Well looks like i wont be driving the truck until this gets solved. I changed my plugs today and find this.
The front 2 cylinders were like this but none of the others. Whats the cause. Also what should my AFR be. I have AFR, fuel pressure , and boost gauges.
Last edited by 1BadCC; 10-13-2011 at 12:48 PM.
Wow that's crazy I am not sure what would cause that.... BUMP.
ECSB 2kSierra 2wd 4.8L-K&N-HPtuners-Calspeed LT's-Magnaflow-Tahoe20's-HankookRH06
waiting to go in... 3.90s, 214/220cam
Last time I saw that was on an engine that went 200k without a tuneup. Not quite sure what would be makin yours do that though. Hopefully somethin small and easy.
Always buying things I dont need to impress people I dont know
Could it be the tune. Its in need of a tune pretty bad. Those plugs had 20k on them. What should my AFR be
There isn't really a correct answer to that question. A completely stock vehicle will be trying to reach stoich or 14.7:1 However you may reach the best or safest power at other ratios. What is your current AFR? Who tuned your vehicle as is right now?Originally Posted by 1BadCC
ECSB 2kSierra 2wd 4.8L-K&N-HPtuners-Calspeed LT's-Magnaflow-Tahoe20's-HankookRH06
waiting to go in... 3.90s, 214/220cam
Melted the plug. Too much timing. Try a colder plug.
AFR should be stoich at idle, just cruising with no load. WOT, depends on the combo and what it likes, but I think about 13.5 is the lean limit.
Last edited by Frenchy; 10-13-2011 at 02:31 PM.
2006 SilveradoLittle Black Bitch
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