I have 272 cams and I have never stalled. They were installed by RRE and the car was tuned by Doc Grey. You might want to have them check your car out.

 

same exact thing happens to me....mine drops low then sometimes stalls, its because of my bov though(well thats what i think at least)..

 

How far down did you crush it? Is the nipple touching the top of the can or what is hte gap? Crushing it can cause some idle issues.

 

Why not try your stock BOV?

 

If anyone checks out your car, I would take it to TT since they're fully versed in the XEDE (nothing against RRE). I'm sure Alfred and Chris can diagnose the problem for you.

 

Most people are afraid the bov will leak so they tighten it down more then is needed. I ran an 11.92 with the Type S and the small spring only in it. There is now way it was leaking at 23 psi, I now have a bigger turbo running 27psi and have the large spring in with 1/2 a turn on the screw. She drives great but as soon as I turn it down more then that it will stall with the ac on and even with the ac off I need the idle set at 1100 rpm to stay stable, I now have it idling great at 800 rpm.

 

I have the same exact problem described in the original post...

Problem occurs with HKS 272/272's. Occurs with a crushed 1G as well as a GReddy Type-S with 1 or 2 springs... with it tight or with it loose. All are set to recirc. Occured with UTEC, stock ECU, and with DynoFlash. Occured with and without the SMC methanol injection kit installed.

 

I used to have this EXACT problem with my 300zx TT... I had no idea what it was, but amazingly enough it went away completely. Hope it happens to you also!

 

ct9a gsr,

Exactly - Mine has occured with and without the Alky kit, with the SMART Xede, with Dynoflash, with uncrushed 1G BOV and with slightly crushed 1G BOV.

It is not that the idle is lumpy, in fact it is pretty stable regardless of the idle RPM set (800, 1000, 1100). It will idle at that set RPM fairly stable. The issue is in traffic when you have to give it gas and then let off quickly moving a few feet like at a long line at a stop sign for example. The rpm's drop down below the set idle and don't make it back up and stalls. Now ocasionally you can blip the throttle and they come back up and sometimes you have to blip it a couple times....while that is one solution it is kinda hard on hills etc. to hold in the clutch, brake,and keep reving the throttle. There has to be a reason for this and I believe it is all due to the cams but I also know a lot of people out there have cams and don;t have this problem.

I am desperately hoping that Shiv can help come up with a solution.

Thanks to everyone for your thoughts and help it is greatly appreciated.
-Doug

 

Anyone find out the issue? I just put 272/272's in my car, using Xede V390 map, with upgrade Walpro 255 fuel pump, adjustable cam gears. I am having the exact same problem. Almost stalling while sitting in traffic, going up a slight incline. Idles fine at 900 rpm, but in traffic I have to rev it to keep from stalling and only happens when I move up a couple of feet. Anything in the Xede maps to change?