Persistent P0301 code on my pentastar

[CHUCK31979]

I had a P0303 2 years ago(120000 miles) on my 2014 ram 1500 3.6. So, I did a lot of repairs to take care of it; plugs, coils, injectors, oil cooler(since the intake was off, and every sensor that involved air/fuel/cooling even the ones under the intake. Jump forward to last week I get P0301. I replaced that plug and coil(same ones) and it's back but only off and on. This time my coolant temp is up 30 degrees 190-195 is normal, my oil temp is up 15-20 degrees 185-195 is normal depending on load. everything else is pretty normal. I was thinking maybe the head gasket but I haven't lost any power or signs of leaking. Any thoughts or ideas, PLEASE

 

[crash68]

Try swapping the coil and fuel injector with another cylinder. Also pop the valve cover and check if the rocker arms are moving like the rest, it's not just the Hemi that can lose a lifter/cam.
Get an exhaust gas test for the coolant, can rule out a head gasket or cracked head

 

[SitKneelBend]

I had a P0303 2 years ago(120000 miles) on my 2014 ram 1500 3.6. So, I did a lot of repairs to take care of it; plugs, coils, injectors, oil cooler(since the intake was off, and every sensor that involved air/fuel/cooling even the ones under the intake. Jump forward to last week I get P0301. I replaced that plug and coil(same ones) and it's back but only off and on. This time my coolant temp is up 30 degrees 190-195 is normal, my oil temp is up 15-20 degrees 185-195 is normal depending on load. everything else is pretty normal. I was thinking maybe the head gasket but I haven't lost any power or signs of leaking. Any thoughts or ideas, PLEASE

When I had these codes it was the injector going bad both times except mine was 2 and 4. If you have a multimeter I can post the dealer notes so you can see how they tested for it.

 

[SitKneelBend]

I had a P0303 2 years ago(120000 miles) on my 2014 ram 1500 3.6. So, I did a lot of repairs to take care of it; plugs, coils, injectors, oil cooler(since the intake was off, and every sensor that involved air/fuel/cooling even the ones under the intake. Jump forward to last week I get P0301. I replaced that plug and coil(same ones) and it's back but only off and on. This time my coolant temp is up 30 degrees 190-195 is normal, my oil temp is up 15-20 degrees 185-195 is normal depending on load. everything else is pretty normal. I was thinking maybe the head gasket but I haven't lost any power or signs of leaking. Any thoughts or ideas, PLEASE

Heres' what I'm referring to...

16 Ram Outdoorsman 1500 (3.6) Code P0303

Hi all. A few months ago code P0303 popped up on my scanner, followed by a rough idle. I changed spark plugs, coil packs, and ran fuel injector cleaner (sea foam) through it. All rough idling has stopped. But code p0303 seems to come and go, on and off. Should I change the injector? Is there a...

www.ramforum.com

 

[stenerson]

Hopefully it's an injector. If not you may need to do a cylinder leakdown test to see if the valves are seating properly.