Recent content by Hellacious tahoe

  1. Hellacious tahoe

    07 Tahoe LTZ gas in the oil

    Thx for that piece of inte Mike, in my ruminations, failure of the ecm to deactivate the injectors of the 1,4,6 &7 cylinders could be the cause of my gas-in-the-oil tragedy. By the way, I measured the resistance across the pins on each of the injectors. I got 3.5 to 4.5 ohms across the team of...
  2. Hellacious tahoe

    07 Tahoe LTZ gas in the oil

    I wander what happens with the injectors when their cylinder gets deactivated. Does the ecm shuts them down? I was also looking at a DOD deactivator module that plugs into the obd socket. It is also supposed to regulate the fuel injection patterns for increased fuel economy. Has anyone had any...
  3. Hellacious tahoe

    07 Tahoe LTZ gas in the oil

    The truck is not driveable now, as I removed the intake to test the injectors and replace the oil pressure sensor. Will report on fuel trims as soon as I can take a spin. I wander if disconnecting the battery will reset the ethanol percentage data and the fuel trims.
  4. Hellacious tahoe

    07 Tahoe LTZ gas in the oil

    I also wander if my truck has the AFM high pressure pump that is known to leak fuel into the crancase. As far as I know, 2014 was the first year with that system, but Google AI insists that my 2007 truck has it. I haven't reinstall the intake yet, just in case I have to remove the valley cover...
  5. Hellacious tahoe

    07 Tahoe LTZ gas in the oil

    After the 250 clicks coming home when I bought it, I drained the oil which came out black and thin, much like strong cofee. I dismissed it as old 5w30 or 5w20 and I did not smell it. I wander if the engine would have been able to run 250 clicks with diluted oil. I then flushed it twice, then...
  6. Hellacious tahoe

    07 Tahoe LTZ gas in the oil

    I seem to have dual separate issues, both critical. Im handling the fuel in the crankcase first. Its just coincidence that the fuel in oil came after the ispection shop experience. The car drove 250 km when I bought it, no issues.
  7. Hellacious tahoe

    07 Tahoe LTZ gas in the oil

    I was tempted to apply 12 volts to the injectors, but refrained wandering if they work at 5 volts instead. I have the setup out, so I can still do it. At this point, with no visible injector leak and the fuel vapor return line dry, I'm starting to think of sabotage. Last fall I took the truck to...
  8. Hellacious tahoe

    07 Tahoe LTZ gas in the oil

    Short term trims were around -2 at idle. Long term trims were in the positive 5's if I remember correctly. I did smell the vapor return line next to the solenoid, no smell of gas.
  9. Hellacious tahoe

    07 Tahoe LTZ gas in the oil

    You may be right Fless, the injectors dont leak. I havent taken any out of the intake. I plan to measure resistance across the 2 prongs on each one of them. After is all in one piece, I will try to see what the pcm thinks about the ethanol content. Thx for your support, to all of you.
  10. Hellacious tahoe

    07 Tahoe LTZ gas in the oil

    Update: intake out to replace the oil pressure sensor and to test the injectors for leaks. I connected a fuel pump and a pressure gauge to the fuel rail, connected it to a battery. A second later, pressure went up to 100, then down to 80. All of the injectors are bone dry, so injector leaking...
  11. Hellacious tahoe

    07 Tahoe LTZ gas in the oil

    I did change the sensor together with the fuel pump. Just saw the flex fuel sticker on the fuel door. Today I replaced the oil pressure sensor and its screen. Since I must test the injectors, I took out the intake, will hook up a pump and a gauge to pressurize the fuel rack and check for leaks.
  12. Hellacious tahoe

    07 Tahoe LTZ gas in the oil

    Here is a pic of the evap code it had before replacing the valve. It also shows the model of my scanner, which provides limited data. How do I know if is a fuel flex engine?
  13. Hellacious tahoe

    07 Tahoe LTZ gas in the oil

    Thanks Joseph, for the warm welcome. I dont have any pics of the truck, will snap some for the forum next chance I get. For now Ill post pics of the wheels I got for the truck, which were peeled to metal, then painted with gunmetal appliance epoxy from Home depot. That is a tough coat that will...
  14. Hellacious tahoe

    07 Tahoe LTZ gas in the oil

    Thanks for your attention strutaeng. Prior owner did the rig, plugged one of the 3 pipes on that pump, which was wider than the correct one, I had to break it in pieces to remove it. I also replaced the fuel pressure sensor for the tank. Vapors causing the pcm to dial back the injectors sounds...
  15. Hellacious tahoe

    07 Tahoe LTZ gas in the oil

    Thanks Fless. I did a fuel leakdown test and from initial 55 psi it took over 20 minutes before it settled at about 40 psi, seemingly nrmal results. Fuel trims are negative at idle, climb up upon acceleration. Dont know about the ethanol percentage, pumps say up to 10%, will have to get back...
See more

Forum statistics

Threads
137,685
Posts
1,989,589
Members
102,686
Latest member
koomie98

Latest posts

Back
Top