Hello to all im new here and i just got a 84 300zx turbo. So to make a long story short, The turbo doesn't hold any pressure, At lower rpm's it kind of jumps and surges. Thank you for all your help.

 

the turbo doesnt hold any pressure..... mhmmm..... (calm down refuse to tear into new guy breathe breathe.... 1....2.....3...... 456788912309234 GARHH!!!!)

lol jk but honestly the turbo CREATES pressure the hot side plumbing HOLDS pressure. so now on the boost guage it shows its not creating any boost? if so then the car would surge and run like ****... but this is a very vague explanation... are you car savvy at all?

 

surges on the Z31 turbo and NA are often caused by a bad Mass airflow sensor. (MAS)

...or boost leaks. I'd suspect boost leaks

 

w00t! Welcome to ZDriver... and to the Z31!

 

check all of the vacuum lines and piping from the MAF back, as well as all clamps and make sure everything is nice secure and in good shape. second you might want to give your car a tune up, even if they said they had one done. (cap, rotor, plugs, wires, fluids, oil change...etc) if everything i mentioned checks out good, then you can start diagnosing the electrical stuff. (simple things first right?) and welcome to the z31 party.

 

Well thank you for all your helps guys. Well i'm new to the z, it took over my soul and i will learn more in time. Just on some cars i know really well but this is like a new sight that im looking into. And i think the first post was right it was that the hot side plumbing is not holding any pressure. I'll get back with pics and youtube vids of it so you can see it for your self. But im Hard at work so much i'll try to get those in asap. But thanks alot guys i'll be back.