Fuel rail install
06-10-2015, 07:20 PM
#1
Fuel rail install
I've looked everywhere and the AEM instructions say to loosen a 6mm service bolt to relieve the fuel pressure but if your car doesn't have one then you need to loosen the banjo bolt from the top of the fuel filter. Is there any way I can do this without going to the fuel filter? TIA.
06-11-2015, 04:54 AM
#2
You relieve pressure at the fuel pulsation damper there is no fuel filter. But if you don't want to loosen it then loosen the fuel pressure regulator, same effect. Let the car sit overnight if you can , the pressure will be pretty low by then and you won't get much fuel spraying out, just leakage. Just have lots of rags available to catch some loose fuel, and work in a ventilated area. I like to wrap the exposed parts in Ziploc bags with a tight elastic or zip tie to reduce fumes and leaks while you are working to put things back together. Keep the parts as high up as possible in the engine bay to reduce gas leaking out.
06-11-2015, 07:54 AM
#3
You relieve pressure at the fuel pulsation damper there is no fuel filter. But if you don't want to loosen it then loosen the fuel pressure regulator, same effect. Let the car sit overnight if you can , the pressure will be pretty low by then and you won't get much fuel spraying out, just leakage. Just have lots of rags available to catch some loose fuel, and work in a ventilated area. I like to wrap the exposed parts in Ziploc bags with a tight elastic or zip tie to reduce fumes and leaks while you are working to put things back together. Keep the parts as high up as possible in the engine bay to reduce gas leaking out.
As for pressure, i usually just open the gas cap
06-11-2015, 10:15 AM
#4
Registered User
You relieve pressure at the fuel pulsation damper there is no fuel filter. But if you don't want to loosen it then loosen the fuel pressure regulator, same effect. Let the car sit overnight if you can , the pressure will be pretty low by then and you won't get much fuel spraying out, just leakage. Just have lots of rags available to catch some loose fuel, and work in a ventilated area. I like to wrap the exposed parts in Ziploc bags with a tight elastic or zip tie to reduce fumes and leaks while you are working to put things back together. Keep the parts as high up as possible in the engine bay to reduce gas leaking out.
Relieve fuel pressure, I'll throw in my own opinion here, but everyone can do this part as they wish. Honda wants you to loosen the fuel pulsation damper (UFO looking plastic covered metal part )located on the center of the fuel rail. I prefer to do it a different way. When you open the fuel pulsation damper you need to replace two tiny washers underneath it, which no Honda dealer carries in stock (special order items from Japan), if you try to re-use the old ones they will leak. You also need to torque the damper back in place to 16 ft lbs and you need a larger sized wrench to do that - I think it's 22mm if I recall or some odd size. It is a PIA to reinstall the pulsation dampener at the correct torque and to get the replacement washers IMO. If the car sits overnight it won't have much fuel pressure the next day, so let the car sit if you can and the pressure will drop on its own. If you are doing this job after a recent drive then it will have higher fuel pressure and you really need to release that pressure. You could relieve fuel pressure by running the engine and pulling the fuel pump fuse and letting the engine die, that will work. I prefer to let it sit overnight or possibly longer. You could also remove the fuel pressure regulator instead of the pulsation dampener, I find the fuel pressure regulator easier to remove and reinstall as compared to the pulsation dampener. Do this on a cold engine, so let it sit overnight and it will work fine and you don't need to worry about exess fuel pressure. Fuel will leak out regardless of how you do it so be prepared to soak up excess fuel that leaks using towels , rags, plastic bags etc.. .
06-11-2015, 04:25 PM
#5
Originally Posted by zeroptzero' timestamp='1434027247' post='23644561
You relieve pressure at the fuel pulsation damper there is no fuel filter. But if you don't want to loosen it then loosen the fuel pressure regulator, same effect. Let the car sit overnight if you can , the pressure will be pretty low by then and you won't get much fuel spraying out, just leakage. Just have lots of rags available to catch some loose fuel, and work in a ventilated area. I like to wrap the exposed parts in Ziploc bags with a tight elastic or zip tie to reduce fumes and leaks while you are working to put things back together. Keep the parts as high up as possible in the engine bay to reduce gas leaking out.
Relieve fuel pressure, I'll throw in my own opinion here, but everyone can do this part as they wish. Honda wants you to loosen the fuel pulsation damper (UFO looking plastic covered metal part )located on the center of the fuel rail. I prefer to do it a different way. When you open the fuel pulsation damper you need to replace two tiny washers underneath it, which no Honda dealer carries in stock (special order items from Japan), if you try to re-use the old ones they will leak. You also need to torque the damper back in place to 16 ft lbs and you need a larger sized wrench to do that - I think it's 22mm if I recall or some odd size. It is a PIA to reinstall the pulsation dampener at the correct torque and to get the replacement washers IMO. If the car sits overnight it won't have much fuel pressure the next day, so let the car sit if you can and the pressure will drop on its own. If you are doing this job after a recent drive then it will have higher fuel pressure and you really need to release that pressure. You could relieve fuel pressure by running the engine and pulling the fuel pump fuse and letting the engine die, that will work. I prefer to let it sit overnight or possibly longer. You could also remove the fuel pressure regulator instead of the pulsation dampener, I find the fuel pressure regulator easier to remove and reinstall as compared to the pulsation dampener. Do this on a cold engine, so let it sit overnight and it will work fine and you don't need to worry about exess fuel pressure. Fuel will leak out regardless of how you do it so be prepared to soak up excess fuel that leaks using towels , rags, plastic bags etc.. .
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06-15-2015, 04:16 AM
#9
Moderator
06-20-2015, 07:01 PM
#10
So it turns out that to replace the fuel rail the pulse damper had to come off anyway. Had a bit of trouble with the injectors, damper, and fuel rail leaking for various reasons. I had to really torque down the end of the fuel rail because fuel was just spraying out of it. The damper started leaking when I cranked it up so I used the supplied washers instead of the OEM washers. I took it out for a drive and no leaks, so far so good. Next up is running the fuel pressure sensor through the firewall to the AEM Infinity. Any tips? Thanks again.