Honda F12x Big Turbo Lag

[Boost-A-Holic]

SWEET LORD what is wrong with this honda?????? dont worry bro your just that much closer to finding out what it is. At this point id say take your intake piping off as well as the intake manifold and look for something physical obstructing airflow or maybe even stuck in your manifold. I had a shop instal my IC and they forgot to remove one of the seals and it got sucked into my manifold and caught on a runner. I couldnt rev past 6k. I hope thats not it but at this point its better safe than sorry.

[NOIDEA]

Thanks Boost. I just checked the waste gate again now it opens and closes without any problems. Removed the fuel pressure regulator, by the looks of it, it seems to be fine. I’ll have to start and eliminate 1 thing at a time so I might as well start with the IC and intake manifold. It is basically winter in S.A now so I’ll have a lot of time to work on the ski. What do you guys think of the plugs do they look lean? Another thing is when it wouldn’t go past 4k rpm and I remove the pipe from the waste gate I don’t get an over boost warning. I must say when she is running fine and I remove the pipe from the waste gate the acceleration is amazing for 5 seconds till you get the over boost warning!!!!!!

[JoeyDFZS]

Those plugs look better than the last pics of your plugs......they don't look that lean now

[JoeyDFZS]

Check fuel injectors.....that's tricky maybe. Is bad

[thegasman34]

Did you get your ski sorted i have the same problem and think its the waste gate solenoid sticking not allowing the turbo to boost

[NOIDEA]

Did you get your ski sorted i have the same problem and think its the waste gate solenoid sticking not allowing the turbo to boost

Spot on that is the problem. The wastgate doesn’t close properly. It open and closes just fine but doesn’t close all the way. I just added an extra spring to close it all the way.

[dude269]

Do you know what size spring you used? Like length and tension. I tried a random spring and it throws an overboost.

[dude269]

Problem solved!!! After 2 years of troubleshooting, 4 engine pulls, multiple broken things and parts swapping. Drum roll. It’s the exact thing Brian from JI said The turbo exhaust housing. The shaft penetrated the housing through a bushing. The issue is that when the system gets hot the bushing swells causing the shaft to stick in the open position momentarily causing a turbo lag. Get yourself a reman housing from Brian and you’ll have your power back like new.

[Cdj632]

Problem solved!!! After 2 years of troubleshooting, 4 engine pulls, multiple broken things and parts swapping. Drum roll. It’s the exact thing Brian from JI said The turbo exhaust housing. The shaft penetrated the housing through a bushing. The issue is that when the system gets hot the bushing swells causing the shaft to stick in the open position momentarily causing a turbo lag. Get yourself a reman housing from Brian and you’ll have your power back like new.

Hoping to bring this back to life, sounds like I’m having the same issues. Can you give me some more information about Brian from JI? I can’t find a way to contact him.