my yukon denali 6.2 2015
misfire light now
In the live daters, cyl 8 is a misfire
And recently, cyl 4
P0300
P0206
P1248
I try
New plug
New Plug wire
New 8 fuel injector
New lifter with spring
Valve cover open and valve movement is good
maybe no damage to wiring
Please help....
misfire light now
In the live daters, cyl 8 is a misfire
And recently, cyl 4
P0300
P0206
P1248
I try
New plug
New Plug wire
New 8 fuel injector
New lifter with spring
Valve cover open and valve movement is good
maybe no damage to wiring
Please help....