Troubleshooting Honda P1399 Code: Random Cylinder Misfire Detected

How to fix Honda P1399 Code: Random Cylinder Misfire Detected

[@reelturner]

dont stop what you're doing very informative

[@1776Freedomfighter-hb1lc]

Vtec solenoid would this also cause the issue? I soldered a new pressure switch connection going to the vtec and now I'm getting a po1399

[@BLACKSTALLION77]

My pilot is setting the P1399, and like cylinder 2,3,6 misfiring and I bought the best high end plugs and coils a year ago. I did clean the intake and egr and now I get these codes like 3 times a month because I clear the codes, so I'm thinking mines a injection issue..

[@ElGhostPresents]

Could it be possible for it to misfire for using 91 octane instead of 87? i drive a 98’ Honda Civic EX

[@mr.dc4l]

I have 2018 honda accord with a p2651 code.. I'm not finding anything for it...

[@definitionXrp]

If a mechanic is saying i need to adjust my valves for $865 are essentially trying to do the most expensive problem solve...but in reality its a different fix that is cheaper

[@JosephDR]

You can adjust them yourself. It's easy.

[@richardhelit844]

Air cleaner + map sensor

[@definitionXrp]

U think so? I'm having this code my engine is strong and running...engine light blinking just bought it off craigslist

[@lanenaklk]

I'm getting p1399 and p0303

[@stripecatflippangitnamecha8721]

Did you found out what was the problem with your car I have the same code appear

[@lanenaklk]

@@stripecatflippangitnamecha8721 no I have changed several parts I'm starting to think maybe the oxygen sensor is next if not the gas line my car is a little bit rusted so I might be due to that

[@stripecatflippangitnamecha8721]

@@lanenaklk I've been fixing my car too, planning to do compression test Saturday. I did everything too even gap the valve, let me know if you fixed your car I let you know too if I fixed mine.

[@stripecatflippangitnamecha8721]

@@lanenaklk Have you change the Distributor cap yet? I am done buying parts but not fixed the problem. I don't want to buy the Cap I just change it 2 years ago

[@lanenaklk]

@stripecatflippangitnamecha8721 I did and it help drive better