Spark plug Specialist!

jds97Wrangler

jds97Wrangler

Active Member
Joined
Oct 19, 2008
Location
Mccleansville, NC
I have a 2004 Dodge Durango with a 4.7, I put Denso TT plugs in about 6 months ago. Since then on two different occasions the plug in the #1 cylinder has burnt the tip off.

The first time it happen I thought maybe the injector on that cylinder was weak making the cylinder run lean. I replaced the injector and didn't have a problem for about 3 months.

Then about a month ago I started getting a Cylinder 1 misfire code, I'd reset it and then about 2 weeks later it comes back. Yesterday it just starts skipping and I pull the #1 plug and this is what find again.
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ai357.photobucket.com_albums_oo11_jdurant75_DSCF14491.jpg

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ai357.photobucket.com_albums_oo11_jdurant75_DSCF14481.jpg
 
snappy said:
Intake leak causing a lean condition???
Click to expand...

I forgot to meantion, for about a year now I have had a slow coolant leak I can't find, at least I think its a coolat leak. When ever the temp outside is above about 65-70 and I let it idle it will heat up. (I have never actuall let it boil the needle just goes up to about 3/4 the way to hot) I check the water level and it will be low. I've been leaning towards a bad head gasket but I can't find any water in my oil, coming out of my tail pipe and I don't have oil in my coolant. The other issue from november until Feb I never over heated and I never had to add coolant.

The vehicle runs perfect until it does this to the plug. I am beginning to wonder if my coolant problem and plug problem may related.
 
transman731 said:
can you get an inspection scope and look in the cylinder? if the valves are white it's the head gasket.
i have done a bunch of head gaskets on 4.7's, the only thing i ever see wrong is the aluminium heads are warped.
Click to expand...

I just did a cooling system preasure test and it held 20 psi for 10 minutes the pressure never dropped a bit.
 
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