twisted1

I have disconnect every bolt on, put new coils an still pings under load.

What ekse to check?

I also put new pkugs lwst week. Could one be bad? No ses light

BassAckwards

I assuming you have new plugs too?

What motor are we talking about here, and what year model?

How many miles?

What kind of gas are you using?

twisted1

Just put new maf an still pinging and stumbling under load aroubd 60ish

twisted1

06 screw 4.6 2v 4x4
93 octane because of diablo tuner.. I took it out an prob still here
111381.4 miles

twisted1

Did plugs last week
Coils yesterday
Maf today.

No check engine light

If I restart truck during stumbling it will go away for couple mins

BassAckwards

Damn, I'm not a mechanic but maybe get a compression check ran on it? I don't see why it would be pinging if you have changed all that and run 93.

twisted1

Pulled each I jector last night an tested them on work bench an ran cleaner through them...

STILL PINGING AN BOGGING!

Ok so my next thing is to tryvis o2 sensors an swap out plugs again. Maybe one is bad?

Any ideas? I also sprayed carb cleaner an starting fluid around vacume lines an nothing happened

Nothin' Fancy

Do a compression test

twisted1

twisted1

Ran 87 gas with 93 tune with partly cloged injector