so i have an 06 ls and for the life of me i cant get this thing to stop having a miss on the number 6 cylinder i have changed out the spark plug and coil and did a compression test on it and cant figure out whats going on.
06 ls with number 6 miss
- Thread starter jel930
- Start date
04_Sport_LS
Dedicated LVC Member
V6 or V8?
joegr
Dedicated LVC Member
2006 was only the V8.
04_Sport_LS
Dedicated LVC Member
Duh... forgot about that.
joegr
Dedicated LVC Member
Okay, I wanted to make sure it wasn't P0356, which would be a clear electrical problem.
Let's also be clear about which cylinder is #6, driver's side, 2nd from the front. (front is 5, back is 8)
How are your bank 2 short and long term fuel trims? More missing when hot or cold? Plug gap verified to be 1.0mm?
AmsterDutch
Dedicated LVC Member
What brand spark plug? What brand plug? You obviously switch plugs and COPs from different cylinders that are working to #6 cylinder that has the miss with no avail correct? What color is the plug when you took it out Black, gray, brown , white? Have you used a fuel injector cleaner yet? Did you unplug the MAF connector before starting the LS and then start the car and see if it still runs or does it run like crap without the MAF plugged in?
AmsterDutch
Dedicated LVC Member
When was your battery replaced last? Are you getting the right amount of air...fuel and a spark in the engine....
If the mass airflow sensor or O2 sensors aren't working correctly, or the throttle body is clogged with excess carbon or if the engine air filter is very clogged... you might not get enough air into the engine... These all could make your LS have difficulty starting....At the end of the day....the most common reason that your car might not start up easily...even if it's only been sitting for a few hours.... is low fuel pressure.
If the mass airflow sensor or O2 sensors aren't working correctly, or the throttle body is clogged with excess carbon or if the engine air filter is very clogged... you might not get enough air into the engine... These all could make your LS have difficulty starting....At the end of the day....the most common reason that your car might not start up easily...even if it's only been sitting for a few hours.... is low fuel pressure.
LSV8Crisis
LVC Member
Check for fuel pressure loss? Sometimes injectors can get stuck or leak into the combustion chamber. Also, check for a loose injector connector. At this age, the plastic could be brittle so approach with caution.
04_Sport_LS
Dedicated LVC Member
Sounds like hot soak/heat soak to me.
"When the engine is shut off, the injectors undergo heat soak. Fuel residue evaporates in the injector nozzles, leaving the waxy olefins behind. ... Over time, these deposits can build up and clog the injectors. A vehicle may have low mileage, but short drive cycles and increased heat soaks can clog the injector."
"When the engine is shut off, the injectors undergo heat soak. Fuel residue evaporates in the injector nozzles, leaving the waxy olefins behind. ... Over time, these deposits can build up and clog the injectors. A vehicle may have low mileage, but short drive cycles and increased heat soaks can clog the injector."
04_Sport_LS
Dedicated LVC Member
Try dumping a full can of Seafoam injector cleaner, (fuel treatment), in the fuel tank at your next fill up.