Fuel pressure problems - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

r.qualls72 · 01-15-2021, 11:28 AM

I have a 2011 2SS. I was driving it around town the other day & it just died. It would crank over but not start. During this time my fuel gauge went from 1/4 to over full. If I would let it set for a while, it would start back up for a few minutes then die again. I got it home, changed the in tank pump out with a cheap Amazon pump. Car ran fine for a couple miles then started missing & rough idle & would eventually die. Let it set a while & it will fire right back up for a few minutes & repeat the cycle. Not sure if its' the cheap pump I installed or if it might be FPCM or maybe the tank pressure sensor. Don't mind purchasing what I need, just don't want to throw parts at it. As it would idle, then start to run rough, the fuel pressure would drop to 0.

These are the codes I was getting with my Blue Driver code reader.

P0230
P069E
P025A

granatl · 01-15-2021, 02:29 PM

FPCM sends a pulse width signal (something like the injectors get) to regulate the fuel pressure.
Did you make sure that your cheap pump accepts this or is it a regular on/off pump

gtstorey · 01-15-2021, 02:39 PM

Did you get the same codes before the pump change?

r.qualls72 · 01-15-2021, 03:32 PM

I did not make sure about that. I am far from a mechanic. My knowledge is less than limited. I do feel that it is pump related. But hate to spend 300-400 on oem replacement without being more certain.

r.qualls72 · 01-15-2021, 03:37 PM

These are codes after fuel pump was installed. I did omit P0325 knock code. I believe P0325 is comes on because of running lean when running out of fuel. I didn't have my code reader before I changed the pump. I knew there was a pump issue because the pump wasn't cycling on & the way the fuel gauge read. All codes are after pump was installed.

gtstorey · 01-15-2021, 04:12 PM

It wasn't necessarily a pump issue before since the pump running and gauge aren't really connected at the pump end, other than ground. It could be a fuel pump control module issue or a wiring problem.

r.qualls72 · 01-15-2021, 04:29 PM

Ok, I will look into getting one. Thanks G

gsxrturbo · 01-15-2021, 06:36 PM

if it was me i would check the fuel pressure at the fuel rail.

r.qualls72 · 01-18-2021, 03:56 PM

Fuel pressure at the rail is 58-59 by my guage & my code reader. Then car starts having issues & drops to zero.

01-15-2021, 11:28 AM	#1
r.qualls72 Drives: 2011 Camaro SS Join Date: Sep 2020 Location: Baxter Springs, KS Posts: 5 View My Garage	Fuel pressure problems I have a 2011 2SS. I was driving it around town the other day & it just died. It would crank over but not start. During this time my fuel gauge went from 1/4 to over full. If I would let it set for a while, it would start back up for a few minutes then die again. I got it home, changed the in tank pump out with a cheap Amazon pump. Car ran fine for a couple miles then started missing & rough idle & would eventually die. Let it set a while & it will fire right back up for a few minutes & repeat the cycle. Not sure if its' the cheap pump I installed or if it might be FPCM or maybe the tank pressure sensor. Don't mind purchasing what I need, just don't want to throw parts at it. As it would idle, then start to run rough, the fuel pressure would drop to 0. These are the codes I was getting with my Blue Driver code reader. P0230 P069E P025A

01-15-2021, 02:29 PM	#2
granatl Drives: 2SS RS ABM A6 Join Date: Jun 2010 Location: Pahrump, NV Posts: 273	FPCM sends a pulse width signal (something like the injectors get) to regulate the fuel pressure. Did you make sure that your cheap pump accepts this or is it a regular on/off pump __________________ Jack Bilger

01-15-2021, 02:39 PM	#3
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,154	Did you get the same codes before the pump change?

01-15-2021, 03:32 PM	#4
r.qualls72 Drives: 2011 Camaro SS Join Date: Sep 2020 Location: Baxter Springs, KS Posts: 5 View My Garage	I did not make sure about that. I am far from a mechanic. My knowledge is less than limited. I do feel that it is pump related. But hate to spend 300-400 on oem replacement without being more certain.

01-15-2021, 03:37 PM	#5
r.qualls72 Drives: 2011 Camaro SS Join Date: Sep 2020 Location: Baxter Springs, KS Posts: 5 View My Garage	These are codes after fuel pump was installed. I did omit P0325 knock code. I believe P0325 is comes on because of running lean when running out of fuel. I didn't have my code reader before I changed the pump. I knew there was a pump issue because the pump wasn't cycling on & the way the fuel gauge read. All codes are after pump was installed.

01-15-2021, 04:12 PM	#6
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,154	It wasn't necessarily a pump issue before since the pump running and gauge aren't really connected at the pump end, other than ground. It could be a fuel pump control module issue or a wiring problem.

01-15-2021, 04:29 PM	#7
r.qualls72 Drives: 2011 Camaro SS Join Date: Sep 2020 Location: Baxter Springs, KS Posts: 5 View My Garage	Ok, I will look into getting one. Thanks G

01-15-2021, 06:36 PM	#8
gsxrturbo Drives: 2010 ss Join Date: Oct 2015 Location: windom mn Posts: 337	if it was me i would check the fuel pressure at the fuel rail.

01-18-2021, 03:56 PM	#9
r.qualls72 Drives: 2011 Camaro SS Join Date: Sep 2020 Location: Baxter Springs, KS Posts: 5 View My Garage	Fuel pressure at the rail is 58-59 by my guage & my code reader. Then car starts having issues & drops to zero.