T25 Compression Low

Discussion in 'Mech Tech' started by PSG, Feb 27, 2015.

  1. davidoft

    davidoft Sponsor

    And the timing mark on the crank ?
     
  2. PSG

    PSG

    Yeah it is in line. I will make sure to take a photo at some point. Probably Monday.
     
    davidoft likes this.
  3. You are doing compression test at full throttle? I got 75psi on 1 until I remembered that... :oops:
     
  4. PSG

    PSG

    It's not running mate. I am testing on crank over without dizzy on
    Or have I misunderstood
     
  5. Still need to have throttle wide open (or carbs removed) so it's not restricting the inlet airflow.
    Unless it's fuel injected in which case I'll admit I don't know...
     
  6. He means have your foot flat on the throttle while you crank to get the compression reading
     
    MarcT512 likes this.
  7. PSG

    PSG

    No its not injection.
     
  8. PSG

    PSG

    Didn't know that was how it's supposed to be done. I am clamping the fuel pipe too though yeah?
     
  9. PSG

    PSG

    No idea.
     
  10. davidoft

    davidoft Sponsor

    Yes
     
  11. PSG

    PSG

    That's what I meant.
     
    davidoft likes this.
  12. davidoft

    davidoft Sponsor

    It is, the fuel pump is next to the dizzy, have you pulled the fuel line off the carb to see if you have fuel bring pumped up ?
     
  13. PSG

    PSG

    I will do that but I presumed as it stank of petrol that it was ok. But that is another thing to check.
     
  14. davidoft

    davidoft Sponsor

    Yeah it's probably ok, at the minute my money's on it being flooded, whip the plugs out like I said Further up clean etc and give it another go, make sure you have a fully charged battery etc, until it's been running really properly a compression test won't tell you enough, you have enough compression for it to run ok, 6bar is low but not silly low, once it's running it will only be evident at idle and a bit low on power
     
  15. PSG

    PSG

    Cool it's a plan.
     
    davidoft likes this.
  16. PSG

    PSG

    just had a bit of a brainwave or an idea today, i did mess with the gear linkage / coupler to get the gears working, that might have slipped meaning i am trying to pull away in third maybe? worth a look.

    it feels like it is stalling when i try to pull away. i have mu whole body crossed that this is the remedy. PLEASE be the remedy. albeit a stupid one.
     
    davidoft and pkrboo like this.

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