I got a 05 ram 1500 5.7 with a tuner in it the trucks idles fine in park and neutral but when put in drive or reverses it idels poor and it will drive fine sometimes but then sometimes it drive like it has dead cylinders ive put new plugs wire coils o2 sensors and still dose it can anyone point me into another area to lookin into thanks

 

whats the key jingle codes show?

 

When it frist started it was codes for multiple miss fires put new plugs wire an coils then i pulled the codes and it was still miss fire cleared it again then it was 8 codes for o2 sensor put new o2sensors in and cut the cats out. Then last night i pulles the codes again now it is misfire and o2 sensor and fuel to rich
Took the tune off it to see if it would make a difference but didnt was kinda thinking maybe a valve problem but dont hear nothing besides exhaust leak

 

What plugs did you put in?

 

Plugs are ngk

 

Copper?

 

Yes cooper

 

Exhaust leak might be a contributor.......

Disconnect the O2 sensors, and see if it runs any different.

 

I did unhook all the 02 sensor should of said that but it didnt make any different

 

What's fuel pressure look like? Have you tried swapping injectors on the cylinders that are misfiring, see if the miss moves with the injector?