FUEL PRESSURE DROPPING - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

SLY5ACE · 07-23-2020, 10:18 AM

MY 13 SS SUPERCHARGED CAMARO IS DROPPING FUEL PRESSURE
I HAVE A DSX FUEL SYSTEM WITH E85 FLEX FUEL SENSOR AND TOOK TO DYNO AND IT CONSTANTLY DROPS FUEL PRESSURE CAUSING A MIS. HAS ANYONE HEARD OF THIS AND WHAT COULD BE THE ISSUE?

Greenhornet2 · 07-23-2020, 10:36 AM

how much it is dropping? The FPCM must be programmed to not allow the pressure to drop for one. Is it continually dropping or is it dropping by 10psi and staying there? How much power? how much boost? What Injectors?

gtstorey · 07-23-2020, 10:48 AM

Your tuner should be able to point you in a direction to start, If they can't I wouldn't trust them to tune.

SLY5ACE · 07-23-2020, 02:29 PM

SLP SUPERCHARGER 8-10 LB OF BOOST DSX FUEL KIT TEXAS SPEED LONG BLOCK, KOOKS HEADERS SOLO PERFORMANCE EXHAUST 1260CC INJECTORS
AT 5500 RPMS FULL THROTTLE FULL PRESSURE DROPPED DOWN TO 39PSI

Greenhornet2 · 07-23-2020, 02:54 PM

Quote:

Originally Posted by SLY5ACE

SLP SUPERCHARGER 8-10 LB OF BOOST DSX FUEL KIT TEXAS SPEED LONG BLOCK, KOOKS HEADERS SOLO PERFORMANCE EXHAUST 1260CC INJECTORS
AT 5500 RPMS FULL THROTTLE FULL PRESSURE DROPPED DOWN TO 39PSI

For one I'd make sure the FPCM is programmed correctly I think it's 1 credit with hptuners. Other than that verify the aux pump is turning on, it's low enough in the tank to not be sucking air and the hobbs switch or whatever you are using as signal to turn on the aux pump is working. Are you using the stock SS pump? This should be able to be figured out by your tuner, if not you need a new tuner.

SLY5ACE · 07-24-2020, 07:41 AM

THE DSX FUEL SYSTEM HAS A BUTTON YOU HIT TO SEE IF ITS TURNING ON WE HAD HP TUNERS CHECK FUEL PRESSURE WHEN WE HIT THE BUTTON SO THAT SYSTEM IS WORKING, AND IT IT WHEN WE HIT THE BUTTON FUEL PRESSURE JUMPED TO 80PSI.

joshnmn · 07-24-2020, 07:52 AM

So you verified the aux pump works. Sounds like it’s not getting the signal to start. Is it on a Hobbs? I would check power/ground to the switch and the boost signal (leaks).

moloko · 07-27-2020, 10:49 AM

I have fuel pressure issue in my Camaro 2011 V6. Has a lot of misfires, white smoke in exhaust, "reduced engine power" messaje in dash, codes: P0087 low fuel pressure, P0089 Fuel regulator, P0300 multiple misfires.

Changed the High fuel pump but the problem still there

Greenhornet2 · 07-27-2020, 12:28 PM

Quote:

Originally Posted by moloko

I have fuel pressure issue in my Camaro 2011 V6. Has a lot of misfires, white smoke in exhaust, "reduced engine power" messaje in dash, codes: P0087 low fuel pressure, P0089 Fuel regulator, P0300 multiple misfires.

Changed the High fuel pump but the problem still there

You might have a problem with your injectors. But this thread has nothing to do with your fuel system. Completely different systems.

silversleeper · 07-27-2020, 01:25 PM

Quote:

Originally Posted by moloko

I have fuel pressure issue in my Camaro 2011 V6. Has a lot of misfires, white smoke in exhaust, "reduced engine power" messaje in dash, codes: P0087 low fuel pressure, P0089 Fuel regulator, P0300 multiple misfires.

Changed the High fuel pump but the problem still there

I took the time to give you a very long full answer in your thread which went ignored. Shows how dumb I am to have bothered.

07-23-2020, 10:18 AM	#1
SLY5ACE Drives: 2013 camaro ss 1le supercharged Join Date: Apr 2016 Location: bettendorf, ia Posts: 122 View My Garage	FUEL PRESSURE DROPPING MY 13 SS SUPERCHARGED CAMARO IS DROPPING FUEL PRESSURE I HAVE A DSX FUEL SYSTEM WITH E85 FLEX FUEL SENSOR AND TOOK TO DYNO AND IT CONSTANTLY DROPS FUEL PRESSURE CAUSING A MIS. HAS ANYONE HEARD OF THIS AND WHAT COULD BE THE ISSUE?

07-23-2020, 10:36 AM	#2
Greenhornet2 Drives: 2011 Camaro 2SS LS3 Whipple Join Date: May 2019 Location: Connecticut Posts: 1,925	how much it is dropping? The FPCM must be programmed to not allow the pressure to drop for one. Is it continually dropping or is it dropping by 10psi and staying there? How much power? how much boost? What Injectors? __________________ Whipple 2.9 CAI ID1050x injectors ZL1 Pump JRE FPCM JMS Voltage booster JRE Rough Idle blower cam BTR .660 springs CHE trunnion kit 1 7/8 Speed Engineering Borla Atak JRE scoop 1.5" lowering springs BMR trailing arms and toe links Cradle inserts 704WHP 603WTQ 93 octane

07-23-2020, 10:48 AM	#3
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,188	Your tuner should be able to point you in a direction to start, If they can't I wouldn't trust them to tune.

07-23-2020, 02:29 PM	#4
SLY5ACE Drives: 2013 camaro ss 1le supercharged Join Date: Apr 2016 Location: bettendorf, ia Posts: 122 View My Garage	SLP SUPERCHARGER 8-10 LB OF BOOST DSX FUEL KIT TEXAS SPEED LONG BLOCK, KOOKS HEADERS SOLO PERFORMANCE EXHAUST 1260CC INJECTORS AT 5500 RPMS FULL THROTTLE FULL PRESSURE DROPPED DOWN TO 39PSI

07-24-2020, 07:41 AM	#6
SLY5ACE Drives: 2013 camaro ss 1le supercharged Join Date: Apr 2016 Location: bettendorf, ia Posts: 122 View My Garage	THE DSX FUEL SYSTEM HAS A BUTTON YOU HIT TO SEE IF ITS TURNING ON WE HAD HP TUNERS CHECK FUEL PRESSURE WHEN WE HIT THE BUTTON SO THAT SYSTEM IS WORKING, AND IT IT WHEN WE HIT THE BUTTON FUEL PRESSURE JUMPED TO 80PSI.

07-24-2020, 07:52 AM	#7
joshnmn 2&THEHIT Drives: 5th Gen Camaro; 5th Gen Ram 3500 Join Date: Mar 2018 Location: Garner, NC Posts: 1,017 View My Garage	So you verified the aux pump works. Sounds like it’s not getting the signal to start. Is it on a Hobbs? I would check power/ground to the switch and the boost signal (leaks).

07-27-2020, 10:49 AM	#8
moloko Drives: Camaro V6 2011 and 2014 V6 Join Date: May 2017 Location: Sth Am Posts: 120	I have fuel pressure issue in my Camaro 2011 V6. Has a lot of misfires, white smoke in exhaust, "reduced engine power" messaje in dash, codes: P0087 low fuel pressure, P0089 Fuel regulator, P0300 multiple misfires. Changed the High fuel pump but the problem still there