So I hooked up my ODBII scanner today to see why the engine light was on.
It seems number 8 spark plug is misfiring again which i though I had fixed with the tune up. I suppose not, I pull the plug and there is Oil on the spark plug I can't seem to remember if there was actual oil on the electrode or just the base of the plug. I do remember it on the threads however. So I put a new one in there and it seems that it was doing fine for about a day (stop, go) traffic) and I went and pulled it again. No oil on it, perhaps it burnt off I dunno. Are my seals bad, if they are which ones and how much would it cost me. Selling the truck is not an option I just got it and I love it.

Bosch Platinum + 4 spark plugs, I understand this is not the preferred spark plug for this vehicle but it still should fire shouldn't it?

98D 4X4 5.2L SLT

 

Well oil on the plug can mean several things
Blown head gasket
Cracked head.
Bad valve seats
ext...

Need to do a compression test to find out if it is leaking or not.

Nxt, Bosh will fire but the dang things are not for these trucks. The odds are very good that you will have issues with the truck running well with them.

Champion!!

 

I also put in an anti-fouler into the plug well. The cylinder still does not want to fire. Even if the oil is killing the spark plug it shouldn't after putting the anti-fouler in. Could it be that I have a problem with my fuel injector?


137k miles on this truck.

 

So I went to go pull the fuel injector rail and I'm not sure if I should take the rail off with the injector's on it or not. It seems that the injectors do not want to come up very easy off the engine what should I do?

 

why are you pulling injectors? before tearing it up is problem oil or fuel?

for oil - as suggested a compression ck - more likely a valve guide issue-

 

Just feel the injector with the engine in idle. You should feel a small vibration in the injector... I would strongly suggest that you perform a compression test to the entire engine.

My thoughts are:

1) Bad intake or exhaust valve (valve job).
2) Bad Oil/compression ring on #8 (Re-ring, rebuild engine).


# 7 and #8 are the two hardest to check because of their location. But in your case it must be done... I do not think you have a cracked head or blown head gasket as long as it's oil deposit on the new plugs.

With 130,000 miles on the engine, if it's a valave or ring then the rest of the engine is not far behind. I would suggest that instead of a quick fix valve replacement be done, you should consider pulling at least the whole head or both heads and send them to your local machine shop so they can clean them up and rebuild them for you.

Good luck and keep us posted on the findings of the c-test.

 

Stop thinking and pull those POS plugs out of that motor. Also, pull those anti-foulers.

Replace them with Champion Copper Plugs (OEM) or Champion Truck Plugs. Bosch will not work in our rigs and what you are looking at is prolly unburned fuel depositsand not oil.

The 5.9L and 5.2L will not work on Bosch or many other name brands!

 

Oil "ON" a plug and not evident on the tip is usually a leaking valve cover gasket. Check right above the lug in question. If you still have the metal cylinders that the plug goes down into, take a pair of pliers and pull off the one the oil was collecting into. They cause more troubles than they are worth... one of which is collecting oil from a leaking valve cover.

IndyDurango

 

Plugs again.

"IF" oil is making it into the cylinders that could be something different but good call Indy on the outside.

 

Chrysler engines run hotter then most other makes engines, that's why you can not use just any spark plug. Now you must determine if it is in fact oil or fuel on the plug. I assume it is not on the threads of the plug or that simply would be a faulty valve cover gasket.

If the engine is not firing due to oil leakeage it will show up in your compression test, if it is fuel/ignition related then you may want to have the truck scanned by a pro to ensure you do not have a ECM or ignition issue.

Regardless of what plug you install, it will or should spark. It will not last as long as the proper plugs and may misfire from time to time. I do not think the plug is the problem. Check the plug wire if you find it's un-spent fuel on the plug.