Hi I am currently a new member to the forum and was seeking some advice or help. I own an 04 Ram 1500 Hemi 4x4 with around 124k miles. I was driving home normally one day from work and truck started driving odd; dying at stoplights and stop signs, bogging down while accelerating from a stop or with a load, and the sound of a misfire. Popped a code for the IAT sensor so I cleaned it off and code went away and was replaced with an O2 sensor code. I proceed to change that also until yet another code popped for Cylinder 5 misfire. I went ahead and checked the sparkplug, which had fuel on it so I changed the fuel injector and all 18 sparkplugs cause they were worn also, runs a little better but still nothing changed. The misfire sound is on the opposite side of the engine where the flooded sparkplug was, so I thought it could be a plugged Cat cause back pressure on the valve, cat was clean so another option out. I checked the vacuum lines to look for a hole, took a pressure valve to the fuel rail and looked all good, took oHms readings of all coilpacks and EGR valve. Decided to bite the bullet and take it to a local shop to where they said it had a bad pushrod (on the misfire side) and that that was the only thing they found and that they never seen anything like this. I wanted my truck back to figure it out myself instead of blowing money on a shop that took too long before I need to go back to work. Today I unplugged an upstream O2 sensor and ran the truck to see if it would run worse and didn't change at all. So I changed out that one also. Yet again, truck runs a little better than before but still no solution to the problem. If you have any suggestions please comment where any advice is much appreciated.
Thank you
-KT

 

Do you actually HAVE a bent pushrod? If you do, need to find out why it bent..... If it's still in there, yes, it is going to cause a miss, you have a valve that won't be opening all the way.

 

Mechanic said it was "bent" but it wasn't actually bent. He changed it out and gave me the old one. Old one had a mushrooned top and while he was in there he checked all the valves with a mirror. Valves were all good