Is this engine coolant on my spark plugs? P0300

Cory Gillmore

Hey guys I’ve been getting a P0300 the last couple weeks. It started the first cool morning I left for work after getting back from Z1 where they installed their CAI and upper intake plenum and tuned the car with ecutek.

Today I checked all my spark plugs really just making sure none had come loose and I noticed this green type substance but only on the white part of each plug where the coil pack plugs over it. The plugs weren’t wet on the bottom and I didn’t notice anything in any of the plug wells.

I guess I’m hoping this green **** is some kind of grease that Z1 puts in their coil packs…it’s got Z1 coil packs that I just put on about 3 months ago.

Any thoughts are much appreciated. I’m pretty bummed out with this P0300

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09 S/T 6MT: AAM S-Line catback exhaust Ti tips, Z1 CF CAI, Z1 ported intake plenum, Z1 high energy coil packs, tuned with ECU-Tek @ Z1: 332whp 261ftlbs

Rusty

What does it feel like? What does it taste like? What does it smell like?

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Cory Gillmore

Feels kinda greasy, smells like...not much, tastes like liver and fava beans with a nice chianti.

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09 S/T 6MT: AAM S-Line catback exhaust Ti tips, Z1 CF CAI, Z1 ported intake plenum, Z1 high energy coil packs, tuned with ECU-Tek @ Z1: 332whp 261ftlbs

Spooler

It is not coolant, that is for sure. It could be the grease put on the rubber insulator of the coil pack. I wouldn't worry too much about it.

Cory Gillmore

That's a relief. It'd be kinda cool if they didn't use grease that was the exact same color as my engine coolant.

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09 S/T 6MT: AAM S-Line catback exhaust Ti tips, Z1 CF CAI, Z1 ported intake plenum, Z1 high energy coil packs, tuned with ECU-Tek @ Z1: 332whp 261ftlbs

Rusty

Could be di-electrical grease. Use it to keep the boots from sticking on the plugs. If it had a sweet taste to it. It could have been anti-freeze.

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浪人 - 殺し屋
"The Difficult Anytime, The Impossible By Appointment Only"
http://www.the370z.com/members-370z-...o-journal.html

Dreadnaught

Wipe off all of the green shieeet from the spark plugs and from the coils. If the p0300 goes away then you know it was the grease. It could be causing arcing. If it still persists after that, you're going to have to join the ever since club and take your car back to Z1.

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Ford Diesel and Heavy Line Technician at your service.

Cory Gillmore

Well if it is the grease then it only started causing an issue 1) after Z1 tuned it or 2) after the weather got cooler.

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09 S/T 6MT: AAM S-Line catback exhaust Ti tips, Z1 CF CAI, Z1 ported intake plenum, Z1 high energy coil packs, tuned with ECU-Tek @ Z1: 332whp 261ftlbs

Cory Gillmore

Care to elaborate? Ever since what? Has Z1 changed ownership in that last few years or something?

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09 S/T 6MT: AAM S-Line catback exhaust Ti tips, Z1 CF CAI, Z1 ported intake plenum, Z1 high energy coil packs, tuned with ECU-Tek @ Z1: 332whp 261ftlbs

Dreadnaught

Ever since refers to customers who come in for an oil change for example. Then, they say "Ever since you changed my oil my brakes are squeaking." They then proceed to demand a free brake job or whatever they come back complaining about. It's a term Technicians use to describe these type of people.

I wasn't saying you are that type of person just used the term.

I've been a professional technician for 8 years and it makes me laugh everytime someone plays this card.

Any luck with your Z?

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Ford Diesel and Heavy Line Technician at your service.

Cory Gillmore

Ohhhhhh I see haha so it’s more at jab at those types of people rather than Z1. Yeah I mean I have asked Z1 for their input but I live 5 hours from their shop so I don’t see myself taking it back to them.

It hasn’t thrown the code since I got it back together yesterday but the real test will be tomorrow morning.

When I started seeing that green stuff on the coils I thought surely I had a blown head gasket. So I’m just relieved it’s not that.

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09 S/T 6MT: AAM S-Line catback exhaust Ti tips, Z1 CF CAI, Z1 ported intake plenum, Z1 high energy coil packs, tuned with ECU-Tek @ Z1: 332whp 261ftlbs

Cory Gillmore

Car didn’t throw the code this morning.

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09 S/T 6MT: AAM S-Line catback exhaust Ti tips, Z1 CF CAI, Z1 ported intake plenum, Z1 high energy coil packs, tuned with ECU-Tek @ Z1: 332whp 261ftlbs

Cory Gillmore

Still not ready to say all is well though. I did a bunch of stuff Saturday while I was under the hood. Cleaned my MAFs, tightened all the hoses, checked and retightened all the spark plugs, a few of which didn’t seem to be screwed in all that tight, though none were totally loose inside the well.

I did order a new fuel cap yesterday. Which is long overdue. I have thrown codes in the past if I didn’t screw the gas cap on just right. Which is a known issue, with the early Zs at least.

So I’m just going to continue to keep an eye on everything.

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09 S/T 6MT: AAM S-Line catback exhaust Ti tips, Z1 CF CAI, Z1 ported intake plenum, Z1 high energy coil packs, tuned with ECU-Tek @ Z1: 332whp 261ftlbs

Cory Gillmore

Car threw the code when I left work this afternoon �� How would I go about getting a datalog for Z1?

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09 S/T 6MT: AAM S-Line catback exhaust Ti tips, Z1 CF CAI, Z1 ported intake plenum, Z1 high energy coil packs, tuned with ECU-Tek @ Z1: 332whp 261ftlbs

FrankEtier

You have ecutek? If so plug the obd 2 Bluetooth in and use the ecutek app to data log.

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