5.3 fireing order

[joshc64311]

Any one know what the fire order is on the 5.3?

['17 Sierra]

Any one know what the fire order is on the 5.3?

1-8-7-2-6-5-4-3

[joshc64311]

Thanks!

[joshc64311]

1-8-7-2-6-5-4-3

Is # 5 AMF cylinder? I have a miss.

['17 Sierra]

Is # 5 AMF cylinder? I have a miss.

Are you throwing a code and that's how you know it's 5? I'm not sure if 5 is or not...50/50 chance I suppose!

[joshc64311]

Are you throwing a code and that's how you know it's 5? I'm not sure if 5 is or not...50/50 chance I suppose!

Yep the cel will flash and shut off.

['17 Sierra]

Is # 5 AMF cylinder? I have a miss.

I looked it up and if it's correct,1,4,6, and 7 are deactivated for AFM.

['17 Sierra]

Yep the cel will flash and shut off.

See if you can get a code reader to use. Even though the CEL goes out, a code reader will tell you if and what cyl misfired.

[joshc64311]

Just did that

[joshc64311]

I looked it up and if it's correct,1,4,6, and 7 are deactivated for AFM.

Thats what i keep coming up with, i thought AMF was the middle 4 cylinders. Im so confused lol

[joshc64311]

Here is a link to fireing order

http://www.gmpowertrain.com/engines/5-3l-l83.html

[Lbone]

Witch cylinder is number 6 on 2014 Yukon 5.3

[Lbone]

What is the fuel pressure supposed to be on a 2014 GMC Yukon 5.3

[CamGTP]

Cylinder 6 in the 3rd cylinder back on the passenger side.

 

Fuel pressure on the low side will be 30-60 psi give or take, it's an on demand fuel system with a computer controlling the fuel pressure. The high side fuel pressure can be 800-2000+ psi for the higher pressure fuel system.