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Help Datsun will not run good after 4K 280z


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So I got this 77 280z it's got a 83 swap bought it few months ago here in San Diego. When I got it had head gasket blow would turn on but never drove it. I put a new gasket on and had the head checked and surfaced with the intake and exhaust manifold p&p 3angle here are the Mod or thing it has

 

List

Original ecu 83 turbo and AFM with a intake filter

Nissan t3/t4 turbo fat front monnt intercooler

Greddy blow off

Tial wategate 38 10psi Spring

Fuel rail 440 supra injectors

Fuel lab FPR at 36 psi at idle around 700 rpm

3in down pipe all the way back with hks hi power muffler

Aem Wideband

No power steering

No ac

No cold start injector

Plus all the vacuum line were disconnected just have autometer boost line from intake and brake booster vacuum the rest are blocked off

Msdbox

 

Can drive it fine around the block. will turn on rev well in neutral sound good and healthy. once I go over 4K stalls it fall in its face. I have an old autometer gauge it reads 7 psi at idle and will go up to 20 pounds when under load around 4K before it stalls. Will install a boost gauge with vacuum/boost maybe the old one is broke

Any suggestion thanks

Edited by Ser280z
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Do you mean to say that your car is producing boost at idle?

 

Also, I would suggest cleaning up your post a bit, as the lack of puncuation makes it quite confusing. This will make it difficult for the people to help you because they will not be able to clearly understand the issue.

 

Pillar

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