2004 5.3l - Rough Idle, Misfires, And Lean Codes

[prime]

still running a rough, this was a gradual thing could this be bad fuel?

[riverbanks]

Did you clean the MAF? always worth a try

[Levi Goddard]

I have a 2004 gmc yukon. Changed fuel filter, checked plugs and wires. Newer coils. I'm getting a rough idle, and backfiring in intake when I put alittle throttle into it. Abs light is on but no engine light. Any ideas?

[davester]

7 hours ago, Levi Goddard said:

I have a 2004 gmc yukon. Changed fuel filter, checked plugs and wires. Newer coils. I'm getting a rough idle, and backfiring in intake when I put alittle throttle into it. Abs light is on but no engine light. Any ideas?

check for codes.  there can be codes, even when the CEL is off.

[Mnichols]

I fought this problem for 4 years, spent several thousand dollars… after beating my head against the wall and changing my 3rd fuel

pump, I noticed the ground wire in the plug was burnt… replaced the harness … truck has never run better… hope this helps 

[BBBB]

! What plug had the burnt ground wire? Can you tell by looking at the plug when it's disconnected?