording.    So, now idk. I'm going to see if swapping out the brand new R35 coils to my old splits fires will change anything. 🤷‍♂️
    • PranK
      JDM R35 Bought at Japanese Auction

      By PranK · Posted

      Hey mate, nice work on the car. Just a quick note, people generally don't like it when you use the forums to dump and run to advertise your YouTube content. If you're gonna stick around and join in the conversation then great, but if not this might not be the best place for you.  
×
×
  • Create New...