How's it going everyone? I'm having a little bit of trouble and was wondering if someone was willing to hear me out. So I recently bought this car and it's my first turbo car. I've had a lot of Nissan's but never got the chance to turbo any of them. The car runs ok execpt for some minor issues that I'm hoping someone on the forum can help me out with. Here's what the car has:

Bluebird SR20DET
Top mount log manifold
T3T4 turbo
Front mount intercooler
3" downpipe
3" catback exhaust
HKS BOV
HKS Wastegate
JWT ECU
Boost gauge
Injectors are stock 370cc, and so is the MAF.
No boost controller

One issue is the car turning off when I come to a stop. Car starts up great and idles at about 1,000 but when I get on it and let off the rpm's drop down to 0 and shuts off. No bogging while driving or anything just turns off when the rpms drop. Has anyone else had this problem?

Second thing is the car is only boosting 4psi. I know that it doesn't have a boost controller but I thought the motors boost around 7psi from factory so why is it that it is boosting so little?

I've search online about both issues and haven't found much information. I know every set up is different so that's why I am hoping someone here can help. Any info will be greatly appriciated.

Usually the dying after hammering on it is a vaccum or alternator problem. Mine stopped doing that when I replaced the alternator. But i would think its vaccum related which could be why your only generating 4 lbs of boost. follow all the vaccum lines with a pressure gauge and see how much vaccum you have at each line. another thing is I'm not sure those engines came with T3T4's which might change the inlet and outlet from the turbo, changing the volumes of the chambers which could also reduce the boost. Check out the specs and consult some turbo sites that can do calculations for you depending on sizes and lengths of outlets inlets and lengths. I've never owned anything with forced induction either so sorry i cant be of more help.

The alternator is bad on my car but I never thought that it would cause the car to shut off after getting on it but it makes sense. I'll start my changing that first. Thanks for the input.