My 97 5.2 ram its running a weird and im getting a mis fire code all the time on cyl5the service engine light is always on and has started 2 blink every now then.The spark plug has oil on it.... all others are fine, can eny 1 give me advice??

Thanks Tom,

 

I think you valve cover gasket is leaking? Or you valve guide is leaking. As for the miss fire your spark plug is all fouled up with oil so that may be why you have the miss fire.

 

I bought the truck a year ago and I put new heads on it, now 23,000 miles later.Im gettingoil on the spark plug on the inside of the block, not were the wires snap on. When the misfire happens with the torqueconverter locket up whileim driving I can really feal itthrow the truck, tap the brake and it goes away.[/align][/align]im gnu take my valve cover off and check my valve stem seals today[/align]

 

On a 97 I bet the plenum is no good if it's never been replaced.A bad valve guide or seals can cause that too, but I bet plenum gasket.

 

And as far as the blinking CEL goes, check the cat.

 

I have already replaced the plenum gasket and I look down the throttle body and its clean. My cat was hollowed out years ago and never gave me eny problems. Im taking my valve cover off right now..

 

Bad ringswill get oil on plugs

Jeff

 

well my valve stem seal was not quite oncorrectly on theexhaust valve, however i was able to get it back in place. i orderednew valve stem seals be here tomorrow i put it back together took it for a ride and got 2 codes again cyl 5 misfire and multiple misfire. bummer[/align]

 

are you going to pull the heads to replace the seals or do the air pressure trick or the string in the cylinder trick ?

 

I've got kindof the same thing with my number three cylinder, cept the miss was caused by a bad wire. I just pull the plug 'bout once a month and spray it down with some carb 'n' choke and put her back in, runs like a champ! Eventually I'll get around to checking the rings but I'm saving up for a tranny right now, any suggestions...


AND I DONT WANT TO WAIT OVER A DAY FOR AN ANSWER!!!!!!!!!!!!!!!!!


Sorry couldn't help it!