Fuel pressure issues? - Competition Diesel.Com

megastang · 04-07-2015, 09:27 PM

I was watching some data trying to find the cause of a miss my wife noticed the other day. The engine is an 06 that I got from my dad. It still has the floorit cp3 pump on it (don't know what %) stock injectors and stock tune. the only modifications are a colt cam, and a heater grid delete. I noticed that at idle desired pressure is 6600 and actual fuel pressure is in the 14-15000 psi range. Fca current is near the max and fca actual duty cycle is in the negative most of the time. Is this due to the modified cp3? it seems like the FCA can't get the fuel pressure down where it should be. Any advice would be greatly appreciated

huhta99 · 04-07-2015, 09:39 PM

relief maybe bad on the rail

YoungDiesel27 · 04-07-2015, 10:06 PM

Sounds like an fca to me.

huhta99 · 04-07-2015, 11:07 PM

Oh man I need to slow down and read sorry

megastang · 04-08-2015, 07:42 AM

could the fca cause or contribute to a miss?

DionysiosA76 · 04-08-2015, 08:25 AM

Quote:

Originally Posted by megastang

could the fca cause or contribute to a miss?

Yes it will. That FCA is pulse width modulated, meaning it opens and closes very fast, if it starts to mess up, everything is effected.

Sent from my iPhone using Tapatalk

megastang · 04-09-2015, 07:54 PM

fca is on the way

megastang · 04-13-2015, 07:30 PM

The FCA took care of the high rail pressure at idle but the miss isn't completely gone. I still have a P0148 fuel delivery error code active and injector 4 balance rate is close to 4. All the other cylinders are in the -1 to 1 range. Am I looking at a bad injector?

huhta99 · 04-13-2015, 07:52 PM

I'd say so

tylerltr450 · 04-14-2015, 07:13 PM

Yes I would say so also

megastang · 04-18-2015, 02:01 PM

I got my fca from geno's garage and i was looking at injectors in the catalog they sent along in the box. It says once one injector goes the rest are likely to start failing soon after. Is this usually the case? i'm trying to figure out if i should just replace #4 or if I should do the whole set. I'd rather not spend the money for a whole set but I also don't want to be chasing injectors till they're all done.

megastang · 05-17-2015, 04:08 PM

I decided that this isn't an efi live topic anymore so I started a new post here

04-07-2015, 09:27 PM	#1
megastang Name: megastang Title: Diesel Enthusiast Status: Not Here Join Date: Aug 2012 Member`s Gallery Posts: 148	Fuel pressure issues? I was watching some data trying to find the cause of a miss my wife noticed the other day. The engine is an 06 that I got from my dad. It still has the floorit cp3 pump on it (don't know what %) stock injectors and stock tune. the only modifications are a colt cam, and a heater grid delete. I noticed that at idle desired pressure is 6600 and actual fuel pressure is in the 14-15000 psi range. Fca current is near the max and fca actual duty cycle is in the negative most of the time. Is this due to the modified cp3? it seems like the FCA can't get the fuel pressure down where it should be. Any advice would be greatly appreciated

04-14-2015, 07:13 PM	#10
tylerltr450 Name: tylerltr450 Title: Wanna Be Hacker Status: Not Here Join Date: Aug 2014 Location: Coal Region, PA Member`s Gallery Posts: 189	Yes I would say so also __________________ 2006 Red 5.9 Traction Bars, S&B Intake, ATS intake horn, EFI Live, Borg Warner S363 Turbo, Industrial Injection 60hp Injectors. Auto to nv5600(Complete). SBC 3600 Custom EFI Live Tuning FullPullPerformance@gmail.com

04-18-2015, 02:01 PM	#11
megastang Name: megastang Title: Diesel Enthusiast Status: Not Here Join Date: Aug 2012 Member`s Gallery Posts: 148	What to do I got my fca from geno's garage and i was looking at injectors in the catalog they sent along in the box. It says once one injector goes the rest are likely to start failing soon after. Is this usually the case? i'm trying to figure out if i should just replace #4 or if I should do the whole set. I'd rather not spend the money for a whole set but I also don't want to be chasing injectors till they're all done.

04-07-2015, 09:39 PM	#2
huhta99 Name: huhta99 Title: one nation under God Status: Not Here Join Date: Apr 2008 Location: a barren wasteland Member`s Gallery Posts: 683	relief maybe bad on the rail

04-07-2015, 10:06 PM	#3
YoungDiesel27 Name: YoungDiesel27 Title: Never Enough Time Status: Not Here Join Date: Jul 2010 Location: West Virginia Member`s Gallery Posts: 825	Sounds like an fca to me.

04-07-2015, 11:07 PM	#4
huhta99 Name: huhta99 Title: one nation under God Status: Not Here Join Date: Apr 2008 Location: a barren wasteland Member`s Gallery Posts: 683	Oh man I need to slow down and read sorry

04-08-2015, 07:42 AM	#5
megastang Name: megastang Title: Diesel Enthusiast Status: Not Here Join Date: Aug 2012 Member`s Gallery Posts: 148	could the fca cause or contribute to a miss?

04-09-2015, 07:54 PM	#7
megastang Name: megastang Title: Diesel Enthusiast Status: Not Here Join Date: Aug 2012 Member`s Gallery Posts: 148	fca is on the way

04-13-2015, 07:30 PM	#8
megastang Name: megastang Title: Diesel Enthusiast Status: Not Here Join Date: Aug 2012 Member`s Gallery Posts: 148	The FCA took care of the high rail pressure at idle but the miss isn't completely gone. I still have a P0148 fuel delivery error code active and injector 4 balance rate is close to 4. All the other cylinders are in the -1 to 1 range. Am I looking at a bad injector?

04-13-2015, 07:52 PM	#9
huhta99 Name: huhta99 Title: one nation under God Status: Not Here Join Date: Apr 2008 Location: a barren wasteland Member`s Gallery Posts: 683	I'd say so

05-17-2015, 04:08 PM	#12
megastang Name: megastang Title: Diesel Enthusiast Status: Not Here Join Date: Aug 2012 Member`s Gallery Posts: 148	I decided that this isn't an efi live topic anymore so I started a new post here