New Raptor - misfire detected - p0305, p0316

Hello everyone. Last week I traded in my 2019 Supercab Raptor for a 2020 Supercrew. I wanted the extra rear space as I have a 6 month old (along with some more creature comforts, the supercab was as bare a Raptor you can purchase). The dealer I purchased from was a 2 hour drive from me (local dealers didn’t have any). On the way home a little more than halfway the truck started to shake on the highway, the check engine light flashed. Once I pulled over it was still shaking pretty hard at idle. After talking with roadside assistance I decided to limp my way home (it was 9pm and only option they gave was towing to a dealer which would put me 1hr away from home and baby). The truck did behave the rest of the way home. Next day I took it in to local dealer. Who didn’t have any openings for 10days but did scan the codes for me. P0305 and P0316. The tech cleared the check engine light. I then took it to the next closest dealer about 30 miles away the following day (no misfire or any more issues). They sated they didn’t see anything in the data logs of a misfire or any other issues. I was relieved thinking this was a fluke event. However on the way home from this dealer it happened again. The purchasing dealer has gotten me a car from enterprise until I can have the original local dealer take a look this coming Friday. So my plan currently is to wait until then.

Video link:https://imgur.com/gallery/uiXM2Kp


My questions to this community are:
1) Are misfires relatively common/easily resolved?
2) How worried should I be about this being a lingering issue?
3) Should I be doing something different, as in demanding a return of this vehicle with the purchasing dealer? If so what are my options here?

Thank you for your help

I don't know what those codes mean, but I have seen them posted before, I think its going to be relatively easy, now that the codes are present the dealer will see them and diagnos properly. @FordTechOne might chime in and offer a better suggestion. Post a pic of your Raptor, we like that stuff.

Probable an easy fix--dont clear the codes this time!! Being this is your second instance of the same thing, I would be sure the dealer Replaces something!! I would not take the truck back until the most likely part has been replaced! Report back when they have looked at it----

Could be some bad gas. The dealers don't fill these trucks with premium when they fill it up for you. When I got my 2018 the truck did not like the gas they filled up with because it had a little bit of a rough idle, felt down on power. I filled it with premium and it was night and day how much better the truck ran

Sharkus29 said:

Could be some bad gas. The dealers don't fill these trucks with premium when they fill it up for you. When I got my 2018 the truck did not like the gas they filled up with because it had a little bit of a rough idle, felt down on power. I filled it with premium and it was night and day how much better the truck ran

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Agree, I had a similar experience. When the low fuel light came on for that first tank of "dealer gas" I filled up with 93, problem solved, big time!
V/R
Smokey

DTC P0305 is cylinder #5 misfire; P0316 is misfire detected within the first 1000 engine rotations following the engine being started.

Diagnostics should be focused on DTC P0305, since it indicates the specific cylinder that has been attributed to the misfire.

Misfires can be caused by 3 possible systems; base engine (valves sticking, low compression etc) which are typically consistent, or at least consistent with certain conditions present (temperature, load, engine RPM, etc). Fuel/spark misfires are the most common, and are typically caused by a faulty coil, injector, or poor electrical connection. Engine management related misfires are rare, but can be caused by everything from a damaged crankshaft position (CKP) tone ring or sensor to a faulty PCM.

With the symptom being both intermittent with DTCs and a loss of power/rough running, I would suspect it’s fuel/ignition related. As some others have mentioned, poor quality fuel can also cause these symptoms. It sounds like it occurs when the engine is fully warmed up after an extended drive; be sure to give the dealer as many details as possible regarding the conditions under which it occurs. If they just take it around the block, they’re not going to be able to duplicate it. Once they duplicate it and determine root cause through diagnosis, there is no need to worry about it being a long-term issue.

Happened to me on my 19. They ended up replacing coils, injectors, spark plugs and pretty much all electrical connections to the top of the engine. I dealt with that problem at about 1k miles. Took the dealer almost a month of repeat visits to find. Truck runs great now. 28k miles. All warrantied work.

Thank you all for the insight. I will most definitely report back hopefully after it’s been diagnosed and rectified this Friday.

FordTechOne said:

DTC P0305 is cylinder #5 misfire; P0316 is misfire detected within the first 1000 engine rotations following the engine being started.

Diagnostics should be focused on DTC P0305, since it indicates the specific cylinder that has been attributed to the misfire.

Misfires can be caused by 3 possible systems; base engine (valves sticking, low compression etc) which are typically consistent, or at least consistent with certain conditions present (temperature, load, engine RPM, etc). Fuel/spark misfires are the most common, and are typically caused by a faulty coil, injector, or poor electrical connection. Engine management related misfires are rare, but can be caused by everything from a damaged crankshaft position (CKP) tone ring or sensor to a faulty PCM.

With the symptom being both intermittent with DTCs and a loss of power/rough running, I would suspect it’s fuel/ignition related. As some others have mentioned, poor quality fuel can also cause these symptoms. It sounds like it occurs when the engine is fully warmed up after an extended drive; be sure to give the dealer as many details as possible regarding the conditions under which it occurs. If they just take it around the block, they’re not going to be able to duplicate it. Once they duplicate it and determine root cause through diagnosis, there is no need to worry about it being a long-term issue.

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Mang I see your relative new to the group. I have been watching this group for a while and FordTechOne only randomly responds in a positive manner, always posts good well thought out information, no BS. My guess FordTechOne is a well qualified Ford dealer mechanic or a Ford Factory engineer representative with good insight to clearing Ford problems and either option certinally being in the know. I always enjoy and carefully read FordTechOne's posts.

I know you won't but please don't forget to at post your trucks progress and final fix, that's whats always makes this site so interesting and helpful along with most of the other members helpful & cheerful input

Update: The second misfire also came back with code p0305. Cylinder 5 spark plug was found to have carbon tracking. They replaced it and I have since put 60 More miles on the truck. Cautiously optimistic this was the sole cause. Truck feels like it should. Thank you again to you all and especially FordTechOne for some great info.