Thread: Just changed the plugs on the Comp G.

I changed all the plugs in the car today. Went with Autolite Double Platinums

I had a misfire on #4 that resulted in an SES light. And the other day when I got the wastegate solenoid replaced, the mechanic said he saw 2 more misfires in #2 and #3.

When I took the old plugs out they all had a white film on them. #4 was the worst.(whitest)

I'm wondering what might be causing this and what I need to look for/fix.

Have a picture?

Here we go

OK. Well, I replaced the elbows, but I think one didn't go in good. And I know It barely seeps coolant out at idle. And the temp needle will go above halfway, for a few minutes and then come back down.

Other than that everything seems good. It runs so much smoother with these new plugs though. Big difference.

I'd recommend the iridiums over the double plats, but I'd guess you haven't swapped to an aluminum lower intake manifold gasket yet?

Hey Speedy,
I am the tech manager at Autolite. We have a video on our website on misfire diagnosis, here is a link-http://www.autolite.com/learn_more/autolite_challenge_videos.
You should be able to figure out what the cause is after you watch it. If I can help you with any troubleshooting instructions, let me know.

Originally Posted by Bio248

correct me if im wrong, but explain if i am right...

youre a tech manager for fram, autolite, and prestone? what?

Yes I am. I am the manager of technical training at Honeywell Consumer Products Group, Fram, Prestone, Autolite and Holts. (all Honeywell) I also do technical work for Bendix and Garret (also Honeywell companies). I manage a group of four guys who write articles, teach auto mechanics, produce technical video and answer questions on web forums.

Originally Posted by Bio248

makes sense. carry on. (good to know though so i dont think youre full of it)

He sent me two fram XG filters gratis.

Originally Posted by Bio248

makes sense. carry on. (good to know though so i dont think youre full of it)

I understand, just a humble auto mechanic who gets paid to help people with their cars. I love my job. The videos on the autolite site have one real good module for DIS ignitions that would be helpful to you guys. We are also running a promo open to all of you right now, watch a video once a month and get a 25$ gift card after watching all three. autolitechallenge.com/pro

how much did the s/c wastegate solenoid replacement cost you and where did you get it done? my 05 gtp gave me the code for it but i havent been able to find one for the car anywhere.

The solenoid and the bypass valve are 2 different parts.

I wanna say it was it cost me like $65ish with labor. The part was maybe $40. I let the guy at the shop do it because he did a rotate and balance for me as well. The complete total was like $89. I could have put it on, but I didn't mind giving him the business. Not sure where he got the part at though. Probably a dealer part?

i found the valve on ZZperformance but the wastegate solenoid is the little thing attached to it and i cant locate it anywhere on line, ill swap the valve myself and if it doesnt turn off my light ill hit the junk yard. thanks!