car stalls under boost

[MistaScott]

If I try to punch it even a little and I build boost, my car stalls. Need ideas...recently adjusted minimum idle pretty low...could that be causing it? MAF sensor?

tps @ 0.425 idle, 4.3 WOT
stock chip
no aftermarket tach, so hard to tell my RPMs. idle appears to be as low as 500. I was stalling from cold start when I tried to put her in drive and go.

 

[jastrckl]

first things I'd check out are maf, wires/plugs (gap at .035, use CR43TS or so), and coilpack/module. why do you have the idle so low? shoot for more like 700. idling as low as 500 could actually be bad, lower oil pressure.

 

[humberto]

Make sure fuel pressure is ok.

 

[MistaScott]

I am hearing air bleeding off from somewhere then I get a rattle in my air filter. Where could it be losing boost? turbo hoses?

 

[humberto]

Turn the car off and pressurize the system you should be able to find leak.Or start car and pinch hoses with needle nose pliers until noise goes away.

 

[MistaScott]

Think I found the problem -- appears to be a crack in the rubber of the PCV inlet?? right before the turbo. It is that curvy pipe that goes from the intake to the passenger side head....not sure of the name.

 

[MistaScott]

Well that wasn't it. I am bleeding boost from somewhere between the turbo and the engine.... turbo spools but it the boost isnt reaching the engine.... get a loud rattle in the air filter after the boost has bled off..

any help is appreciated...

 

[MistaScott]

It was vac lines. Along with an IAC cleaning and throttle body cleaning now she's boosting better than ever