I got a weird issue for the last few weeks. my car boosts up pretty slow. it will go to 15 pretty quick, then it slowly creeps up to 20, then to 25, then almost at redline it will go over 30. I boost leak checked to 25 psi and there is nothing, I checked all vac lines, all are good. tried different tunes, same bs. yesterday I did a few runs to datalog, and first run it only boosted to 24, after that it fixed itself and boosted how it should. today, back to the not working bs. I haven't got a clue whats going on. I need ideas.

 

Any codes?

 

nope nothing. car runs 100% other than that.

 

I've had similar issues but eventually I get a code. (Not a cel) just a banked code.

 

Sounds like possibly either a wg or wg solenoid issue. Try pinching off the line between the solenoid and wg actuator and see if boost comes up quickly. Just of course be very careful to not over boost. It should at least help narrow down the issue to or away from a mechanical wg issue.

 

Yup right on, after a few hours of trouble shooting and thank god I had wg solinoid from k04, it turns out it's a bad Zfr wg solinoid. Thanks for ur helps

 

And I got a fuel pressure regulator performance code just now apperently.

 

good to have boost again.