At idle between 17-22 in/hg is normal on these cars with stock cams and can vary depending on a health of motor. You can expect lower vacuum readings with bigger cams.
When you did the BLT, were you able to hear any other leaks spraying with soapy water? im not exactly sure on the clicking noise you mention

Phantom DSM said:

At idle between 17-22 in/hg is normal on these cars with stock cams and can vary depending on a health of motor. You can expect lower vacuum readings with bigger cams.
When you did the BLT, were you able to hear any other leaks spraying with soapy water? im not exactly sure on the clicking noise you mention

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So 16 shouldn't be a problem? And yes I have found two leaks with soapy water one of them was fixed while the other one was the BISS screw, not fixed note these leaks sprung up around 5psi and I stopped it. The clicking was coming from the back of the motor, from the throttle body/ intake manifold area

16 is a bit low, but it depends on age/condition of motor. Have you verified mechanical timing?
Regarding death after letting off throttle: are you recirc'd and what flywheel?

I'm recirc'd with a fidanza 8lb but never had it die off the throttle even after a hard run, so I doubt flywheel has anything to do with it but it's a variable.

horizontalkev said:

The clicking was coming from the back of the motor, from the throttle body/ intake manifold area

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The clicking might be a malfunctioning ISC, which would explain the stalling after a WOT pull. Look up the correct way to test the ISC using a multimeter.

Your vacuum does depend on the engine health, but your specific cam profile, altitude, vacuum leaks, etc will also play a role. But 16in isn't out of the ordinary, most stock engines run between 15-20in. With stock G cams up here at 6,000ft I was only getting 12-13 on a freshly built engine.

horizontalkev said:

So 16 shouldn't be a problem? And yes I have found two leaks with soapy water one of them was fixed while the other one was the BISS screw, not fixed note these leaks sprung up around 5psi and I stopped it. The clicking was coming from the back of the motor, from the throttle body/ intake manifold area

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Depends on your elevation but it looks fine to me.

Biss o-ring..

EXTREME PSI : Your #1 Source for In Stock Performance Parts

It has a rebuilt 6 bolt motor with approximately 30,000 miles and I'd say its in good health. Is the Android app "Torque" accurate enough to look at timing?

And Wes, I was told my isc might be going out before because of the idle issue and the strange clicking noise but the isc would cause erratic idling aswell right? That's what throws me off.. I will test it tomorrow

And thanks for the o-ring link, better than filling it with silicon and calling it a day Btw I live in Kansas where the elevations around like 1500-2000ft above sea level... I think

Lastly, check out this video I made while revving the motor and wideband readings, maybe this could possibly shed some light on my dying issue? I'm relatively new to the turbo scene
https://www.youtube.com/watch?v=h4Ag9ZdQN6U&feature=youtube_gdata_player

WB reading looks fine when revving. If you are worried about it reading full lean when you let off, thats completely normal. When you let off the gas while cruising or downshifting or whatever, fuel is cut. Thats normal for deceleration of any engine. It will lean on decel


edit instead of new post: Your vac is well within spec. Its fine. A touch low but no big deal. Now when you go with some 272 cams then you'll be seeing around 11-12 vac.

boost97gst said:

WB reading looks fine when revving. If you are worried about it reading full lean when you let off, thats completely normal. When you let off the gas while cruising or downshifting or whatever, fuel is cut. Thats normal for deceleration of any engine. It will lean on decel

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Okay awesome, just making sure. I don't wanna break her thanks for all of your help guys

the local vatozone or auto parts store will have o-ring kits for five bucks and you get multiple rings of that size and much more for later.

Its funny how many guys I have to explain that since we are at mile high altitude we dont have same idle readings as everyone else. at idle i run around 14-16 at best.. erradic idle IS what you are getting.. its not always apparent until there are strong variables thrown at it.

I'm about same altitude and I'm running 18-19 vac at idle