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  1. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    So last update I hope the only problems I have yet are the 02 sensors all 4 saying the heater circuit the truck won’t start after sitting for awhile I have to put my foot on the gas to get it to start I noticed if I cycle the key a few times it starts better which I learned from a forum on here...
  2. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    I think I figured out the mis on 8 also I bought some plugs off of Amazon and I think they were counterfeit I changed the plug and it seems like it’s running smoother the only thing is it cranks for a bit before it starts that’s the only thing that’s still wrong and the o2 heater circuit yet but...
  3. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    I checked compression already 170 on 8 all cylinders had awesome compression all the cylinders looked good I even did a pressure test to see if the head gasket was leaking and scoped all cylinders they all looked good better than I thought for having 258000 miles on them but I was thinking the...
  4. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    Yes it was the injector it’s running decent but still having o2 problems all four say they have a heater resistance problem and I have a misfire on cyl 8 but only at idle you have idea it would be appreciated
  5. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    Up date so it’s running good but I have a little misfire on 8 but only at idle driving it around no misfire but idle it’s misfiring only on cyl 8 I check the plug it’s got the right resistance and I’m still getting the stupid o2 sensor code for heater resistance any info will be awesome thanks a lot
  6. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    Alright like I said it’s running still have a little misfire on 8 but it m guessing that has to be due to it not firing so it probably fouled out a bit I’ll change that I got some more info from driving it but all of my o2 sensors have heater resistance codes I’ll post them just curious if these...
  7. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    It’s still has the original fuel pump that’s why I was wondering about the fuel pressure and yeah I checked the injector at the wire with a test light to make sure it was getting power thanks guys for all the help I we lost but I said I’d get it going again but with help do thanks again
  8. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    I just changed my oil it did smell like fuel and the cats a brand new just curious if everything else looks good like the o2 sensors I don’t have any other codes all the codes went away
  9. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    So I got it running decent but my fuel trims are out of wack I have the numbers from my scan tool with the o2 sensor numbers and my fuel pressure dips to under 40 psi when bring up the rpm’s my mass air flow is at 5.74 g/s that seems right just wanna know why my trims are out of wack thanks...
  10. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    No I just found out I wasn’t firing I did the injector test and that was the only one that didn’t make any noise I checked the wiring with a noid light and it’s getting power to the injector I must have got a faulty inject there all brand new so are the plugs and wires and coils all that’s brand...
  11. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    Alright I try that thank you for the info
  12. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    I didn’t see you couldn’t read what was going on and then here’s what the o2 sensors are doing it’s warm and at idle
  13. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    So again another update I found that injector 8 isn’t working and all the o2 sensors I put in a shit I’m getting power to all of them the give me readings I just don’t thing the right readings the other thing I found was when it’s at a higher rpm the check engine light will stop flashing anyone...
  14. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    I guess when I said hard starting it’s not like the engine struggles it just turns over more times on the first start and then the only way it will start is for me to give it gas them it will start after the first start it will start after that the other thing I noticed is that the higher rpm it...
  15. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    Definitely appreciate it I’ll go to auto zone and get hopefully a good set lol really do appreciate it thank you
  16. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    I just wanna thank everyone who helped so far it’s not fixed yet but I’ll get it just nice to know there’s still people that will help definitely appreciate it
  17. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    eBay they were expensive so I thought they were good maybe I got hosed
  18. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    I ran a injector test off my scan tool the other 7 make noise that one don’t but it’s doing the same thing it did before I changed injectors so I’m gonna see if it’s getting power if not hopefully that’s my problem thanks for helping
  19. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    So just a update I ran a injector test and my cylinder 8 injector isn’t firing could this be problem to everything
  20. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    And those o2 sensors are new new like I put them in when I did the cats a few weeks ago when this problem started it gave me the cat below threshold code and I know all the parts are original so I figured couldn’t hurt to change them since the truck was acting up anyway so I put new cats new o2...
  21. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    I’ll check the fuses I haven’t checked that yet thanks everyone for chiming in it helps even if I haven’t fixed it yet but I will fix it and hopefully on my own without taking it to a shop it was runny decent to then I had those lean codes and my mpg dropped from 15 a gal to 12 real fast so I...
  22. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    It did have more to I’ll hook it back up and let you know what I says it was something with the heater circuit if I remember right but I’ll get what the reader says also it take a while to start like if I don’t put my foot on the gas it won’t start
  23. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    I r an it everyday up until this point without a problem
  24. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

  25. J

    08 Tahoe 258000 miles hard starting and wet spark plugs

    It was close to warmed up I didn’t see if it was in close loop but I get codes saying all my o2 sensors have a problem but there brand new but it shows the o2 sensors are working

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