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Title: C5 allroad in-tank return restriction Post by: opntrk86 on February 19, 2017, 08:23:03 AM I'm starting to tune my stock engine ft-21 allroad and have been chasing a rich LTFT issue. Fueling is 550 ev14 injectors (0280158117) @ 4bar, stock lines and walbro 450 pump in the stock housing. I have high fuel pressure (around 5 bar) that drops back to normal when I disconnect the return line at the tank hat and let it run into a gas can. So It looks like the return system in the tank can't handle the added volume.
I know many have ran this pump in stock lines (but probably not many with injectors this small on gas) and I never heard of anyone having issue. Has anyone seen this before? Title: Re: C5 allroad in-tank return restriction Post by: nyet on February 19, 2017, 12:40:30 PM check your evap system? just a wild ass guess
Title: Re: C5 allroad in-tank return restriction Post by: opntrk86 on February 19, 2017, 01:38:04 PM I think I ruled that out, no change when venting the tank to atmosphere.
I just find something interesting though, while running into a gas can I ran the tank down to about 1/8 full. When I hooked the tank return back up FP had dropped to 3.5-4 bar, but was bouncing around alot. Put 2 gal back in the tank and FP was back to 5 bar rock soild. Title: Re: C5 allroad in-tank return restriction Post by: nyet on February 19, 2017, 01:44:39 PM Something might still be wrong wrong with tank ventilation. Check carbon filter?
Title: C5 allroad in tank return restriction Post by: DavidPrefs on June 23, 2017, 04:33:41 AM Yea if you call the Nissan hotline or your local dealer, they will replace the fuel tank with a new version.
Title: Re: C5 allroad in tank return restriction Post by: KasperH on June 23, 2017, 04:45:11 AM Yea if you call the Nissan hotline or your local dealer, they will replace the fuel tank with a new version. Nissan? Title: Re: C5 allroad in-tank return restriction Post by: rogerius on June 23, 2017, 05:31:59 AM I'm starting to tune my stock engine ft-21 allroad and have been chasing a rich LTFT issue. Fueling is 550 ev14 injectors (0280158117) @ 4bar, stock lines and walbro 450 pump in the stock housing. I have high fuel pressure (around 5 bar) that drops back to normal when I disconnect the return line at the tank hat and let it run into a gas can. So It looks like the return system in the tank can't handle the added volume. I know many have ran this pump in stock lines (but probably not many with injectors this small on gas) and I never heard of anyone having issue. Has anyone seen this before? How big (or small) is the restriction of your FPR? Not all FPR have same dia restriction/return. If too small, pressure at injectors could be more than nominal. |