Cant find my misfire

[bootlife]

Problem started if im running cruse control, when i go down hill and decelerate the converter unlock, no codes, but if i force clear computer it locks back up instantly. So i go to the trans shop. They said trans is in great shape everything is right, but have 2 cylinders misfireing and low volt on mass air meter, i replace the mass air meter, new injectors, msd coil packs, and a set of taylor plug wires, if im in park and hold the motor at 2500rpm for a min, light comes on for p0300. What can it be? Gonna change plugs today, but there only couple months old.

[bootlife]

Fixed it, was a combanation of things, i knew i had an injector messing up, all the ignition parts was off my old motor so they had 173000 miles on em. So it didn hurt my feelings to change them. New injectors, coil packs, plug wires. But still couldnt find my misfire. Swaped plugs with some ngks and its fixed, my old plugs wasnt 3 months old but i guess bad injectors and weak coil packs killed them.

[farmtruc]

or carbon tracking or a tiny crack in the plug.

[Tig]

Glad you found the problem.
I'm having an issue with mine, I have multiple misfires. When it locks up at cruising speeds I get a TC shudder. Only when it locks and when I stay at a consistent speed it will shudder after roughly 46mph it will stop.
When its cold the shudder is bad, when its warm out, its almost like there's nothing wrong. Its very weird.
Mine is an 07 Tahoe with DOD. I'm going to replace everything you had and also in the near future delete my DOD all together.
I did replace my plugs and wires. I'd hate to have to do my plugs again after spending so much for the Delcos but, looks like I may have to do after reading about yours.

[blacstar]

throwing parts at it always works. I hope you guys are not mechanics

[LQ4-TURBO]

[QUOTElist.star;522994]throwing parts at it always works. I hope you guys are not mechanics[/QUOTE]

What would you do in this scenario? They've been systematically checking each component Down the list.

[Tig]

throwing parts at it always works. I hope you guys are not mechanics

You are obviously more experienced and have the right contacts.

Me, not only am I new to the state, I don't know anyone. I have gone with mechanics who were recommended by people I work with or from google.
Every mechanic I have talked to or made appointments with have come up empty handed and come up with two responses 1. no codes no problems 2. replace the converter.
This is after about 10 hours worth of appointments and my time completely wasted.
It seems that I have moved to a place that is lacking competent mechanics.