Rb25 Swap Complete! (PIC) Issue keeping the car running - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

opponheimer · 02-19-2009, 04:18 AM

i finally got my car together, manifold/turbo/full exhaust is on the car... the car still starts up, then shuts off.. Its getting fuel pressure i believe... had no issues with pump 3 weeks ago when it had a ka24de.after a while of sitting this is what happens:
1. turn key, car starts, tach goes to like 3k (uncalibrated) and shuts off after 2 seconds.
2. try to start again, car starts and shuts off right away (0.5 sec)
3. car is unresponsive to hitting throttle.
4. i've looked everywhere for vacuum leaks and everything is fine, no leaks.

its almost like if i shut it off and leave it a while the car will run a second longer... I don't know if the cylinders are getting flooded or anything..

This has a lovefab manifold, stock mafs (for now) q45 TPS/Q45 TB, freddy intake manifold, gt3582r, fmic, exhaust..

o2 is installed as well.

Stock ECU (S2 AUto) , Stock mafs
Clamping fuel line does nothing, CAS is about half way. Is there such thing as a fuel pump Relay? Could that have gone bad or be losing 12v signal? What about the AAC/Boost Valve/VTC Control what if that is wired wrong?
Unplugging mafs or TPS does nothing, no change. And like i said the car doesnt respond to any throttle. I do have a q45 TPS, but i believe its wired correctly.

I am so so stumped and tired of this s***! How do you check codes on an ecu w/o an LED? Who thinks its something electrical?

02-19-2009, 04:18 AM	#1
opponheimer Zilvia FREAK! Join Date: Apr 2007 Location: Bikini Atoll Posts: 1,267 Trader Rating: (3) Feedback Score: 3 reviews	Rb25 Swap Complete! (PIC) Issue keeping the car running i finally got my car together, manifold/turbo/full exhaust is on the car... the car still starts up, then shuts off.. Its getting fuel pressure i believe... had no issues with pump 3 weeks ago when it had a ka24de.after a while of sitting this is what happens: 1. turn key, car starts, tach goes to like 3k (uncalibrated) and shuts off after 2 seconds. 2. try to start again, car starts and shuts off right away (0.5 sec) 3. car is unresponsive to hitting throttle. 4. i've looked everywhere for vacuum leaks and everything is fine, no leaks. its almost like if i shut it off and leave it a while the car will run a second longer... I don't know if the cylinders are getting flooded or anything.. This has a lovefab manifold, stock mafs (for now) q45 TPS/Q45 TB, freddy intake manifold, gt3582r, fmic, exhaust.. o2 is installed as well. Stock ECU (S2 AUto) , Stock mafs Clamping fuel line does nothing, CAS is about half way. Is there such thing as a fuel pump Relay? Could that have gone bad or be losing 12v signal? What about the AAC/Boost Valve/VTC Control what if that is wired wrong? Unplugging mafs or TPS does nothing, no change. And like i said the car doesnt respond to any throttle. I do have a q45 TPS, but i believe its wired correctly. I am so so stumped and tired of this s***! How do you check codes on an ecu w/o an LED? Who thinks its something electrical?