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Hi all, new to the 4g63t world and I figured this would be the go-to section to ask questions. I am purchasing a vehicle running a 4g63t from an Evo 3. Apparently it was running wonderfully although untuned until parked up 2 years ago. It had been started regularly but not driven on the road. The motor and turbo (eBay spec GT3582 A/R .70 'Anti Surge' turbo) look, sound and seem generally healthy. The problem is that the car now makes no boost. The turbo spins and spools happily with no shaft play or funky noises, the motor revs happily but no boost gets to the motor. My thoughts are that there is an issue with the external wastegate or actuator, BOV or a serious boost leak. Would I be correct in assuming so?

Hey guys i just recently got my r34 manual converted. since i have had it back it has been running slugish (worse then my NA r34). so while driving it the boost gauge goes up in boost and you can hear the turbo spooling but it feels like i am not getting any boost at all! the part that seems weird is that it seemed to drive normal when cold? (felt like it had boost. i didnt test that to ghard though since the car was cold) any help would be much appreciated, thank you

Hi SAU, Having boost related issue with my BCNR33. Car is making no boost! Triple gauge is registering vacuum, needle moves from negative to 0kg/cm2. Car drives normally, no sputtering or misfiring. AFRs also reading normal. Acceleration feels normal up until 3500rpm or so where you can begin to feel the lack of grunt. No woosh sounds either, just the sound of the HKS mushrooms sucking air. Just a little background on the car: HKS2530s, 2.8, E85, VIPEC V88, ~20psi max boost, 4in Exhaust. Recently had front turbo oil feed replaced by mechanic due to the old one being cracked. Got car back from them on a Sat and it was boosting fine but felt a little underpowered. Didn't drive car again till Wed. This is when is stopped boosting all together. Didn't hear any bang/pop, didn't notice any smoke either. Currently waiting to hear back from mechanic. In the mean time have inspected piping on both hot and cold sides (also checked FMIC piping behind indicator grilles) for potential boost leak, however wasn't able to find anything loose or hissing. Doing a little research on these forums leads me to believe that it could be a blown turbo or a blocked/malfunctioning CAT. All of the posts regarding no boost and blown turbos usually are owners with ceramic wheel turbos, which mine aren't. With my limited mechanical knowledge and tools I've taken as much piping as I can to check the turbos. The front turbo looks okay? It spins freely and has no shaft play. Don't have the tools to check the rear turbo as I can't get that elbow looking thing off to inspect the wheel. I'm yet to inspect the CAT. Question: If one turbos blown will I be getting half the amount of full boost or just no boost at all? Question: What are the chances of the CAT causing the absence of boost? I assume it would have been the ceramic wheels dropping into them. But again, I'm certain I don't have ceramic wheels. Question: What do you reckon is causing no boost? Appreciate any and all help!

Yo! so yesterday my s2 R33 rb25det was working perfect never had an issue. i get in my car i go for a drive i go to hit boost and its struggling, it sounds like i have a bee r limiter but no power at all just making mad pops from the exhaust. the factory boost gauge shows its working but yeah no power and it struggles real bad. i have checked all the piping and lines. no leaks or splits. if anyone has gone through this or knows how to fix it please help. i just wannnaaaaa hit boost