2015 1500 5.7 Hemi..... p0308 & p2099

[Lifted2wd]

lol, we had the same thought. Added that the second you posted, so yeah I concur.

I'm going to and see what it does

 

[Lifted2wd]

Still reading p0308

 

[Burla]

So now only reading P0308? No other codes? And running shaky? The usual suspect here is the cam/lifters. I wouldn't be doing any long trips til it is fixed.

 

[Lifted2wd]

So now only reading P0308? No other codes? And running shaky? The usual suspect here is the cam/lifters. I wouldn't be doing any long trips til it is fixed.

It doesn't shake all the time under 2-3k then evens out but not constant

 

[Musky Mike]

Just pull the valve cover and see if the rocker arms on number 8 are going up and down.

 

[GTyankee]

Have you tried switching the #8 coil, with the coil next to it & then run the code check again

I did not read thoroughly & may have missed a sentence or phrase
..............................................
A code P0308 may mean that one or more of the following has happened:
list starts with most likely down to less frequent

Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer

If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs).
Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule.
I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs).
In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Read more at: https://www.obd-codes.com/p0308
Copyright OBD-Codes.com

 

[Lifted2wd]

Have you tried switching the #8 coil, with the coil next to it & then run the code check again

I did not read thoroughly & may have missed a sentence or phrase
..............................................
A code P0308 may mean that one or more of the following has happened:
list starts with most likely down to less frequent

Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer

If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs).
Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule.
I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs).
In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Read more at: https://www.obd-codes.com/p0308
Copyright OBD-Codes.com

New coil pack, spark plugs and injectors. The p2099 went away. I need to check the o2 sensor. I did a % chart on alfaobd for on sensor 1/1 and 2/1 but chart did not produce any results

 

[Bill McCauley]

I would replace #8 sparkplug if you haven't changed it after the new injector. It may have fouled. I had that happen beforr.

 

[scubasteege]

Man I know this isn’t what you want to hear but I had air fuel mixture code and a bad cylinder 3 misfire above 2500 rpm. My lifter was destroyed and ate my cam up really bad. Cost me 4500 at the dealer to fix because that’s a little outside my expertise. Been 20k miles since the cam and lifter replacement and she runs amazing now! 145k total miles now. Cam and lifters bad at 125k

 

[BrianNS]

Hey guys. Need help

Just did new plugs and a coil pack for #8. Still getting these codes.


What am I missing

OBD plug in

 

[GTyankee]

Don't toss parts at your Ram, use tools that you have or you can rent from stores like autozone, to determine which parts are good & which may be bad

Autozone & other stores will use their scan tools on your vehicle, all you have to do is ask
Just tell them that you have a trouble light & would like to know what it means
Sometimes they will give you a print out
This is one time that you want to act like you don't know anything, so that you get the clearest answers
.............................................................
If you have a Infrared thermometer

 

[Lifted2wd]

Not tossing parts. I use alfaobd to diagnose the issue which was the misfire p0308. Replaced all plugs. Did not remedy. Replaced coil and injector. Helped immensely still an issue. Not as bad tho.

 

[Burla]

IMO you did it right.

The only thing you could have done different is swap injectors, but that is kinda of a pain because you need to remove the rail to get to them, and all that does is save you an injector cost. That second code is what tripped you up a bit, but you settled it. Now we are looking at a cam lob, seriously don't go on long trips until you deal with that.

I look at what was posted on what causes misfires in posts above, and they omit lifters, lmao. The number one reason for misfire in a ram.


this.. huh

A code P0308 may mean that one or more of the following has happened:
list starts with most likely down to less frequent

Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer

 

[Lifted2wd]

IMO you did it right.

The only thing you could have done different is swap injectors, but that is kinda of a pain because you need to remove the rail to get to them, and all that does is save you an injector cost. That second code is what tripped you up a bit, but you settled it. Now we are looking at a cam lob, seriously don't go on long trips until you deal with that.

I look at what was posted on what causes misfires in posts above, and they omit lifters, lmao. The number one reason for misfire in a ram.


this.. huh

A code P0308 may mean that one or more of the following has happened:
list starts with most likely down to less frequent

Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer

I did do the injector on #8. Crazy thing is I replaced one set of lifters a year ago because they were bad. But the issue was completely different [symtpoms] so now I think its cam shaft and I really don't want to deal w a shop

 

[RedSRT4Me]

I did do the injector on #8. Crazy thing is I replaced one set of lifters a year ago because they were bad. But the issue was completely different [symtpoms] so now I think its cam shaft and I really don't want to deal w a shop

Trade it in for a TRX

 

[Burla]

I did do the injector on #8. Crazy thing is I replaced one set of lifters a year ago because they were bad. But the issue was completely different [symtpoms] so now I think its cam shaft and I really don't want to deal w a shop

have you seen the dyi cam thread?

 

[Lifted2wd]

Trade it in for a TRX

God I wish but this is my work truck

 

[Lifted2wd]

have you seen the dyi cam thread?

I have not

 

[Burla]

I have not

cam bible thread around here. Pay attention to rods, the number one issue on the board is rods and/or timing. I can't say as (knock wood) I haven't attempted it yet. However, if my cam goes I will attempt it using this thread as a guide.

 

[Lifted2wd]

cam bible thread around here. Pay attention to rods, the number one issue on the board is rods and/or timing. I can't say as (knock wood) I haven't attempted it yet. However, if my cam goes I will attempt it using this thread as a guide.

****. Thank you