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Post by jmyers8 on Sept 6, 2016 12:39:45 GMT -5
where are you guys running the return on a stock 4.6 setup. I have a boat tank with a return port but cannot find on the motor where to run it to. the one spot i thought was it doesn't seem to be sending fuel back with an inline pump. any picture would be great.
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Post by pantera77 on Sept 7, 2016 0:47:02 GMT -5
What year is it? 03+ are returnless
If it's a 92-02 just look at the fuel rail, should be pretty obvious.
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Post by jmyers8 on Sept 8, 2016 17:42:03 GMT -5
it is a 2004, i did not run a return line in my first heat just an inline pump and it seemed like I was flooding the engine like a return was needed, what is suggested to fix this then. I guess that explains why I couldn't find the return line.
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Post by Ed Becker on Sept 8, 2016 21:43:59 GMT -5
I believe in its form from the factory the computer tells the fuel pump what pressure to put out. Being variable pressure out of the pump, no regulator or return is needed. If running one of these as is, I'd think that dropping the factory pump into the fuel cell of your choice and re-routing the factory wiring might be the easiest way to go. Just a guess on my part. Never derbied one.
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Post by jmyers8 on Sept 9, 2016 6:41:00 GMT -5
thanks guess thats what i didn't want to hear anybody have an idea if you put a regulator on what psi the motor is supposed to run at or if thats possible. the gas tank and fuel pump is long gone so guess I'm stuck trying to figure something out.
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owen11x
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Post by owen11x on Sept 9, 2016 9:50:25 GMT -5
Also can put a older style engine in it big or small block if you have the means and rules allow you to.
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Post by jmyers8 on Sept 9, 2016 13:04:49 GMT -5
rules prohibit engine swaps gotta bé. guess i will have to do some reseqrch and see what I can come up with
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Post by jugulator on Sept 9, 2016 17:48:33 GMT -5
an 04 4.6 doesn't use a fuel return line,,, it utilizes a fuel pressure sensor,, its on the fuel rail..
it has a vacuum line on it,, and an electrical plug,, the computer moniters the pressure and modulates the fuel pump to maintain the 30 to 40 PSI needed to run the motor,,
.......lenny
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Post by jmyers8 on Sept 10, 2016 10:54:50 GMT -5
jugulator , when running an inline pump im guessing the wiring is on the fuel pump that is removed that monitors the fuel pressure? or is there a way to go around this.
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Post by jugulator on Sept 10, 2016 12:15:55 GMT -5
jugulator , when running an inline pump im guessing the wiring is on the fuel pump that is removed that monitors the fuel pressure? or is there a way to go around this. oh shit,,,, i know what happened here,,, you pump is wired to the battery,, right ? so the computer isn't modulating the pressure by cycling the pump.. you have to wire the pump to the cars wiring ,,, it also has a fuel pump driver module,, that might have been in the trunk,,, and jump the ineria switch,, we have a 99 zx2 enduro car with this system.. the fuel pump driver was in the trunk,, ...............lenny
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Post by jmyers8 on Sept 10, 2016 13:21:12 GMT -5
yes you are correcte by wiring the inline pump will it autommatically monitor and adjunt the fuel even being an after market fuel pump?
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ron17t
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Post by ron17t on Sept 10, 2016 14:21:04 GMT -5
insert code here How important can the driver module be? The 04 that I ran this year had a factory tank with the factory pump and wiring.I jumped the inertia switch, but I ran a secondary ground and direct power to battery like I always do. So if I'm thinking correctly even though I had factory wiring hooked up I bypassed the driver module by hot wiring the pump, and the car ran fine. I normally run an aftermarket tank but just didn't have time to switch tanks. I imagine if you did this on a street vehicle it would set a code and CEL would come on from a fuel pressure sensor, but the regulator should modulate the pressure. The fuel pump doesn't recieve varying amounts of voltage does it?
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Post by jmyers8 on Sept 10, 2016 21:19:32 GMT -5
no the pump is just a universal inline pump, i have used it on many cars but always ran a return. I guess I will have to look around to see if I can find a module. right now the pump is just rán to a to gule switch power ed by the car battery. also all wiring was for the most part left intacte under the ho od but there was several wires i cut taking the tank out. I have ran the car up and down the road múltiple Times under pressure and haven't been able to duplicate the problem. but I know as soon as i pull into the derby it will happen.
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Post by jmyers8 on Sept 11, 2016 11:44:28 GMT -5
só i found the module and disconnect and also the disconnect on the fuel rail and disconnect all these and ran it and got it up to temperature with just the sending line on the in line fuel pump. it still seemed to run good and even under pressure never bogged down. I'm just wondering if it will be ok or once it gets hot and on pressure if its going to bog down again. I still have everything disconnect and will try the same scenario again.
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Post by homer2 on Sept 11, 2016 11:53:25 GMT -5
So, why can't you just put an older fuel rail on it and run a return line?
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