Sparkplugs burning white on one side of the car

yellowstang1994

New Member
Sep 9, 2004
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Hey guys, just got done putting on an oil separator on my car and for some reason it started misfiring really badly... it just happened to be one of them things that happened the same time I was doing something. I pulled all my plugs and changed my wires. The plugs are only 3 weeks old and i'm running Autolite 25 platinums. The car was running like a champ for a few weeks and then in the last week seemed to run like crap. All 4 plugs on the pass. side were running normal wear. However, all 4 plugs on my driver's side are all white looking... It's hard to get a good picture but this is the best I could do (1 plug in comparison with the other side)

View attachment 502259

After I changed everything the car isn't misfiring anymore and it runs great. I'm running maybee a **** hair or 2 over 10degrees timing so it couldn't be too advanced. And even if it were all the plugs would be white wouldn't they? Not just one side. The book says the white means it's running hot. The next thing i'm trying to figure out is, how could only one side of the engine be running hot. I'm thinking maybee the o2 sensor on that side is going bad? And it's sending a different mixture to that side???? Any ideas?
 
Check your fuel rails? Make sure that the feed line to the driver's side rail is working.

In my opinion, the fact that it started running poorly after you installed the separator would indicate a vacuum leak, but you say that this is not the case.
 
it's hard to see details in that pic.

What do you mean by "white" The whole electrode and ground wire or just the insolator?

I know if you have a slightly blown head gasket and burning coolant that would cause the plugs to look white.
 
Sorry, the pics were really hard to make out. I took a lot but those seemed to be the best ones, lol. By white I mean the whole electrode and ground wire. I'll check the fuel rail on that side tonight. Is there any easy way to do this? All I have to do is makesure the back is connected right? I was running regular copper autolite 25s for a while and they seemed to do alright. But before I switched over then I was running platinum Autolite 25s for a while and never had any problems. My car still slightly pings also with the new plugs in it but does not misfire.