s14 KA-T no boost!!!

[240s_are_the_best]

I finally went turbo and now that i have it really close to being done. i have to either get/have a turbo back exhaust made. but i made a boost leak tester and got the leaks fixed. when i started it up i drove it to a friends house literally 1 min. down the road and no boost. i got it up to 5k and no boost at all. i have a t3/t4 topmount ebay turbo with Garrett bearings, a FMIC, 8:1 FMU, 4 psi wastegate spring untill i get it going right, and BKR7E plugs gaped to .32. would it not having an exhaust keep it from boosting? i can hear the turbo spooling but no boost. i have the gauge hooked up to the fpr line.

[Romeo_rus]

BOV stuck open?

[Elbowblk]

could also be an exhaust leak from the block to the manifold or a leak from the manifold to the turbo. happened to me.

[fo0manchu]

my vote is for a leak in your charge pipes. Hoses all clamped down properly? happened to me the first time I had mine on the road. Forgot to clamp down one of the hoses and the pipe popped off slightly. Still ran amazingly, but no boost.

[240s_are_the_best]

my vote is for a leak in your charge pipes. Hoses all clamped down properly? happened to me the first time I had mine on the road. Forgot to clamp down one of the hoses and the pipe popped off slightly. Still ran amazingly, but no boost.

I am pretty sure that is not it because i done a boost leak test and i can build up enough pressure to open up the BOV. which takes quite a bit of pressure. correct?

[240s_are_the_best]

could also be an exhaust leak from the block to the manifold or a leak from the manifold to the turbo. happened to me.

I have an frsports manifold that has a little threaded fitting on the back. would that keep it from boosting? still thinking it could be because it doesnt have an exhaust. but i dont know.

[fo0manchu]

I am pretty sure that is not it because i done a boost leak test and i can build up enough pressure to open up the BOV. which takes quite a bit of pressure. correct?

Well, BOV's don't work off pressure. They open with vacuum, and close as vacuum decreases. If pressure builds, it is completely closed. When did you do the boost leak test? Before this all happened or after. I pipe or hose could have popped off like at 1psi. Not having an exhaust wouldn't effect you not building boost. Perhaps your wastegate is stuck open??

[240s_are_the_best]

Well, BOV's don't work off pressure. They open with vacuum, and close as vacuum decreases. If pressure builds, it is completely closed. When did you do the boost leak test? Before this all happened or after. I pipe or hose could have popped off like at 1psi. Not having an exhaust wouldn't effect you not building boost. Perhaps your wastegate is stuck open??

the other day. it has never seen boost. i got the turbo put on and drove it and no boost. when i did the leak test one of the injector seals had blown out and was leaking pretty badly. i fixed that, drove it, still no boost. waste gate is closed. i can feel the valve shut completely as i dont have a dump tupe until i get the exhaust

[Romeo_rus]

Yes, that tubular mani has an EGR fitting on the back IS IT CLOSED?WHAT Turbo do you have? does it have an internal wastegate hole on the back? IS IT SHUT?

[biggie]

At this point pics and/or vids are going to help.

[Elbowblk]

yeah what he said. if that fitting on the manifold isnt sealed then thats the reason you cant get boost.

[240s_are_the_best]

Yes, that tubular mani has an EGR fitting on the back IS IT CLOSED?WHAT Turbo do you have? does it have an internal wastegate hole on the back? IS IT SHUT?

okay. i thought that could be it but it is only like a 1/8 NPT hole, i didnt think it would cause that much of a difference. but i will block it off and try it.

[Elbowblk]

yeah its lowering the pressure in the manifold when its leaking thus not spooling your turbo optimally. after its plugged you should be A okay

[240s_are_the_best]

okay. i plugged that hole and done another leak test and i can go up to 20 psi no problem with the air compressor. i am only going to run 5-8 psi because my internals are stock and have 210000 miles on them. so i know it can hold the pressure i am running i pulled the bov off to eliminate that factor and still no luck. i am stumped..... (yes the boost gauge works because when i do a leak test it reads the pressure i am putting to it. that idea just popped in my head.)

[Romeo_rus]

You said that you don't have exhaust...I asked do you have internal or external wastegate? If it is external, does your turbo have an internal wastegate hole???http://www.skylinesaustralia.c...3.JPGThat turbo has a hole for internal wastegate.. DID YOU PLUG THAT ONE WITH A FLANGE???

[fo0manchu]

You said that you don't have exhaust...I asked do you have internal or external wastegate? If it is external, does your turbo have an internal wastegate hole???http://www.skylinesaustralia.c...3.JPGThat turbo has a hole for internal wastegate.. DID YOU PLUG THAT ONE WITH A FLANGE???

Good point!

[WDRacing]

Even with a huge exhaust leak the turbo should still spool some. If the charge pipes were disconnected it wouldn't run. OR atleast it would run like crap and probably not rev past 2500.

Not having an exhaust is NOT going to stop the turbo from spooling. If anything it will spool faster because there is zero back pressure. Drag cars run a 4" dump right to the ground in some cases and they boost 40+ psi sometimes.

Pull the intake pipe and filter off. Check the compressor wheel for freedom of movement. It should spin with little to no force applied. Install the intake and filter assembly and MAF again. Start the car. Open the hood, rev the motor via throttle by hand. Listen for the turbo to spool and the BOV to open. Place your hand over the BOV when you rev it up and release. You should feel air rush out of the BOV upon throttle release.

Honestly this sounds simple to me. Sounds like the boost gauge isn't hooked up or the line is kinked...lol.

Can you snap some pics for us?

[240s_are_the_best]

You said that you don't have exhaust...I asked do you have internal or external wastegate? If it is external, does your turbo have an internal wastegate hole???http://www.skylinesaustralia.c...3.JPGThat turbo has a hole for internal wastegate.. DID YOU PLUG THAT ONE WITH A FLANGE???

YES I DID. I have a flange bolted on it

[240s_are_the_best]

Even with a huge exhaust leak the turbo should still spool some. If the charge pipes were disconnected it wouldn't run. OR atleast it would run like crap and probably not rev past 2500.

Not having an exhaust is NOT going to stop the turbo from spooling. If anything it will spool faster because there is zero back pressure. Drag cars run a 4" dump right to the ground in some cases and they boost 40+ psi sometimes.

Pull the intake pipe and filter off. Check the compressor wheel for freedom of movement. It should spin with little to no force applied. Install the intake and filter assembly and MAF again. Start the car. Open the hood, rev the motor via throttle by hand. Listen for the turbo to spool and the BOV to open. Place your hand over the BOV when you rev it up and release. You should feel air rush out of the BOV upon throttle release.

Honestly this sounds simple to me. Sounds like the boost gauge isn't hooked up or the line is kinked...lol.

Can you snap some pics for us?

honestly i dont think the bov is opening. but i will put it back on and try it. oh and could it be a cracked head gasket because my cooling system is building up pressure and opening up the pressure release cap and pushing my coolant into the overflow. and when i do the boost leak test i can hear air leaking from between the intake manifold. i recently replaced the upper and lower intake gaskets.

[fo0manchu]

honestly i dont think the bov is opening. but i will put it back on and try it. oh and could it be a cracked head gasket because my cooling system is building up pressure and opening up the pressure release cap and pushing my coolant into the overflow. and when i do the boost leak test i can hear air leaking from between the intake manifold. i recently replaced the upper and lower intake gaskets.

if you have air leaking between the manifolds, then yes.. YOU have a boost leak. I thought you said you did a boost leak test and everything was fine???

Check the gaskets again, make sure nothing is stuck in between them. Did you get all the old gasket material off? Tighten down the nuts properly?

Did you bleed your cooling system properly?

[240s_are_the_best]

yes i did and it was a really really faint leak but it was a loose intake bolt. took it for a drive and took it easy through 3rd and stomped it and BOOST! but still not great but it is getting better. apparently i pulled a line off lastnight and didnt put it back so it has a really small leak. but the stock clutch is glazed and will not grab when i stomp it. so i just ordered a hg, 11lb flywheel, and XTD stage 1 HD clutch. but that thing is AWESOME!!!! my oil pressure gauge line rubbed against my firewall and busted so i have a few major oil leaks. that oil pressure gauge line, it is leaking around my oil return on the pan. and my t for the oil feed, oil pressure gauge and sending unit is dripping a little. I cant wait to get the FMU and sway bars installed! and what should i start the gap at on my NGK BRK7E V-Power plugs?
Modified by 240s_are_the_best at 8:02 PM 1/15/2010

[zerepdivad]

I cant wait to get the FMU and sway bars installed!

Modified by 240s_are_the_best at 8:02 PM 1/15/2010

Man if you have no fmu or any fuel management be glad you aren't building boost! wait until you have everything then drive the car. It sounds like you're rushing to drive it, and it's not even done.