Read these plugs?

[EagleMark]

Holy crap,read the thread-is that the chip in this truck?

To translate into OBDII it means that the fuel trims were set to always read correctly regardless,as 128 is dead on?

Reminds me of back when I first started and didn't understand the computers much and wondering why I couldn't just set the stoich to 12.5:1 and just be done with fueling :)

This was a professional tuner as well?

Yes 128 in OBDI is perfect like 0% trim in OBDII.

Not sure what is in this chip yet I have not received it. The other thread is what happens on third adjustment to a custom tune from TBIChips.com...

I'm sure I can make it run good, all the others were easy. I'm just spooked as I know what get's done to BB tow rigs and this one comes from factory with no knock sensor! Knock sensor retards constantly to max retard on other when towing. I've even got chips with retard taken out! When I get the chip I'll know more...

So back to spark plugs... WTF?

[1project2many]

Some things are just hard to get right without being there. There's a ton of heavy black carbon inside the outer shell, deposits on the ground strap, and it appears there is oil on the outside of the shell on the second plug. It does look like oil burning. It also looks like the plugs might be the wrong heat range for this engine although that's hard to imagine looking at where the center electrode is in relation to the shell. The scary part is all the little chunks or balls stuck to the center electrode on the wet plug. Every time I've seen that it's been accompanied by melted piston parts. That line on the center electrode of the first plug, where it's dark above and light below, looks like the "timing line" you sometimes see on the center porcelain. If it is then the timing's too far advanced by quite a few degrees. And it needs fuel...

Is there a lead substitute additive being used? I see orange spots on one of the plugs. That additive can leave deposits on the ground side as well although it still looks like heavy oil burning on the one cylinder.

If the engine's damaged you'll get the same story pretty fast with a new set of plugs.

Is the engine owner going to try and add a knock sensor? Can we do leakdown tests?

[EagleMark]

The scary part is all the little chunks or balls stuck to the center electrode on the wet plug. Every time I've seen that it's been accompanied by melted piston parts. That line on the center electrode of the first plug, where it's dark above and light below, looks like the "timing line" you sometimes see on the center porcelain. If it is then the timing's too far advanced by quite a few degrees. And it needs fuel...

I was waiting for someone to comment on the little chunks or balls stuck to the center electrode, I call them specs...

[1project2many]

Unofficially... fly turds.

[34blazer]

Unofficially... fly turds.

thats what Grumpy called it in his plug cut write-up LOL

[ony]

I think I would wait till he runs another set of plugs before trying to tune it, looks like the plugs are to hot an some where in the calibration it is rich washing the oil off the cylinders walls, how are you going to tune it without basic timming an fuel in a data log? what is on his chip may not be what it is on a data log?

[RobertISaar]

looks like the compression ratio self-correction mechanism is functional.

[chevmasta]

If he has the 75.5lb/hr injectors 16psi isn't nearly enough with that setup.