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  1. The Tuned CivicX Experience & Reliability Thread (for all models)

    okay good to know! So definitely it ain’t my fuel pump causing the misfire then. So hopefully changing the spark plugs does the trick. I changed the coil packs car was driving amazing the last two days then the misfire came back last night. So hopefully I can be good from here on out and...
  2. The Tuned CivicX Experience & Reliability Thread (for all models)

    Yeah I thought that was really weird as well, but I'm getting no codes even when connecting through the laptop. Even after the engine lost full power twice, there was still no codes. I'll keep monitoring, see if anything comes up. But right now, seems like something def going on with c4 (even...
  3. The Tuned CivicX Experience & Reliability Thread (for all models)

    As I mentioned in your thread, the logs really didn't pinpoint an issue. What I don't understand is getting a flashing CEL and no stored misfire code(s).
  4. The Tuned CivicX Experience & Reliability Thread (for all models)

    ...too early of RPM, but been fine otherwise Problems/issues: Zero issues up until this week when I got a check engine light P0303 (Cylinder 3 Misfire) turned out that I just needed new spark plugs and now car is running back to normal. Driving style: Like I stole it. Atleast 5 WOT pulls a day...
  5. The Tuned CivicX Experience & Reliability Thread (for all models)

    ...the headgasket but it’s not the case. It’s my COIL PACKS! A shop I trust here as my last resort ran the snap on machine to it. Went to some misfire detection option and was reving it up and found a misfire in cylinder 2 and 3. My spark plugs are good and gapped to 0.30. So the issue is indeed...
  6. The Tuned CivicX Experience & Reliability Thread (for all models)

    What’s sup everyone. I’m having this issue with my car on WOT 3rd to 6th above 2k RPM. The car seems to misfire, bog, back fire out the exhaust like crazy. To a point I can barely give it gas that point. Now my emissions came on and I saw the code on hondata picture below. 3 weeks ago I put...
  7. The Tuned CivicX Experience & Reliability Thread (for all models)

    ...Do NOT use octane booster. Octane boosters have corrosive additives like MMT which cause spark plug and injector problems. Knock Count / Misfires: Knock Count in ktuner correlates with misfire events. Knock counts are not always actually knock counts. It is normal to see knock counts and...
  8. The Tuned CivicX Experience & Reliability Thread (for all models)

    In an effort to try to keep an eye on tuned 10th gen issues, I saw elsewhere that @Luv_alan was able to fix the misfire issue with new injectors. Glad it was a quick fix.
  9. The Tuned CivicX Experience & Reliability Thread (for all models)

    ...numbers of each one, but the bad injector resulted to be number 3 instead of 4. Either way, it solved the problem and I do not have anymore misfires or power looses. I am thankfull with you, other way it will be get the car to a shop in order to check the engine (valves, headgasket, etc) and...
  10. The Tuned CivicX Experience & Reliability Thread (for all models)

    ...inlet, PRL intercooler, 27Won intake Problems/issues: When I got the car it had a lightweight clutch/flywheel installed which would trip the misfire monitor during shifts which killed drivability, switching to a heavier ACT clutch resolved that completely. Broken 3rd gear (on track), these...
  11. The Tuned CivicX Experience & Reliability Thread (for all models)

    ...note Problems, I have gone thru one oem cmc now onto my second wilwoodxclutchmasters cmc first one lasted a year before completely failing, misfire codes at start up caused by worn down camshafts replacing with oem intake and exhaust cam as hondata will only sell there intake cam with there...
  12. The Tuned CivicX Experience & Reliability Thread (for all models)

    Vehicle: 2018 Civic Si | Coupe Total tuned time: Some time in 2022, but I don't remember when Tuned miles driven: bought at 28K miles | 45k miles with Ktuned 23psi map | Currently at 70k miles on Phearable 1.5R - non-revision Tuning device(s) used: KTuner V2 Tunes used: Ktuner base map...
  13. The Tuned CivicX Experience & Reliability Thread (for all models)

    Let's talk about all those misfire codes first. Here's what a 10th gen pro has to say as far as diagnosing them: "Misfires and You" by Derek Robinson a.k.a. How to diagnose your P0300 (301, 302, 303, 304) codes. Plugs, coils, injectors, valve lash, head gasket, ringland. Those, in that order...
  14. The Tuned CivicX Experience & Reliability Thread (for all models)

    Gives me hope for my civic😢 Quick question how did you get the CRV Cvt tramission installed was it hard? And any other complications after installing it it honestly amazes me that you got that in the civic!
  15. The Tuned CivicX Experience & Reliability Thread (for all models)

    ...knew my head gasket is starting to fail like so many other 10th gens. Caught it really early, so none of the other mature telltale signs like misfire/knock/sputtering/etc. I knew the risks when modifying my car to this extent, running 29psi and E50. The TSP ARP Studs I installed one at a time...
  16. The Tuned CivicX Experience & Reliability Thread (for all models)

    ...of warm, that's something that will elevate Honda's knock control. Multiple pulls will tend to do that. Remember if you were getting real misfire and bad engine knock you'd be getting a check engine light. Every time you did a pull and went above 5,000 rpm, knock control rose up. In one...
  17. The Tuned CivicX Experience & Reliability Thread (for all models)

    Update: Vehicle: 2020 Civic Si Total tuned time: 9 months Tuned miles driven: 15k Tuning device(s) used: KTuner V2 Tunes used: Phearable 1.5; Phearable's 1.5R tune; revised 1.5R tune for fbo, currently on 5th revision for 91OCT custom tune by JV, soon for E. Fuel used: 93/91+1.5gal E85...
  18. The Tuned CivicX Experience & Reliability Thread (for all models)

    ...2 22lb Clutch Kit, Koyorad Radiator, ARP Head Studs (Hayabusa), RV6 Red BB Turbocharger, Accord fuel System. Problems/issues: Injectors started to misfire slightly, replaced with Axion Accord system. Fixed! Driving style: Zoom. Tuning experience notes: Being busy with a full time career sucks.
  19. The Tuned CivicX Experience & Reliability Thread (for all models)

    ...update, they are pulling the head to do a valve clearance check. More codes appeared, basically consisting of evap codes and cylinder 2 and 3 misfire. Waiting to hear back from the results of that issue. Also having them fix the radar cruise sensor since it is only 422 bucks, and I miss having CC
  20. The Tuned CivicX Experience & Reliability Thread (for all models)

    ...car), but I replaced all of my plugs with NGK Laser Iridiums and noticed better throttle response and low end torque. Oh, and the crippling misfire it started was resolved! Driving style: 90% interstate commuting/grandma driving, hard 3-4th gear pulls when I have the room Tune experience...


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