How do I check fuel pump and pressure? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

aaberg · 07-31-2021, 04:51 AM

I think my fuel pump doesn't work. How do I check fuel pump and pressure on A Camaro 2012 SS?

aaberg · 07-31-2021, 06:26 AM

Update: I have pulled this info with OBD tool:

Fuel pressure: 310 kPa (45 psi)
Fuel pump Commanded state 52 % (then I increase to about 60 it drops back to about 50 - doesn't know meaning of that).

If I have understand the service manual correct the fuel line pressure should increase to greater than 410 kPa (60 psi)

morepowerjoe · 07-31-2021, 07:07 AM

Yeah I think that is a little low. Mine at idle is right at 58 psi.

hunter1660 · 07-31-2021, 08:43 AM

Shrader valve on fuel rail

gunchamp · 07-31-2021, 09:11 AM

Quote:

Originally Posted by hunter1660

Shrader valve on fuel rail

Yup. Screw a mechanical fuel gauge on there and start her up

aaberg · 07-31-2021, 01:41 PM

Yes, I will buy a mechanical fuel gauge!

Video from latest start: https://youtu.be/j9eKtrIbaTo

I have used STP injector cleaner and and added another 3 gallon gas today. Think the car runs a bit better after running engine (not driving) for about 15 minutes.

As the OBD-reading shows it's also up to 400 kPa/58 psi. Can it be there is dirt and water in the lines? During engine restoration the car have stand still in garage for 1,5 years. But still no idle below 600 rpm.

07-31-2021, 04:51 AM	#1
aaberg 30th conv & 45th 2SS conv Drives: 1997 30th conv & 2012 45th conv Join Date: Jul 2017 Location: Sweden Posts: 127 View My Garage	How do I check fuel pump and pressure? I think my fuel pump doesn't work. How do I check fuel pump and pressure on A Camaro 2012 SS?

07-31-2021, 06:26 AM	#2
aaberg 30th conv & 45th 2SS conv Drives: 1997 30th conv & 2012 45th conv Join Date: Jul 2017 Location: Sweden Posts: 127 View My Garage	Update: I have pulled this info with OBD tool: Fuel pressure: 310 kPa (45 psi) Fuel pump Commanded state 52 % (then I increase to about 60 it drops back to about 50 - doesn't know meaning of that). If I have understand the service manual correct the fuel line pressure should increase to greater than 410 kPa (60 psi) Last edited by aaberg; 07-31-2021 at 06:38 AM.

07-31-2021, 07:07 AM	#3
morepowerjoe Drives: 2012 Chevrolet Camaro l99 Join Date: Aug 2020 Location: Austin, TX Posts: 2,232	Yeah I think that is a little low. Mine at idle is right at 58 psi. __________________ DSS Pistons, Eagle ESP L19 Rods, ARP Head and Main Studs, TSP PRC CNC Ported Heads milled .030, Cometic .040 Head Gaskets, GPI SS3 VVT Camshaft, GM Racing Lifters, CHE Trunnions, Melling 10355HV Oil Pump, Cold Air Inductions CAI, Fast LSXR Intake Manifold, Nick Williams 103 TB, TSP Longtubes, ZL1 Fuel Pump, Mishimoto Radiator and Oil Cooler, 3600 Circle D Converter, Tru Cool 40k Tranny Cooler, Fluid Dynamics Balancer, EBC 3GD Rotors with EBC Bluestuff NDX Pads, Bilstein B6 Shocks / Struts with Eibach ZL1 Drop Springs Build Thread https://www.camaro5.com/forums/showthread.php?t=609817

07-31-2021, 08:43 AM	#4
hunter1660 Drives: 2011ss/rs camaro Join Date: Sep 2011 Location: florida Posts: 1,261	Shrader valve on fuel rail __________________ . OBX LTH,Rotofab,Magnuson Heartbeat.AEM wideband, HP Tuners

07-31-2021, 01:41 PM	#6
aaberg 30th conv & 45th 2SS conv Drives: 1997 30th conv & 2012 45th conv Join Date: Jul 2017 Location: Sweden Posts: 127 View My Garage	Yes, I will buy a mechanical fuel gauge! Video from latest start: https://youtu.be/j9eKtrIbaTo I have used STP injector cleaner and and added another 3 gallon gas today. Think the car runs a bit better after running engine (not driving) for about 15 minutes. As the OBD-reading shows it's also up to 400 kPa/58 psi. Can it be there is dirt and water in the lines? During engine restoration the car have stand still in garage for 1,5 years. But still no idle below 600 rpm.