Pontiac Solstice Forum banner

1 - 20 of 35 Posts

·
Registered
Joined
·
2,721 Posts
Discussion Starter #1 (Edited)
So I finally figured out what my rough idle at stat up was. Yesterday after starting up my GXP on a cold night, I got a check engine light come on, code P0301. Misfire in cylinder #1. The light stayed on but was not flashing and the car was running fine. I drove it home with no problems and it had plenty of power. I cleared the code when I got home. I searched the forum and people have said to change the spark plugs and the coil wire for spark plug #1 to solve the problem. So hoe hard is it to change these new electronic type coil wires on modern cars. I'm only used to old school coil packs. Also, would this be covered under the power train warranty? Found another member say that there is a service bulletin about this too. Say to do the exact same thing to fix the problem, something about a bad connection on the female part of the wire.
 

·
Registered
Joined
·
2,721 Posts
Discussion Starter #3
Undo the bolt and disconnect the connector and pull out the coil.
That's what I was thinking, but do i jiggle it and pull up at the same time like traditional spark plug wires? Do i need to turn it counter clock wise when pulling up? I'm always afraid of breaking that black piece of plastic.
 

·
Registered
Joined
·
731 Posts
Nah, it not a big deal. Just remove bolt ,then twist and pull up and there you go. Why you have pack off. Pull the plug and take a look.
 

·
Registered
Joined
·
2,721 Posts
Discussion Starter #5
This may sound stupid, but which one is cylinder #1? First closest to front of car bumper or 1st closest to rear of engine and front windshield? I don't see any numbers on them at all. Can any of you guys recommend the best spark plugs for performance? Don't tell me platinum anything because I know that copper is the best for performance and platinum is the best for longevity/life. Needs to be for the 08 2.0 turbo GXP. Anyone use iridium plugs?
 

·
Registered
Joined
·
731 Posts
I would use stock plugs.
 

·
Registered
Joined
·
1,148 Posts
Plug #1 is the one at the front of the engine. BTW, make sure there is nothing sitting around the coil pack to fall into the hole.
And, I believe, the stock plug is iridium; that's what I use in all my vehicles, vintage and new.
 

·
Registered
Joined
·
4,189 Posts
If you know how to change spark plugs, the coil pack sits right on top of it....one bolt, give it a gentle tug and off it comes. If you have never changed plugs, have someone that has there with you (if you're changing the plugs too). Otherwise the coil pack is probably the easiest thing you will ever do! You can easily re-thread the head if you don't get the plug back in correctly. re-thread = bad!
 

·
Registered
Joined
·
3,440 Posts
I wouldn't be in too much of a hurry to change the plug. I had a single incident a few years ago under hard acceleration where the car stumbled and threw the same code. Never had an issue before that time nor has it done it again since.

I'd wait for a bit before I changed anything.
 

·
Registered
Joined
·
61 Posts
And while you're at it - I'd recommend swapping coil packs 1 and 2. If the symptom comes back and says that you have a misfire on cylinder 2, then you'll know that it is a faulty coil pack.
 

·
Registered
Joined
·
2,721 Posts
Discussion Starter #13
And while you're at it - I'd recommend swapping coil packs 1 and 2. If the symptom comes back and says that you have a misfire on cylinder 2, then you'll know that it is a faulty coil pack.
Good idea.

Guys, I must be getting old because I just remembered that I switched out my spark plugs when I had my 2.4 Red Devil back a few years ago. I remember it was very easy. :lol: And I went with NGK Iridium spark plugs. They come pre gaped. I also remember that they ran very well and I had them in my car when I traded it in for my new GXP just last year. Never had any problems with them at all the entire 4 years I had the car. So I think I am going to use them again. :thumbs:
 

·
Registered
Joined
·
4,189 Posts
But you have a turbo car now, and they are extremely hard (and finicky) on plugs. The guys on the hptuner board said change the plugs every 2nd or 3rd oil change. I just did mine about a month ago....I went with the stock ac delco 41-408....
 

·
Registered
Joined
·
2,721 Posts
Discussion Starter #15 (Edited)
But you have a turbo car now, and they are extremely hard (and finicky) on plugs. The guys on the hptuner board said change the plugs every 2nd or 3rd oil change. I just did mine about a month ago....I went with the stock ac delco 41-408....
If the stock plugs are so great, then why am i having problems with them? Car only has 25k miles on it.

The stock plugs are made of platinum, which anyone will tell you are made for longevity/life, not performance. Since I used the NGK before and others have used these on their GXPs with no problems, I see no reason not to switch. DDM Works also sells these same plugs with their 2.4 ltr supercharger kit. They are a hotter/cooler running plug. There are NGK plugs for both egines, 2.0 and 2.4 cars. Once I use a product that works, I usually stick with it. They also come pre gaped which I like.
 

·
Registered
Joined
·
1,639 Posts
Do a forum search for spark plugs. A bunch of different types have been tried, but more often than not the stock AC Delco seem to work the best. Gap does make a difference. .032 seems to be the most common gap with the most success.
 

·
Registered
Joined
·
2,721 Posts
Discussion Starter #17 (Edited)
So the other night I had a misfire again and then a check engine code came on. P0301. Which was a misfire in cylinder #1. So I decided to pull the plugs and check them. WOW! They were all pretty bad. I replaced them with NGK Laser Cut Iridium OE plugs. The are recomended as OE replacement plugs for the Solstice GXP. The factory plugs are crap! Autolight plugs are around 2-$3 each. The NGK Iridium plugs are good because they are a hotter running plug, better for the turbo LNF-5. They cost around 9-$10 each. So basically you get what you pay for. After installing these plugs, the engine started right up with no hesitation. Rough idle is gone and car runs great! My boost went from 14-15psi to 16-17psi. I understand that the turbo 2.0 goes through plugs pretty fast, but after only 21k miles the durability of the stock plugs just doesn't last. Seems like Iridium and copper are best for high performance engines and turbos.
 

·
Registered
Joined
·
1,072 Posts
unless the head has a threaded metal insert cast into the head, NEVER take a spark plug out of a hot aluminum engine. :willy:
Bill
 

·
Registered
Joined
·
6,936 Posts
unless the head has a threaded metal insert cast into the head, NEVER take a spark plug out of a hot aluminum engine. :willy:
Bill
Well.....I've had to many times at the track with no issues, but probably a good rule. And never fail to install plugs in any alloy head with a dab of antiseize!
 

·
Registered
Joined
·
1,072 Posts
Well.....I've had to many times at the track with no issues, but probably a good rule. And never fail to install plugs in any alloy head with a dab of antiseize!
sometimes ya gotta do what you gotta do... but it only takes one time for the plug threads to start to seize and peel out the thread in the head.
:thumbs:
Bill
 
1 - 20 of 35 Posts
Top