i have the 5.2 i have checked the o2 sensors nothing wrong with them checked the map sensor the plenum seems to be fine changed the plugs and wires the cat was gutted after this happened it wasnt the issue im running out of ideas as to what it can be it throws about 20 codes when i plug it in but there never the same codes

 

need info on your truck...year model etc..

 

its a 99 dodge ram 1500

 

Sounds like your PCM is going bonkers. Did you disconnect battery when changing stuff? Even if you did, disconnect battery then cut your headlights on to drain the system. Then reconnect and see what happens.

If it's still going crazy it's time to start to tracing grounds

 

the battery was out of it for a month and its still acting up

 

Time for a compression/leakdown test.

 

I'm lost. Besides throwing codes, what is acting up?

 

it backfires when at idle and has a major loss of power it takes a full mile to hit 60

 

Backfiring out the exhaust, or intake?

 

do a compression test.