Oil on plugs?
Thread Starter
Racer
Joined: Oct 2012
Posts: 438
Likes: 52
From: Baltimore County, Maryland
Oil on plugs?
So I changed my spark plugs yesterday and noticed some residue on the pulled plugs. Looks like oil but smells like unburned fuel. Cant tell but the plugs don't look fouled to me. The response is much improved after the change, but my bumpy idle remains, it doesn't do it all the time and only in neutral, and does loop like its missing.
No codes that I know of.
No codes that I know of.
Last edited by BmoreRnsDeep; Jul 28, 2013 at 02:09 PM. Reason: added pictures
Le Mans Master
Joined: Jun 2002
Posts: 5,037
Likes: 847
From: Rotonda West, FL 2015 Z51 M7 3LT
Oldtimer
Don't know about the plugs, any codes being thrown? As for the pictures, there are threads for "how to" - use the advanced search feature of the forums. There are plenty of threads with the steps.
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
The plug tip and electrode look good. The threads don't look like a concern to me. The threads are not there to seal against the engine internals, they just allow you to torque the plug, the sealing area is near the end of the threads away from the electrode. Expect for them to look like this after long usage.
Racer
Joined: Jan 2013
Posts: 377
Likes: 0
From: Jasper Texas
St. Jude Donor '13
Oil fouled plugs that I've seen do have a shiny black residue. The only time that I've seen fuel on a plug was a carbureted motor unable to start, for example flooded. If the engine fires up, it'll be hard to see unburned fuel even if the cylinder misfires because that fuel is going to dissipate or evaporate.
IMO
IMO
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Melting Slicks
Joined: Nov 2008
Posts: 3,146
Likes: 203
From: Edmonton Alberta, Canada
They look great, but as mentioned by another reply, the gap looks way too large.