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Discussion Starter · #1 ·
Hello,

So i been dealing with this low pressure fuel drop for about a month i have tried everything to correct the issue. The car’s performance is very low, constantly back firing (misfiring), & going into limp mode. In tank fuel pump has never been tampered with. Wondering if anyone has been having this issue also on the new 2021’s 2.0. The next steps im going to take perhaps are replacing the high pressure fuel pump & do the fuel line mod hoping that will alleviate the problem. But if anyone has had this issue and had it corrected please feel free to share it.
 

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2019 2.0 EXL
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Sorry Eddie, I haven't dealt with that 🤞 Hope you are able to diagnose fix it cheaply!
 

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I have checked my vin number for any recalls regarding the fuel pump nothing as of yet.
May still want to have dealer look at it. Don't see anything in your signature as to what year your car is but if it's still under warranty it's on them to determine the cause. If it's out of warranty and still stock (no tuner or other mods they could blame it on) you may want to contact Honda Customer Care and file a claim.
 

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Discussion Starter · #6 ·
Still under warranty & heavily modified 😂 so im under the impression that they will blame kt on something.
 

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You could return it to stock tune, roll the dice and take it to them to check. Another thought is return it to stock tune, reset code and drive it for a while to see if it will throw the same code again. I would think if it's running stock tune and still throws the code then it wouldn't be related to tuner/tune. :unsure:
 

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Discussion Starter · #8 ·
I had my tuner (Derek) do a courtesy data log check for the ones i provided him. Tune is good everything is up to standard he mentioned just the DIFP drops to 2300 which is considered very low. So i have a fuel pressure ⛽ problem but to know where is a hard guess. Im going to roll the dice if after the spark plugs get changed the problem consist. Just incase the spark plugs are causing a misfire leading to fuel cut off.
 

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Also found this post you may want to take a look at it and the following posts from that member in the thread,
 

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2018 Accord Sport 2.0T 6MT
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You stated you're "heavily modified" what exactly have you done with the car?
 

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You stated you're "heavily modified" what exactly have you done with the car?
Not speaking for @eddie c but when he spoke of his car being heavily modified I searched to see if he'd posted what he had done to it and found this post from almost 2 years ago (Feb. '20) probably more has been done since...
So i have finally completed my bolt ons
All suspension related components coming up next ill be updating my build as i go.

So far heres the list of things i have done
PRL FRONT PIPE
PRL DOWNPIPE
PRL STAGE 1 INTAKE
TAKEDA INTAKE
PRL INTERCOOLER
BOOMBA RACING BOV
HONDATA
CUSTOM EXHAUST
HASPORT TORQUE MOUNT 62A
MAGNAPACK MUFFLERS
PTP TURBO BLANKET
MISHIMOTO HEAT REFLECTIVE TAPE
IG: BOOSTEDXACCORD
 

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2018 Accord Sport 2.0T 6MT
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Nothing on that list to me looking like anything that would exhaust the capabilities of a factory pump. Like @RnS 2.0T asked, have you run e85? That could degrade your lines and give you fuel pressure issues.
 

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2018 Accord Sport 2.0T 6MT
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@Fired00d fuel line degradation is real with flex fuel. Hope OP responds, I'm curious if he's been using it. If not I'd be looking at testing the pressure sensor first before getting into anything else.
 

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@Fired00d fuel line degradation is real with flex fuel. Hope OP responds, I'm curious if he's been using it. If not I'd be looking at testing the pressure sensor first before getting into anything else.
Sounds like the complications outweigh the benefits of using it with current fuel lines (and other fuel related parts) at this time. IMO until the flex fuel kits come with upgraded parts to compensate for the degradation of the parts that are now affected, I would stay away from using it.
 

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Sounds like the complications outweigh the benefits of using it with current fuel lines (and other fuel related parts) at this time. IMO until the flex fuel kits come with upgraded parts to compensate for the degradation of the parts that are now affected, I would stay away from using it.
Yeah, it's appealing but without a good line kit fuel issues are inevitable. I know PRL was researching new lines to be added to their kits but I haven't seen anything new about their findings.
 

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Discussion Starter · #19 · (Edited)
Sorry for the late response guys that mod list was from my other car that got T boned lol. Anywho i am running the flex fuel kit. I have been running it for about a year now never had any issues until this past month. I upgrade my flex fuel kit lines to see if it would alleviate the problem but it was still a no go. I been debating or not to cut open the lines that came with the flex fuel kit originally for any discrepancies in terms of the line degrading. The guy who i bought the lines from fk8td sent me the wrong ones in terms of length so i had to work with it re routing it. Just an FYI don’t buy from him i hate to talk bad about him but he’s an *******, poor customer service, and rude. Im not the only person who had an issue with him a buddie of mine said the same thing about him & instead of him owning up to his error he wanted me to remove them, clean them, and still pay for the shipping to exchange them. Ridiculous in my opinion for a error that he committed. Preferably if i were you guys wanting to upgrade the lines hit up JSR RACING they also carry them.
Motor vehicle Automotive design Automotive exterior Auto part Gas
 

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Discussion Starter · #20 · (Edited)
Another update: After i installed the lines i started getting a buzzing sound feedback whenever its idling or on throttle. Been looking to see where its coming from but no luck i can only hear it inside the cabin but can’t seem to quite find it in the engine bay. But in my guesses i think its the hpfp I’ll try to post the video of the sound on this thread so you guys can hear it once i figure out how on my phone
Automotive fuel system Motor vehicle Hood Automotive design Car
 

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