Car Stalls Under Hard Acceleration

[Juarez88]

Hello everyone,

 

I recently purchased another 240z with an unusual engine combination and have discovered an issue that causes the car to stall under fairly hard acceleration (4-5k rpm). AS soon as I let off the throttle it ALMOST ALWAYS STALLS unless I blip the throttle and shift gears quickly. Sometimes I can start the car up after it stalls but occasionally it wont start up because it will not spark anymore UNLESS I unplug a connector to the ignitor and reconnect it.

 

I was told by a mechanic that it can be that I have a NON-FI fuel tank and I need a larger return line (75-76 280z fuel tank), and that my fuel pressure is really high (around 70). I would appreciate if anyone has any advice or has had a very similar issue.

 

One last and final thing. My car does not have a TPS because it has a 240sx throttle body, should I remove that and go with the stock throttle body so I can attach a TPS?

 

Here are the general specs:

 

Yes it is a NA l28 that has been turbo'd.

Engine:

- F54 Block

- Flat-top NA Pistions

- P79 Head

- Non-EGR N47 Intake Manifold

- 240sx 60mm Throttle Body

- Nissan T3 Turbo

- Front Mount Intercooler

- Greddy Type S BOV

- MSD Ignition

- Walbro 255lph Fuel Pump

- Complete 3†Custom Mandrel Bent Exhaust Piping

- Dynomax Super Turbo Muffler

- Manual Boost Controoler

- Stock ECU

- Electric Fan with Electronic Thermostat