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6 liter misfire!

my 04 with 120k has had a miss fire code recently need advice!!!

6 liter misfire!

Postby Babbitt180 [OP] » Oct 26 2012, 2:53am

my 2004 Chevy 2500hd 6.0l vortec recently put out a random misfire code.... so i was told by a buddy of mine to try plugs and wires first, so i did replacing them with brand new Bosch plugs and a Bosch wires, that worked for all of a day then a very slight misfire came back, along with the blinking engine light, the code again was the Po300 random misfire code, i was told i can try new coil packs next or new injectors both i guess are famous for causing misfire problems with these motors.....? just wanna get some other input on this problem maybe someone else had this issue?

Thanks
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Re: 6 liter misfire!

Postby Babbitt180 [OP] » Oct 27 2012, 12:19am

Babbitt180 wrote:my 2004 Chevy 2500hd 6.0l vortec recently put out a random misfire code.... so i was told by a buddy of mine to try plugs and wires first, so i did replacing them with brand new Bosch plugs and a Bosch wires, that worked for all of a day then a very slight misfire came back, along with the blinking engine light, the code again was the Po300 random misfire code, i was told i can try new coil packs next or new injectors both i guess are famous for causing misfire problems with these motors.....? just wanna get some other input on this problem maybe someone else had this issue?

Thanks
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Re: 6 liter misfire!

Postby vic401 » Oct 28 2012, 2:59pm

you need to get a crank relearn done with someone who has either a gm tech2 scanner or something similar, my truck also 04 2500hd(gmc) was having this problem i tried plugs wires and a few other things and nothing worked, after the re learn i havent had a problem or engine light yet, the guy i had do it was alomst trying to talk me out of it saying it wont work but it really does
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Re: 6 liter misfire!

Postby Babbitt180 [OP] » Oct 28 2012, 6:02pm

Alright I will give that a shot because nothing else like you said is working thanks!
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Re: 6 liter misfire!

Postby starspangled6.0 » Oct 28 2012, 6:28pm

I had the exact same issue... had the crank relearn done ($25 and 5 minutes of time :) ), and she's running smooth now!
07 Silverado 3500HD 6.6L Crew Cab Dually
04 Silverado 2500HD 6.6L Extended Cab w\Hiniker 8.5 V
03 Sierra 2500HD 6.0L Extended Cab w\BOSS 8.2' V


http://www.integrityoutdoor.biz
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