2011 Tahoe squeaking

[Rocket Man]

New problem getting check engine light saying misfire on cylinder 7 but we have verified it’s sparking and the ohm check out on the injector any ideas

Swap things one at a time with an adjacent cylinder and see if the misfire follows. Swap the coil, the plug wire, injector, spark plug, injector harness etc. Id be willing to bet it’s either the plug wire or coil.

 

[Rummel6]

Found a cracked plug so replaced all them now I got misfire on cylinder 3+7 didn’t have this issue before my buddy did the did delet

 

[Rummel6]

Checked all that still saying cylinder 3and 7 misfire would the timing or the other sensor on the timing cover go bad and do this

 

[Rummel6]

found the issue buddy didn’t tighten the rockers right caused the misfire

 

[Rocket Man]

Did you swap plug wires?

 

[Rummel6]

Gotten oil leak somewhere around the filter and plug
Not sure where yet any heads up on a possibility’s

 

[OR VietVet]

Popular oil leak areas. Drain plug, oil filter housing area, oil cooler seal at pan, valve covers, rear of intake, oil pan seal, rear main seal, timing cover seal....etc.

 

[Rocket Man]

Also oil pressure sending unit at the back of the intake manifold. They leak and it runs down the back of the block.

 

[Rummel6]

What the engine sounds like now

 

[Rocket Man]

What the engine sounds like now

Sounds good. Still have a leak?