Fuel system issues - pump not kicking on- ecu issue?

weebs25 · 06-02-2025, 04:39 PM

Hey all,

Been having some troubles for a bit finally getting at it. Left a track event last fall and my car stuttered and shut off. Started again - 10 min later stuttered and shut off. Trailered home and if starts right up just fine -
Next day not at all! So I replaced my fuel pump while double checking my work with the basket out. Still having same issue- anyone ran into something like this? It worked day 1 with new pump day 2 the pump won’t kick on so I have no fuel pressure etc. such a flaky on and off situation I’m pretty stumped on this. This is all with the car not moving just parked in my garage so nothing is shifting etc. possible ignition system/ecu issue?

I don’t see a wiring problem anywhere, not a fuse…any advice or ideas on this one would be great
.
Car is supercharged with ecutek tune/1200cc injectors/deatschwerks pump and pump wiring kit.

Spooler · 06-02-2025, 05:01 PM

It sounds like an electrical issue. Get your VOM out and start testing. Could be the relay, could be a bad wire.

weebs25 · 06-02-2025, 05:58 PM

I have been fortunate and never had a single problem with relays in 12 years with this car so I haven’t ever messed with them! A bit clueless for troubleshooting on this stuff of all things. Thanks for the quick response

weebs25 · 06-29-2025, 04:44 PM

Bump for this - I have checked and swapped fuses- relaxed inline relay for file pump kit- checked wiring, and replaced the fuel pump. Does not kick on and 0 fuel pressure

2011 Nismo#91 · 06-30-2025, 06:04 AM

Stop replacing stuff and start finding the problem. Is the fuel pump getting power? If yes go down the line and see if something is blocking the piping. If not go up the power line and see if the next device is getting power and so on. You might be replacing items that are fine.

weebs25 · 07-06-2025, 11:09 AM

This is where I’m confused - and seeking advice- I have power to my inline relay - the fuel pump kit relay - right before my pump- a foot away. I have replaced the relay thinking next in line - no change. Next checked and re done cabling after that - and the pump! Just figured I’d see if anyone else has ran into an issue similar. The car ran fine for 2 years of track use and then dropped on my way home. Might start today- and shut off 5 min later. And not start for a week- simply can’t use it until I actually nail the culprit. I am replacing or swapping one at a time of major parts and not having luck

06-02-2025, 04:39 PM	#1 (permalink)
weebs25 Base Member Join Date: Mar 2013 Location: mn Posts: 224 Drives: 09 black mt Rep Power: 3368	Fuel system issues - pump not kicking on- ecu issue? Hey all, Been having some troubles for a bit finally getting at it. Left a track event last fall and my car stuttered and shut off. Started again - 10 min later stuttered and shut off. Trailered home and if starts right up just fine - Next day not at all! So I replaced my fuel pump while double checking my work with the basket out. Still having same issue- anyone ran into something like this? It worked day 1 with new pump day 2 the pump won’t kick on so I have no fuel pressure etc. such a flaky on and off situation I’m pretty stumped on this. This is all with the car not moving just parked in my garage so nothing is shifting etc. possible ignition system/ecu issue? I don’t see a wiring problem anywhere, not a fuse…any advice or ideas on this one would be great . Car is supercharged with ecutek tune/1200cc injectors/deatschwerks pump and pump wiring kit.

06-30-2025, 06:04 AM	#5 (permalink)
2011 Nismo#91 A True Z Fanatic Join Date: Mar 2011 Location: NJ Posts: 2,412 Drives: slowly Rep Power: 40570	Stop replacing stuff and start finding the problem. Is the fuel pump getting power? If yes go down the line and see if something is blocking the piping. If not go up the power line and see if the next device is getting power and so on. You might be replacing items that are fine. Memphis370Z likes this. __________________ GTR TT 493Whp/431lbft, Ecutek, Southbend 6puck,Quaife, RPM RollBar 4Point, R888R, JRZ RSPro F(10R/10C) R(10R/6C) 1000f500r inlbs+150inlbs Tender, SPL everywhere.Full Specs

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06-02-2025, 05:01 PM	#2 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,123 Drives: 2013 Nismo 370z Rep Power: 2684394	It sounds like an electrical issue. Get your VOM out and start testing. Could be the relay, could be a bad wire.

06-02-2025, 05:58 PM	#3 (permalink)
weebs25 Base Member Join Date: Mar 2013 Location: mn Posts: 224 Drives: 09 black mt Rep Power: 3368	I have been fortunate and never had a single problem with relays in 12 years with this car so I haven’t ever messed with them! A bit clueless for troubleshooting on this stuff of all things. Thanks for the quick response

06-29-2025, 04:44 PM	#4 (permalink)
weebs25 Base Member Join Date: Mar 2013 Location: mn Posts: 224 Drives: 09 black mt Rep Power: 3368	Bump for this - I have checked and swapped fuses- relaxed inline relay for file pump kit- checked wiring, and replaced the fuel pump. Does not kick on and 0 fuel pressure

07-06-2025, 11:09 AM	#6 (permalink)
weebs25 Base Member Join Date: Mar 2013 Location: mn Posts: 224 Drives: 09 black mt Rep Power: 3368	This is where I’m confused - and seeking advice- I have power to my inline relay - the fuel pump kit relay - right before my pump- a foot away. I have replaced the relay thinking next in line - no change. Next checked and re done cabling after that - and the pump! Just figured I’d see if anyone else has ran into an issue similar. The car ran fine for 2 years of track use and then dropped on my way home. Might start today- and shut off 5 min later. And not start for a week- simply can’t use it until I actually nail the culprit. I am replacing or swapping one at a time of major parts and not having luck