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Old May 28, 2023 | 01:43 PM
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Default P300

Hello everyone I am French and in France not many garages want to take our f150 (there are not many in France) I had the code p300 and p304 I replaced the spark plugs, the problem persiststhen I had holes in the acceleration especially in the high rules I replaced the injectors today I have the code P300 what do you think? ignition coils or something? it's a f150 v8 201897000kmruns on 90% ethanol
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Old May 28, 2023 | 03:56 PM
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If your p304 is DTC code P0304 then


Swap cylinder 4 ignition coil with another cylinder and see if the misfire code changes to that cylinder.
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Old May 28, 2023 | 04:07 PM
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Originally Posted by Home2#7
If your p304 is DTC code P0304 then


Swap cylinder 4 ignition coil with another cylinder and see if the misfire code changes to that cylinder.
exactlysince the change of injector I no longer have p304 on the other hand I have p300 (random miss)
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Old May 28, 2023 | 04:12 PM
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OK


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Old May 28, 2023 | 04:23 PM
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Originally Posted by Home2#7
OK

new spark plugsnew injectorsI need to find the fuel filter to replace it. and if the P300 fault is still present I will look at the EGR side
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Old May 28, 2023 | 06:23 PM
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I think the fuel filter is part of the fuel pump unit inside of tank, not a separate filter but part of the pump inlet.
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Old May 28, 2023 | 08:19 PM
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The fuel filter is inside the fuel tank and is considered suitable for use for the life of the fuel pump assembly.
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Old May 29, 2023 | 02:11 AM
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[QUOTE=52merc;7430364]Le filtre à carburant se trouve à l'intérieur du réservoir de carburant et est considéré comme adapté à une utilisation pendant toute la durée de vie de l'ensemble de pompe à carburant.[/QUOTE
]I searched between the tank and the engine but couldn't find anything.

except a "black box" just after the tank, do you know what this box is?


For my P300 problem I will therefore look at the EGR,
do you have a plan or drawing of this system, and where is it located?
1 system or 1 on each side?

thanks in advance
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Old May 29, 2023 | 04:00 AM
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The code 300 is telling there was random misfires for a long enough period of time on >more< than one cylinder. "the random meaning".
Code 304 is the first/front cylinder on the driver side.
Can be a coil - boot, moisture in the plug well, faulty spark plug or even cylinder mechanics.
When resetting a coil in place, use the dielectric grease on boot tip and just inside. This is to help the boot find the plug tip you cannot see but only feel when the boot set's down in place with a 'light' hand feel, as you twist the coil to help it onto the plug tip.
The code 300 will clear if the 304 code is fixed and the PCM is re-booted.
I would not go to other areas looking for 'something'. Always a chance of introducing an additional issue causing real confusion from doing parts swaps.
Service for only the code you have unless others show up, then a wider diagnostic view needs to be considered.
After service, re-boot the PCM. The codes will clear unless a/the fault is still present after a drive cycle completes the 8 self diagnostic PIDS it normally does..
.
Next thing is the 90% ETH fuel is a big question!. No more than 85% unless you have some import model that is specs to run that concentration
Here in US the max is 85% and the supplied fuel usually is not much over 80%.
If your really using 90%, your running on the edge of issues from that high a concentration and the ability of the injectors to meter in correct A/F ratios that might cause misfires that also needs more fuel under turbo boost conditions. The injectors may not flow enough for the fuel your using.
90% would not even allow starting in low wintertime temps, here.
The BTU content is much lower, it is harder to ignite as the temperature goes lower so there is some gasoline in the mix plus additives to be sure the engine will start.
Refer to your owner manual page 175 on fueling.
Diesels use glow plugs to get started in cold temps.
Good luck.

Last edited by Bluegrass; May 29, 2023 at 04:03 AM.
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Old May 29, 2023 | 05:16 AM
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Originally Posted by Bluegrass
Le code 300 indique qu'il y a eu des ratés aléatoires pendant une période suffisamment longue sur >plus< d'un cylindre. "le sens aléatoire".
Le code 304 est le premier cylindre/cylindre avant côté conducteur.
Peut être une bobine - botte, de l'humidité dans le puits de bougie, une bougie d'allumage défectueuse ou même une mécanique de cylindre.
Lors de la remise en place d'une bobine, utilisez la graisse diélectrique sur la pointe de la botte et juste à l'intérieur. C'est pour aider la botte à trouver la pointe de la prise que vous ne pouvez pas voir mais que vous ne ressentez que lorsque l'ensemble de botte est en place avec une sensation de main "légère", lorsque vous tournez la bobine pour l'aider sur la pointe de la prise.
Le code 300 s'effacera si le code 304 est corrigé et que le PCM est redémarré.
Je n'irais pas dans d'autres régions à la recherche de « quelque chose ». Toujours une chance d'introduire un problème supplémentaire causant une réelle confusion en faisant des échanges de pièces.
Service uniquement pour le code que vous avez à moins que d'autres ne se présentent, alors une vue de diagnostic plus large doit être envisagée.
Après le service, redémarrez le PCM. Les codes s'effaceront à moins qu'un/le défaut ne soit toujours présent après qu'un cycle de conduite ait terminé les 8 PIDS d'auto-diagnostic qu'il fait normalement..
.
La prochaine chose est que le carburant ETH à 90% est une grande question !. Pas plus de 85 %, sauf si vous disposez d'un modèle d'importation conçu pour exécuter cette concentration.
Aux États-Unis, le maximum est de 85 % et le carburant fourni ne dépasse généralement pas 80 %.
Si vous utilisez vraiment 90%, vous êtes à la limite des problèmes de cette concentration élevée et de la capacité des injecteurs à mesurer des rapports A / F corrects qui pourraient provoquer des ratés qui nécessitent également plus de carburant dans des conditions de suralimentation. Les injecteurs peuvent ne pas s'écouler suffisamment pour le carburant que vous utilisez.
90% ne permettraient même pas de démarrer dans des températures hivernales basses, ici.
La teneur en BTU est beaucoup plus faible, il est plus difficile de s'enflammer à mesure que la température baisse, il y a donc de l'essence dans le mélange plus des additifs pour être sûr que le moteur démarre.
Reportez-vous à la page 175 de votre manuel du propriétaire pour le ravitaillement en carburant.
Les diesels utilisent des bougies de préchauffage pour démarrer par temps froid.
Bonne chance.
Good morning,
we misunderstood each other

at first I had code P300 and P304 I replaced the spark plugs
then the injectors
today I only have the code P300

in France we have E85 (i.e. maximum 85% ethanol)
I regularly use E85 and sometimes SP98 or SP95 (about 10% of the time)

I will check the correct positioning of the coils

but i would like to check the EGR
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