Hey y'all,
i am running an 08 RDX, Flashpro, and CP-E intake. Mapped with flashpro + k&n map. The issue I am about to speak about has occurred off and on both before AND after I installed the intake.

It seems that sometimes when accelerating my car only makes partial boost. It usually will get hung up at around 50% or 75%. The strange thing is that this usually only happens after I have ran the car, and then sat idling (drive-thru, bank, picking someone up) for 5-10+ minutes. Restarting the car has seemed to solve the issue. I also don't seem to ever have this issue after a cold start, only seemed to occur after driving + sitting idle. I also am not throwing any codes.

Planning on getting the car e-tuned, so I'd like to get this figured out before then. I have heard of wastegate actuator/actuator bolt issues, and some other things. I must stress that this is an intermittent issue and that it doesn't seem like anything is permanently seized open or closed. Definite performance decrease when it does occur though.

 

I can only confirm this wouldn't be due to a worn bolt - that don't stop you from achieving full boost, it just impacts the ability to generate pressure at lower rpm. But, that doesn't rule out other possible issues with the actuator unit as a whole. Could also be an issue with the turbo wastegate not operating properly (the actuator/bolt that you normally read about on here is not related to the wastegate). If the wastegate is not performing consistently, there are a number of other possible causes (filters, sensors, etc). It's unfortunate there are no codes, because there are just so many possibilities and having a trouble code could at least point you in the right direction. Good luck

 

I've been out driving all day, no issues so far. Wondering if heat/humidity could have any impact? Been a lot of both in my area lately. Guess I'll just have to keep driving, maybe go through with the tune, see if it continues? As of today, she's making full boost, full power, no driveability issues and no codes. I was really trying to seal down any driveability issues before I pay someone to remote tune my ecu, I'd feel like an asshat if it started popping up again. It seems like a fluke thing, but i dont want to take chances with the overall complexity of these turbo systems. Thanks for the info

 

Not sure why type of filter is normally used on your intake, but if it's the oiled re-usable type (i.e. K&N), you may want to give it a once over and make sure it's not clogging up. Dust and moisture can choke out the filters to some extent. I would say it's unlikely, but who knows? It would only take a few minutes to check though. Since you have the flash-pro, I'd also recommend getting some data logs from when you're experiencing the issue and have your e-tuner review them before moving forward. A good tuner would be able to identify something that doesn't look right, even if it's not necessarily throwing a code.

 

I am running the dflow dry filter that came with the CPE intake. Also, I just fueled up, and pulling out of the gast station my car started to do it again. Over about 5 miles it slowly worked itself out until I was able to max out boost easily again. Correct me if I'm wrong here, but I'm pretty damn sure the problem has to be with my flashpro tune? I don't remember the car ever doing this before I used it. If this is the case, im guessing my tuner should be able to navigate/solve it. I don't want to right off mechanical issues just yet, but the temporary intermittent nature of the issue leads me to believe it may be ecu. Considering my car fully functions most of the time.

 

I guess that, or a vacuum leak, or faulty/sticky wastegate actuator. Those are really the only things that make sense to me, and a wg actuator issue would probably throw codes I would think.

 

It could be the way the tune responds to heat soak.

 

I assumed that the intake and tune were done at the same time, but if it didn't do this prior to the tune then just flash back to stock and try to re-create the issue. You won't hurt anything on stock tune plus intake - the car will adjust the fuel trims accordingly to make sure it stays in the safe range. If you can't re-create it on the stock turn, then you have good evidence that it's related to the software, and as you mentioned, the tuner should be able to correct it.