car wont go pass 4000 rpm

[streetstyleauto]

car wont go pass 4000 rpm when moving and at idle.i just installed the greddy ic pipes and greddy type s blow off valve before this happend.also when it reaches 4000 rpm the wideband reads 10.0,i checked all the clamps and they are good.i also have a log at idle.

for some reason when it was at idle it did what i was telling you guys but then when i took it for a spin it was fine i still poste the logs 1st =idle 2nd=cruise 3rd=wot

 

[doctor_shock10]

boost leak test thats what it sounds like.

 

[Bentley05]

Check bov setting?

 

[98mitsubishigst]

It's def a boost leak.. Just because you phyically tightened them "all" down; Doesn't mean you missed a spot... Buy/make a boost leak tester and check

 

[anthony1]

Make Your Own Boost Leak Tester -

YouTube - Mighty Car Mods - Make Your Own Boost Leak Tester (SE01 EP17)

Can buy a metal version (as mentioned, shown in above videoclip) -

http://www.siliconeintakes.com/index...28f1db6cd22d42

How to build an Pipe Pressure Leak Tester
Parts Needed:

A 4 inch long piece of 2.5" O.D. (outside diameter) hose. (I used some radiator hose I got at NAPA)
1.5" I.D. (inside diameter) PVC end cap.
2 band clamps that will fit around the 2.5" pipe above.
A valve stem (I used the rubber type you press in)

Note that if you have a larger turbo, the sizes of the end cap and hose may need to be larger in order to fit the turbo inlet.
To assemble, just put everything together as shown.

http://www.vfaq.com/proj-pics/IC/tester/PTesterAngle.jpg

http://www.vfaq.com/proj-pics/IC/tester/PTesterSide.jpg


To use it, just remove the intake pipe from your turbocharger inlet, and attach this in its' place.

Now you need to hook something up to the valve stem to pressurize the intake so you can listen for leaks. I use a 7 gallon air tank I got from Walmart, I just fill it up with air at the local gas station. You can also use a simple bike pump.

If you have a manual boost controller hooked up, you might want to plug off its' intake hose, as they leak a lot of air, making it hard to pinpoint the real leak.

Pressurize the system, and listen all over for leaks. Make sure you or a friend listens under the bumper too, wherever there is IC piping.

A leak will be obvious, they make a loud hissing sound.

You might want to have a friend check out your boost gauge while you are pressurizing things, to make sure you don't put too much pressure on things. (20 psi should be safe, or whatever you run safely for boost)

Places I have heard of leaks occuring:

BOV flange
Intake manifold ports
Throttle Body gaskets
Holes in the intercooler
Holes in the intercooler piping (sometimes the rubber pipe inside the stock woven mesh pipes cracks, and you can't see it from the outside... the pressure tester will find it though!! )

Also note that you can attach this to either the turbo inlet or the throttle body to detect leaks in the head.

*Thanks huge to VFAQ Site - Visual Frequently Answered Questions for all the info.*