Hi Guys,
I have a weird issue that I'm not able to diagnose. On my 2010 Ram 5.7L (90k miles) under load between 1,900 - 2,500 RPMs I can feel a slight to moderate misfire and seems to be getting worse . I've also notice my gas mileage is down from normal (about -3 miles per gal) . I have changed the plugs about 15,000 miles ago with autolite's Iridium and regular maintenance (Fluids and filter changes) have always been done on time. No codes are appearing at this point.

I keep wondering if I have a coil pack with a bad boot or something, but without a code, I'm kind of lost.

Any ideas would be appreciated.

 

Get rid of the iridium plugs. Stick with good 'ol copper.

 

I 2nd that... i tried the iridium and took them out 5,000 kms later,,,, stick with the factory NGK coppers,,,, they work the best

 

Interesting. Are the iridium plugs just junk?

 

For some, they work rather well. Just not in Dodge motors...... They just don't seem to like ANY of the rare-earth plugs..... they may be fine for a while, but, they break down and start causing problems LONG before standard copper plugs do. Which kinda blows the whole idea of spending three times as much on spark plugs, because they ostensibly last longer.......