sr20det wont idle when i connect the vac. line to the recirculater valve.

[Spins]

95 blktop. I removed the exhaust manifold/turbo to replace the gasket between the manifold/turbo. I replaced the exh. manifold gasket also. Put everything back together no leaks but car wont idle. I of course had to remove the intake piping and hot pipe and recir. line to the intake tube and one vac. line to the wastegate act. that's it. If I remove the vac. line running to the rec.valve and plug it, the car runs perfect. Once connected it idles crappy and wants to die. With the vac. line on the valve at idle this opens the valve allowing the all ready metered air to pass back into the intake piping. This shouldn't cause a problem. I exchanged the rec. valve with a spare I had and same results. I checked the ecu. No codes found. I did remove the harness from the aav I believe it's called. This made no difference. Should this had made the engines idle changed? I unpluged the maf. The engine continued to run perfectly as long as the vac. to the rec. valve isnt connected. Any ideas.

[Spins]

No ideas? Some more info. on problem. When I drive the car with the rec. valve vac. removed but plugged. The car only will boost to around 8 psi. When it's connected it idles crappy buy boosts higher as normal. Is it possible the wastegates is stuck or something?

[Silvia007]

Sounds to me like both your BOV's are bad. If not, then you have your vacuum lines hooked up wrong, if you have an image of what you did or do a drawing of your vacuum line's and how they are setup and your piping routing. This would help us help you.

[Spins]

When I removed the turbo. I only unpluged one of the vac. lines. Which was the one running to the wastgate act. I have checked all vac. lines. They all look good. They arent very old I replaced most of them shortly after the swap. I'm running 1 vac line from an intake manifold nipple under the throttle body. This line has one t- fitting. supplying the rec. valve and the wastegate act. I'm running a 2nd vac. line from another nipple under the throttle body supplying the boost gauge. There are 2 other smaller nipples under the throttle body. I have these capped off. I'mrunning the stock s14 piping mated with an s13 intercooler. I have the port for the rec. valve on the s13 intercooler capped. I'm running the stock s14 rec. valve in the stock location for a s14. Venting the air back into the stock rubber intake just before the turbo but after the air flow meter. Both my rec. valves seem to be working the same way. Once the vac. line is attached. They both open fully allowing the air to rec. at idle. Once you step on the gas they close fully.

[nismostate]

check for piping leaks

[Spins]

Well I found the problem a few days ago. It was the installer error. Namely me. I made a mistake when putting the hard intake pipe onto the turbo housing. Is was causing a leak. So when the rec. valve was activiated this caused more of a leak and made the problem worse. So once I corrected the fitment issue I new my problems where over. Thanks for everything.