So, i'm getting a code for my 99 Dodge Ram 1500 rwd 5.2L. It is a cylinder 8 misfire. When I use to fill allll the way up was when it sent it. Now it does it if i'm anywhere above 1/16th (i'm not kidding). I changed fuel infector and it seemed to work. But it's back to it's old ways. Any help? I have eliminated spark plugs and their wires b/c the misses seem to be related to amount of gas. HEEELLPP please!!

 

Pull plug #8 and post up photo. Also, remove TB and look inside intake. Bet there is oil pooling in there. Then go to the "End all be all plenum" thread in FAQ/DIY section. Order plate on e-bay - cheaper than Hughes.

 

I thought it was that (longshot). Yeah, my gen is known for those flimsy plenums. My truck buena oil and occasionally (like once every 3 or so Weeks) pings. So it definitely displays the common signs for the plenum and gaskets being warped. Happen to you?

 

Yep. Was that way when I got it along with blown tranny.

 

Will happen to all eventually. Design flaw. I'm just waiting for mine to give out. Luckily mine is just an occasional weekend hauler. I put maybe 100 miles a week on it.

 

Yep. I already did the tranny (rebuilt). I'll pull the spark plug probably tomorrow and figure out how to upload it for you.

 

I put about 40-50 on mine.....a day!! Lol. You are right though....IT WILL HAPPEN TO ALL!!

 

Fixing it is not as bad a job as you may think...once you get a broken intake bolt or two taken care of. Also replace the timing set with double roller chain (about $50) and water pump and tsat while you have these off anyway. You'll be money ahead and keep from going back for those things later.

A member here on DF sells the plenum plate on e-bay. Ooops. looks like he does not have anything available.

Try HERE.