rb20 issue

[shawnfryedrift]

receentkly bought a r32 gtst from rivsu imports.
ran like s*** since i got it so i dont reccomend this importer.
replaced fuel pump with walbro and it runs slightly better. BUT it runs great at start up , boosts and pulls hard
about 5 min later it bogs. i hard wired fuel pump bypassing relay hoping it would help. it runs but once it starts bogging , i have to turn fuel pump off then back on for it to start pullkng hard again. as asoon as i turn fuekl off and back on it is fine for about 3 minutes, im stumped , any help appreciated

thanks
shawn

[Razi]

Your coolant temp sensor might be dead.
When they go bad, the ECU thinks the engine is always cold.

[shawnfryedrift]

If I let it sit it will eventually die and won't restart with fuel pump going until i switch fuel pump off then on. Fuel pump is on separate circuit