Trouble shooting a no start again...

Discussion in '2005+ Mustang GT 4.6L Tech' started by xkillerxnatedog, Oct 28, 2019.

  1. 07gts197

    07gts197 forum member

    801
    30
    Stop guessing and start putting in some work troubleshooting. Youre not going to get anywhere by guessing.

    And even if the cam position sensors are faulty it should still run with waste spark (meaning it fires each plug twice on each bank since the ecu doesnt know which stroke is compression or intake). So I doubt thats the issue. Op did you get any timing codes like bank 1 or 2 over-retarded timing? I think the problem is mechanical in nature and wont solve itself by throwing parts at it in lieu of actual troubleshooting. I find it hard to believe that its just a coincidence that youre having these issues and a few spark plugs have damage to them.


    Sent from my iPhone using Tapatalk
     
  2. Dino Dino Bambino

    Dino Dino Bambino I have a red car

    Age:
    56
    721
    91
    Pull out the VCT solenoids and check the mesh screen. If it's clogged, there won't be enough oil flow to operate the VCT system properly. Your engine is behaving like it has lopey cams when your NSR stage 2's shouldn't be.
     
  3. xkillerxnatedog

    xkillerxnatedog Member

    98
    0
    Yea they have lifetime warranty so i can do that but how's bad camshaft sensors gonna cause smoke an oil in the exhaust an down in my spark plug electrodes?
     
  4. RLF9409

    RLF9409 My blood runs Ford blue!

    390
    25
    If your not firing correctly, the wasted fuel is mixing with hot exhaust (from the cylinders that are firing) causing the smoke. I am sure your exhaust is coated with unburnt fuel...
    I am still dumbfounded about the damaged plug...I would be really worried about it.
    There comes a time when you are beyond your mechanical abilities and need to find a professional. I would recommend before you spend anymore money on any new parts to just find a professional.
     
    Last edited: Nov 4, 2019
  5. xkillerxnatedog

    xkillerxnatedog Member

    98
    0
    Yea but how can bad camshaft sensors cause oil in plugs an exhaust
     
  6. RLF9409

    RLF9409 My blood runs Ford blue!

    390
    25
    If you re not firing correctly, the wasted fuel is mixing with hot exhaust (from the cylinders that are firing) causing the smoke. I am sure your exhaust is coated with unburnt fuel...
     
  7. xkillerxnatedog

    xkillerxnatedog Member

    98
    0
    So here is another tip.. Just pulled off my cai an tube an there is oil on the outside of my throttle body coming from my intake..
     
  8. xkillerxnatedog

    xkillerxnatedog Member

    98
    0
    Gottcha that makes sense but just found oil on the outside of my throttle body going into my cai tube..
     
  9. RLF9409

    RLF9409 My blood runs Ford blue!

    390
    25
    that's normal.
     
  10. 07gts197

    07gts197 forum member

    801
    30
    Im starting to think the op is trolling us. This thread is going nowhere because the op isnt putting in any work and is ignoring what we’re telling him to do. Either do a compression test/tear down or get it to a shop.


    Sent from my iPhone using Tapatalk
     
  11. xkillerxnatedog

    xkillerxnatedog Member

    98
    0
    Really I've never seen it drip out.. Everytime ive ever had the cai intake tube off... Ive never seen oil come out the throttle body this is a first for me to see that... So sounds like im going nowhere...
     
  12. xkillerxnatedog

    xkillerxnatedog Member

    98
    0
    I was just looking for help... Yea i plan on doing a compression test... I was just looking for advice.. Maybe hoping for the best.. Id rather rule out all the simple issue's it could be, before sinking money into rebuilding seals or piston rings an what not..
     
  13. 07gts197

    07gts197 forum member

    801
    30
    I understand that but youre not really taking our advice. Hoping for the best isnt going to solve anything, you need to start testing the basics especially when there could be mechanical damage. Bottom line is do a compression and leakdown test and go from there. Checking the cai isnt going to do anything for you.


    Sent from my iPhone using Tapatalk
     
  14. xkillerxnatedog

    xkillerxnatedog Member

    98
    0
    Il be trying to do a compression test thursday... So what numbers should i be looking at in my cyclinders
     
  15. Dino Dino Bambino

    Dino Dino Bambino I have a red car

    Age:
    56
    721
    91
    Should be 170+ psi on all cylinders at sea level.
    I fear that the unburnt fuel in the cylinders may have washed away the boundary layer of oil from the cylinder walls causing accelerated ring/bore wear. I really hope I'm wrong.
     
  16. Laga

    Laga Member

    66
    11
    i do t know where you got your numbers from, but they’re not correct. The engine has a 9.8-1 compression ratio. Air pressure at sea level is 14.7 pounds. Multiply them together for 144.06 pounds under perfect conditions. Yours will be lower than this. You can do a google search for your air pressure at your elevation. I’m at 600 feet above sea level, so mines at 14.0. Equals 137.
     
  17. Dino Dino Bambino

    Dino Dino Bambino I have a red car

    Age:
    56
    721
    91
    It isn't as simple as that. It also depends on the timing of the intake valve closure i.e. dynamic compression ratio. Here are the results I got from using this cranking pressure calculator.

    CID is 280.87 CID
    Effective CR is 8.47
    Cranking Pressure is 190.91 PSI
    Gauge Pressure is 176.22 PSI
    Atmos. Pressure is 14.70 PSI
     
    Last edited: Nov 5, 2019
  18. RLF9409

    RLF9409 My blood runs Ford blue!

    390
    25
    So what did the compression test say?
     
  19. xkillerxnatedog

    xkillerxnatedog Member

    98
    0
    So i had the compression test done, i didnt get the number but 1-4 had high compression, an oil was shooting out of the plug holes when we was cranking it over. cylinder number 8 had no compression at all he told me... So he believes that one of valve springs broke casuing my piston to come up an smack spark plug electrode on cylinder 8.. So he is suggesting that the head come off on bank 2 to check the head an piston on cylinder number 8... An told me that the oil leak is coming from cylinder 8 because of the no compression... So thats whys i got oil down in the rest of my cylinder walls....
     
  20. xkillerxnatedog

    xkillerxnatedog Member

    98
    0
    So should i move forward with what he's suggesting he said im looking at about 1000 bucks in labor for him to pull the motor go through it an me replace the parts what needs fixed an throw it back together