marcs23

I have an EK civic with a B20/vtec swap. I have running on 11psi and have the hondata S300 v3 and it just got tuned last month. Starting yesterday, I noticed the sound of the turbo spooling was different. then I noticed that it is taking me a lot longer to get up to 11 psi. I had to get to almost 7k rpm to reach 11 psi when normally I am at 11 psi around 4000 rpm. and obviously I do not hear my HKS BOV unless I am high in the rpms. I am thinking it is either the turbo or the wastegate. I checked all of the pipes and vacuum lines and everything looks good. Anyone have any ideas how I can check to see if the issue is the turbo or the wastegate? thanks

boostjunkie757

hows the fluid in the reservoir for your clutch look?



if it looks like any shade other than the somewhat clear or color of the reservoir, that could be the issue..

boostjunkie757

im sorry, i was assuming its a manual trans set-up...i should have asked first..




it isnt an automatic is it?

marcs23

no, it's a 5-speed. Not sure what the color of my clutch fluid would have to do with the boost.?????

wantboost

iTrader: (2)

if the fluid is dark it indicates a problem... mostly that it's been overheated, signs of a slipping clutch

wantboost

iTrader: (2)

you could have damaged the turbo, check it.
you also need to check for vacuum/boost leaks

if the s300 isn't throwing a cel then I doubt it's an ecu problem

turbohatch96y7

iTrader: (15)

Or maybe........... An exhaust leak??

Or maybe......... A bad wastegate???

Or maybe.......... Boost controller???

Or maybe..........

marcs23

I checked boost controller and for a vacuum leak. all good. When I do hit 11psi, it holds perfect like it always did. It is just that it takes way to long to get to the 11 psi. I am thinking the wastgate or turbo. I will check the turbo for shaft play but how would I check the wastegate?

wunfstgsr

$5 says your HKS bov is leaking..

boostjunkie757

basically, these types of issues are very difficult to resolve over the internet..



my best suggestion: find someone who knows a LOT about cars that lives near you, and become good friends with said person. then you have someone to teach you what you need to know.

2000CTRSi

Pressure test the charging system. Search google for boost leak test.

Check your t3 exhaust gasket. Probably blown out. Use a metal one.

F22Master

Exhaust leak

TheShodan

iTrader: (14)

I'm also thinking exhaust leak somewhere.. possibly a lost exhaust
Turbine flange bolt. Destroyed turbine flange gasket.

A boost leak tester would make sense if he never made the 11psi to begin with

boostjunkie757

if it were an exhaust leak that was bad enough to describe the lack of boost he is referring to he should be hearing some pretty noticeable noise from that..

scottdh20

build a boost leak tester.

go to home depot

grab a pvc end cap the size of your turbo inlet.

buy a jb weld

buy air hose fitting

drill hole in the endcap the size of the air hose fitting. scuff up around the hole well. apply jb weld to the fitting and screw in. apply generous amount of jbweld around fitting...and wait 24 hours...

pull off intake and clamp on the tester...get the air compressor up to 20lbs or so...hook onto fitting....listen for a leak

wantboost

iTrader: (2)

Not necessarily... I blew almost 95% of the manifold-turbine inlet gasket out on my SR20DET and at idle you couldn't hear a thing but it wouldn't build full pressure and was super laggy.. only when the pre-turbine backpressure was high enough while I was driving could you hear the exhaust leak.

you need to build a boost leak tester like stated above, you can't just look at the engine and go "no leaks"

the quickest and cheapest way is to let the engine idle and spray every piping coupler and place where there's a gasket with brake cleaner... if there's a leak the the engine vacuum at idle will suck the brake cleaner into the intake tract and cause the rpm to fluctuate up and down enough where you can hear the exhaust note change.

scottdh20

I once had a torn coupler...it took 7 or 8psi before the crack would open, you couldn't seen or feel the cut until then either

boostjunkie757

the reason i say so is because any time that exhaust gases are exiting the set-up in a manner that was not initially intended, it should make some noise...ive noticed similar noises coming from the turbo flange trapezoid shaped gasket, as well as exhaust manifold gaskets & the downpipe if it hadnt been tightened down enough..

but if others have actually experienced those types of leaks without ANY noise, im sorry, but because id never experienced it myself, i would have a hard time believing it until someone i personally know not to be completely full of **** vouched on it.

boostjunkie757

that is something i hadnt thought of...id never had that happen but that would explain it..



it would also explain it if there were no really noticeable noises as well...because that probably would be a noise that would be tricky to discern, being it is in the charge-pipe set-up that possibly could sound similar to the turbo spooling or wastegate dumping..

marcs23

this is not my daily driver. I took it out today and it only does it once in a while. I step on the gas and it won't boost more than a pound or two. then once I get higher in the rpms it will get to 11 psi but it only does it once in a while. most of the time I hit 11 psi by 4 k rpm. this is making me think the waste gate is sticking. I do not hear any difference in the exhaust. in a 30 minute ride, it did this like 4 times. most of the time it boosted normal. it there anyway to check the waste gate? I would think if there was a boost leak somewhere it would do it all of the time. thanks everyone