LY6 engine

[ScottyBoy]

15 mpg is actually pretty decent.
I'm only getting about 12-13 in my Suburban. I'm lucky to get 16-17 on the highway.

 

[Texas Jim]

all i have is the tourque app i bought, it dosen't show the timing but my inlaw has a few of the computer obd 2 readers he uses on his car so after i replace the plug wires ill get together with him and c what the engine is doing (kinda sucks getting 15mpg)

If a good bit of your driving is in town... 15 MPG on the 6L engine is pretty dang good.

 

[66nova]

I get typically 11-12 with my 6.0 and 16-18 highway. Maybe 19 if the wind is helping me out.

 

[Draenor]

What you are getting "is" pretty decent. If your fuel mileage decreased, then it is not from a rough idle. You either have another underlying problem, winter blend of fuel, or a higher than norm increase in ethonol, such as E85.

 

[AaronG1981]

that is hwy mpg it dont miss a beat when driving but at idle its rougher than a few carbs i use to use on inline 6es

 

[AaronG1981]

i have a few sensors on the obd 2 scan that show up bad ill post em once i get em on my pc

 

[AaronG1981]

ok finaly got my laptop sorta working these r the codes my obd 2 scner says r not ok
mid 01 tid 06( 02 bank 1 lean to rich)
mid 50 tid 12
mid 71 tid 76
mid91 tid 33
midB0 tid 03
midE8 tid 30
are these causeing a big prob or just minor

 

[Draenor]

Im not familiar with these codes. What are the definitions for them? They should of came back with a P### or the such, which are ODB2 compliant codes.

 

[AaronG1981]

Its the codes tourque app shows but it dosent have p### or a defination ill c what else i can do

 

[AaronG1981]

i haven't got my hands on a good scanner atm ill post once i do, but in the meantime would a bad 02 sensor be a cause of this or would that throw a check engine light.