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I went and grabbed some plugs today, meaning to get the TR-55 V-Power's and instead wound up walking out with TR55GP's.

Is this going to be an issue at all? It looks like the OEM Delco's were in fact a Platinum tipped plug?

It seems an awful LOT of people on here are fond of the regular TR55 V-Power. Is there some particular reason to prefer the TR55 over the TR55GP?

Thanks :D

That's what I heard here too, years ago. That's what I use now, the V power NGK. Supposedly the platinum plugs cause issues in a high compression engine like in the SC engines.

The big issue is the ignition system. Ours use a waste spark system, where the plug fires during ignition and exhaust strokes. Supercharged is worse and can detonate plugs. NA can usually get away with it, but plugs dont last as long. General preference is copper or iridium.

Take 'em back and get copper...

There is nothing wrong with those NGK plats in an NA application... But if you have not used them you could take them back and get the Copper NGK's and save a few bucks...

00Beast wrote:Take 'em back and get copper...

That's the plan! Seems like it would also be easier to 'read' the copper ones with their more traditional electrode. Thanks guys!

Gap should be .060 right?

55-60

nailbomb3 wrote:Gap should be .060 right?

Correct...

Copper is king on my Bonneville,s, tried Bosch platinum once, never again!

Swapped em out today, BUT this looks wrong to me:

Here's the back plugs:



And here's the front:



These would be from left to right as if you were sitting in the drivers seat. So if I have this firing order/cyl chart right it looks like the way cleaner plug is from CYL #6.

Are you using coolant?

That is weird...

Ummm, yeah its got coolant in it. It got flushed and filled last Febuary or so.

But it isn't leaking or ingesting any?

No, it isn't. We pressure tested it at the time and everything was golden.

Why do you ask? Thanks! To me it looks like #6 is running lean.

ETA: Went out and checked the radiator. It's full to the rim :D

I hate to have to pipe in on this but my #6 cyl plug was identical. Turns out (I hope this WAS it) my #6 cylinder was missing due to a loose plug wire. You might have a missfire

spoiledred94 wrote:I hate to have to pipe in on this but my #6 cyl plug was identical. Turns out (I hope this WAS it) my #6 cylinder was missing due to a loose plug wire. You might have a missfire

Interesting. I'm not sure because I bought the car used, BUT I'm fairly certain the plug wires in it are you guessed it....the factory wires. I have a set of the NAPA Belden Edge here, and hopefully I can get them on tomorrow. It's like 10F here and I don't have a garage to work in, at least all the time.

The thing is thou, wouldn't you think a NO spark condition, or a LOW spark condition would make the plug look RICH? Hrmmm...

ETA: How'd you figure out you had a miss in #6, and loose as in loose enough to not get any spark?

Thanks Brother!

I was getting an intermittent cough or spurt or cutout, right? So I chased it around with known coil packs and Ignition Module as well as new plugs. It was getting worse and I got a pending code, and finally a full on code. P0306 cyl 6 misfire. Had to be the wires so I pulled them all and cleaned every contact and took great care connecting the plug wires. Its been about 3 days and the misfire hasn't come back.

I think the white plug would look like that because there is not enough ignition to haze the plug. Gas is a great solvent. It could be keeping the plug white with all the gas that isn't burned.
I'd say to put your new wires on definitely.

Its cold here, and I don't have a garage either. (thou 40's a far cry from 10