SLT617
Member
- Joined
- Jan 18, 2016
- Posts
- 41
- Reaction score
- 1
- Ram Year
- 2011 1500, 2011 2500, 2016 3500
- Engine
- hemi 5.7
I was driving my truck on a road trip a week ago and on the tail end of my trip, I passed a semi going up a hill and my check engine light started flashing. Another hour or two it happened again and the light stayed on. I noticed a few times that it was running a little rough for a few but overall the truck runs completely fine. Ran codes and got a P0303 cylinder 3 misfire.
I seafoamed the gas tank and throttle body and later changed the spark plugs on cylinder 3. Also switched the coil pack from 1st and 3rd cylinder and still got the check engine light along with codes P0300 and C1242. I've been driving it for the past week and I notice that 95% of the time it still runs fine. Sometimes right when I start it up or go up hills the check engine light flashes for a bit andI'll feel a bit of a rough idle but it shortly goes away. I've driven it down the highway for a few long trips and it's acted totally fine, it's just that every once in a while I get this issue.
I took it to a mechanic and they said compression is fine so it must be something internal. I figured it would be a bad lifter/spring and cam anyway but he has to rip it apart in order to fully diagnose. He was saying he'd probably have to put in a new cam and all new lifters/springs/etc for just above $5500. Said we could also get a remanufactured engine in for about $7500.
My Ram has 122,000 miles on it so I'm already past warrantee. I bought it used a while back and the Ram dealer inspected it and said internals were all fine.
I found a used 5.7 hemi for $1,500 a few hours away from me so I might just buy that and get it installed in my truck. If it is just a lifter/spring, should I just have the mechanic replace for only that cylinder instead of everything? Is there something else I can do before getting it ripped apart?
I think I'm going to put in marvel mystery oil as a last ditch effort to fix it. I've changed the oil every 6-8k so I don't think it's gummed up inside. Should I put in a new CPS or TPS? I'd love to hear any other ideas. I'm going to get a second opinion from another mechanic next.
I seafoamed the gas tank and throttle body and later changed the spark plugs on cylinder 3. Also switched the coil pack from 1st and 3rd cylinder and still got the check engine light along with codes P0300 and C1242. I've been driving it for the past week and I notice that 95% of the time it still runs fine. Sometimes right when I start it up or go up hills the check engine light flashes for a bit andI'll feel a bit of a rough idle but it shortly goes away. I've driven it down the highway for a few long trips and it's acted totally fine, it's just that every once in a while I get this issue.
I took it to a mechanic and they said compression is fine so it must be something internal. I figured it would be a bad lifter/spring and cam anyway but he has to rip it apart in order to fully diagnose. He was saying he'd probably have to put in a new cam and all new lifters/springs/etc for just above $5500. Said we could also get a remanufactured engine in for about $7500.
My Ram has 122,000 miles on it so I'm already past warrantee. I bought it used a while back and the Ram dealer inspected it and said internals were all fine.
I found a used 5.7 hemi for $1,500 a few hours away from me so I might just buy that and get it installed in my truck. If it is just a lifter/spring, should I just have the mechanic replace for only that cylinder instead of everything? Is there something else I can do before getting it ripped apart?
I think I'm going to put in marvel mystery oil as a last ditch effort to fix it. I've changed the oil every 6-8k so I don't think it's gummed up inside. Should I put in a new CPS or TPS? I'd love to hear any other ideas. I'm going to get a second opinion from another mechanic next.