Josh707

I also have a 2015 5.3, my truck has a dod delete, cam, dyno tuned, all lifters solid. So it's always v8. I did the cam and dod delete at 100,000 miles, I'm at 130,000 miles now. This started with a p2096 code with the same symptoms . Replaced cats, o2 sensors, spark plugs, did vaccum smoke test, still have similar symptoms as guy above, low power, sputtering. Seemed like every time i replaced something she ran good again for a couple days and then back to ******. I did find an exhaust leak from when I installed the cat . Fixed that, cleared the check engine light and managed to drive it almost a week without a check engine light, it even auto cleared the permanent p2096 code. Then today I got the engine light again with the same old P2096 as well as a new P0324. Knock sensor . At this point I'm nervous that I have a bad cam lobe and damaged lifter. Any thoughts?

I have a '15 silverado 5.3. I'm at roughly 130k and have several upgrades. About a month ago I experiences loss of power and struggle going up hills. I narrowed it down to bad cats and replaced the cats 3 weeks ago. After the replacement I regained the power and drivability instantly. Felt so good! Then it slowly got bad again. Not as bad as before, but far from right. It seems like everything I do fixes it slightly for a couple days and then back to spurstic symptoms. Cleaned air filter, did smoke test for vaccum leak, pulled spark plugs and ended up replacing them due to condition (newish only 30k on the bad spark plugs). Again after replacing them the truck ran great for two days. Now back to running like crap. The day I replaced the cats I had a couple engine codes pop up (all confirming it was the cats) . Did the cat sawp and cleared the codes. About a week later I got a single code again. A p2096, running lean. That code held through all my efforts until until replacing the spark plugs . Truck still runs bad but won't throw a code now . Injectors are semi new, 30k I'm thinking fuel pump maybe ?!?!